13 best drok charge controllers

Product description

DROK Battery Charge Discharge Protection Module



Product Introduction:

The module adopts single-chip microcomputer intelligent control, displays the remaining capacity of the battery pack through the ten-level color bar, users can know the working status of the battery in real time. With intelligent charge control, overcharge protection, over-discharge protection, one-key load control output. Intelligent charging and discharging control functions are realized through external relays. 



Product Parameters:

1. Suitable battery types and series number:

Lithium polymer battery (nominal 3.7V): 1-23 cells

Lithium iron battery (nominal 3.2V): 1-26 cells

Storage battery (nominal 12V): 1-7 cells

2. Technical parameters:

Input power supply: 10-90V 

Detected voltage range: 2-100V

Working current: 50-100mA

Working temperature: 0-60℃

Factory Default 4 cells Lithium polymer battery, please set parameters according to actual needs before using.



Package Including:

1x Battery Charge Protection Module

• DROK battery charge discharge protection module adopts single-chip microcomputer intelligent control, displays the remaining capacity of the battery pack through the ten-level color bar, users can know the working status of the battery in real time.
• Parameters: the intelligent battery charge protector input voltage range is DC 10V-90V, deteced voltage range is 2V-100V, suitable for Lithium polymer battery (nominal 3.7V): 1-23 cells; Lithium iron battery (nominal 3.2V): 1-26 cells; Storage battery (nominal 12V): 1-7 cells.
• Application: the battery charging discharging controller can be applied to electric vehicles, balance cars, mobile portable devices, solar charging, instrumentation, etc., batteries within 100v, storage battery, polymer lithium battery, iron lithium battery.
• Protection: our battery charge-discharge control board is designed with over-charge protection, over-discharge protection function.
• Factory Default 4 cells Lithium polymer battery, please set parameters according to actual needs before using.

User questions & answers

Question:	Will this function as a low voltage cutoff to cut off at 20v
Answer:	Dear customer, thank you for your inquiry. It is made in China.
Question:	What are the three leads? Power to this board? I can't seem to figure out what the yellow is for. "Measured voltage", measured voltage of what
Answer:	Because it is stored in the Amazon warehouse, the Amazon warehouse is sealed, so it may have a bit of smell, but it is made of environmentally friendly materials and it is made from high-quality, odorless and three-ply composite non-woven fabric
Question:	What is the max amp input (eg. @~14v) ? 30amp
Answer:	Yes, it fits. Each bag measures 50 x 35 x 50 cm / 19.7 x 13.8 x 19.7 in. The capacity is 87.5L which is 50% larger than others. It is spacious for storing your comforters, blankets, pillows, plush toys, jackets and other clothes.
Question:	Will this work on an 3s setup
Answer:	Yes, durable enough for me. I used this storage bag to storage a bag full of winter clothes, almost 30 pieces. When I lifted it up, the handles were still strong.

• 7-IN-1 MULTIMETER --- measure and display voltage (0-90V), current (0-100A), power, battery capacity, amp-hour, watt-hour and time simultaneously.
• APPLICATION --- can be used as battery charge-discharge tester meter for automobile and car battery; as battery capacity monitor for photovoltaic system; as voltage meter, current meter, power meter, etc.
• BIDIRECTIONAL AMMETER --- the multimeter can detect current in dual direction without changing the wiring direction when used for monitoring charging and discharging.
• PROTECTION --- over-voltage protection, over-current protection, over-power protection, over-charged protection, time limitation, etc.
• OTHER FEATURES --- LCD color display; AH power off memorized function; time & AH resettable; calibration function; automatically/manually switch off LCD screen; with output control button to enable/disable output (requires a relay).

User questions & answers

Question:	I don't think i have all the cables. I have a black and red one for bat and i have 2 ofbthevwife white ones that connect then tigether ti communicate
Answer:	It comes with a multi conductor ribbon cable for about 12-18 inches. You may be able to extend that through some DIY soldering and creative wiring. I don’t know how that will affect the readings. You may be able to find a cable on Lin’s with the correct plugs and ribbon to reach your desired layout. Good luck.
Question:	is this weatherproof
Answer:	I haven't tested anything besides the low-voltage protection, but it seems like all the protections can be run simultaneously. You can pick and choose which one(s) to have "armed" as well as set each trigger parameter. The caveat is that it is a only a relay cut, without any automated reconnect. So if any of the protections are triggered, it cuts the external relay, then to reconnect you have to press OK on the "OUT" parameter to re-activate the relay.
Question:	In the application I have, I need to separate the sensor module from the display by about 3 m. Is it possible to lengthen the cable
Answer:	Roughly 3in
Question:	Does programming allow relay controller setting protections to run simultaneously OR is it only “choose one” from the list of monitoring options
Answer:	Dear customer, So far we don't have 200 amps module. Best regards, DROK

Product features

Buttons

If the relay (this product doesn't contain a relay) is connected, press the button ↑ ↓ to move the yellow cursor to OUT after powering on, and press OK to control the output. If the OUT light turns green, the output will be turned on; if the OUT light is gray, the output will be turned off. And the power state of the machine will be the state before the last shutdown. If the relay is not used, the output is always on and the OUT light won't work.

Protection function menu

Protection Function Menu:

OVP (Over-voltage protection): 0.01V-90V OCP(Over-current protection): 0.1-100A OPP(Over-power protection): 0.01W-9.99KW LOP(Low-voltage protection): 0.01V-90V OAH(Over-charge protection): 0.01AH-9999AH OFT(Over-time protection): 1min-99hour59min

For details on how to set each protection, please check User Manual [PDF ] from Product guides and documents on this page.

Hall Sensor

Pass the wire that transports current through the round hole of the hall sensor, then the current will be detected. The current can be detected in both positive and negative directions, which is safe and convenient.

NOTE:

1. Do remember to correctly wire the hall sensor, power supply and load according to the instruction.

2. Check the jumper connection, which needs to be connected on J4 when no extra power supply for the hall sensor, while on J3 with an extra power supply added to the hall sensor.

Product description

Instructions for use：

Connect the power supply and equipment, the measuring temperature is displayed, press the "SET" button,

press " + or - " to set the desired temperature (long press " + or - " to quickly increase or decrease),

press "SET" to confirm the setting and return, controller automatically performs the relay ON/OFF.

the thermostat output is 10A relay, meet a variety of high-power loads.

LED Indicator: LED off indicates the relay off; Lighting,indicates the relay is closed.

Digital LED Tubes: "LL" indicates sensor open, "HH" indicates overrange,

the relay will be forcibly disconnected; "---" indicates high temperature alarm

Long press the "SET" button to enter the main menu settings,

press " + or - " to switching between P0-P6,

then long press "SET" or 10 seconds without keystrokes to confirm the setting and return.



Buttons:

P0 :Cooling / Heating; Range: C/H; Default: C

P1 :Hysteresis Setting; Range:0.1-15; Default: 2

P2 :Highest Setting Limit; Range:110; Default: 110

P3: Lowest setting Limit; Range:-50; Default: -50

P4 :Temperature Correction; Range:-7-7°c; Default: 0°c

P5: Delay Start Time; Range:0-10 Minute; Default: 0

P6: Key Tone Switch; Range:0-110; Default: Off

When the Thermostat is power off, long press "- or +", you can restore the factory settings



Package Included:

1x Digital Temp Controller

User questions & answers

Question:	Can i use this in a car to be used as thermo switch to my aux fan
Answer:	It could, if you set the # of cells correctly and if the internal program for that many cells is set to disconnect at 20v. In other words no. Don’t trust it, the documentation does not have that much detail. Try victron battery protect or similar
Question:	How do I make this switch on a heating element when the probe gets too cold
Answer:	This senses the voltage of your battery. It controls the low voltage relay on and off and the charge relay on and off. If you are controlling the battery that powers the device hook the yellow and red together.
Question:	Is this unit suitable to control a small water pump that I use with a solar pool water heating. Can it turn on at a certain temp? Off at lower temp
Answer:	The switching amperes of the relays. Charging control is 10 amp. Load disconnect is 30 amp. The push button relay is 10 amp. The operating ampere is less than 1 amp.
Question:	what voltage can load handle
Answer:	Yes

Product description

DROK Battery Tester Digital Voltage Ampere Power Energy Multimeter



Technical Parameters:

Model: WLS-PVA200

Current measuring range: 200A

Current resolution: 0.2A

Power supply range: DC5～90V

Voltage measuring range: DC0～300V

Voltage resolution: 0.1V

Capacity measuring range: 0～999AH

Power measuring range: 0～999KW

Electric energy measuring range: 0～999KWH

Measurement error:±1%

Refreshing speed: 0.5S/time

Installing size: 76.0mm * 39.5mm

Diameter of transformer:Φ20mm

Working current: backlight on: 10MA;backlight off：4MA

 

Package includes:

1 X LCD Digital Cullen Meter 

• Multifunctional Meter: DROK multimeter panel is available to measure percentage and AH of remaining capacity, DC positive and negative bidirectional current, DC voltage, DC positive and negative power, DC positive and negative bidirectional accumulated electric energy. Voltage measurement range is DC 0-300V, current measurement range is 0-200A.
• Hall Sensor & Easy Mount: the voltage amperage meter is coming with a Hall transformer to for isolated measurement, reliable and safe; accepting two-wire system connection and three-wire system connection, could be powered DC5~90V, easy and simple to wire this meter up.
• Display: backlight can be controlled to be ON or OFF as user’s need; Equipped with full angle of view LCD screen, users could see the display clearly whenever at night and day, indoor or outside, even under the sunshine.
• Alarming Function: it will alarm and flash to draw your attention when the real voltage is higher or lower than preset alarming voltage and real current is higher than preset current; It will also alarm and flash to remind you to charge for your device when the remaining capacity of battery is low.
• Wide Applications: Can be used as dc amp meter, digital volt meter, power meter, battery capacity monitor. Suitable for all kinds of batteries, such as Lead-acid batteries, Lithium Polymer batteries, lithium iron phosphate batteries and etc. With function of storing date when power down, using this meter, no need to worry that your electric data will be lost.

User questions & answers

Question:	what is the actual size of the product? lxwxh .. nothing listed here
Answer:	Inside measurements for the cut out are 72mm wide, 39mm tall and 25mm deep. The outer face plate is 7mm wider and 3mm taller, not much difference. I made a matting skirt out of thin black plastic since it's very difficult to cut a perfectly sized rectangle in the wall.
Question:	How to use menu options no user manual is included
Answer:	Dear customer， We have pdf manual on product deatils page. It can be found on the "Technical Specification" from this page. Or please click on this link directly. https://m.media-amazon.com/images/I/B1ubSSVdpyS.pdf Best regards, DROK
Question:	specs say it is a 200A meter, yet some say its only goes up to 100A, can anyone confirm this can measure up to 200A
Answer:	im sitting looking right at one 6months installed ... it regularly measures 155 amps of 12volt charge and up to 199amps discharge .... those are my system limits witb a 5000w inverter several golf cart batteries and two 100amp chargers
Question:	How long i as the cable for sensor and what is max wire size that will fit in sensor
Answer:	The sensor cable is about 8 inches long but i cut my cable and extended it to about 10 ft. I testes it up to 15ft and it worked fine. You could possibly go longer. Just use a good quality multi wire cable, or make your own. About 18AWG probably OK. I recall the hole as 20mm, roughly 3/4 inch diameter. No problem for RV battery cable. Remember you can run more than one wire through the hole, That way you can still use battery terminal as the tie point for the various wires that may already be connected there. The sensor will read the Sum of currents, that is for example, if you have charging from a solar system at say 5A, and a discharge load to lighting at say 3A, your meter will show 2A charging. Hope this helps

Product features

Buttons

With 2 buttons to be easily operated.

Bi-direction Current

With the capability to measure current in forward and reverse direction.

Backlight Control

Backlight can be manually turned on/off via the button.

Can be clearly viewed in any light conditions.

• APPLICABLE BATTERY --- DROK digital battery monitor is suitable for 10-100V (12v 24v 36v 48v 60v 72v 96v) lithium battery, lead-acid battery, lithium iron phosphate battery, Ni MH battery. Default 12 volt lead acid battery.
• APPLICATION --- this multimeter can be used as battery voltage meter, battery capacity tester and temperature indicator panel for car, marine, RV, boat, etc.
• PROTECTION --- the battery power detector comes with protective shell, dustproof waterproof surface; input reverse connection protection.
• LCD DISPLAY --- the battery status reader adopts clear LCD color screen, displays battery capacity, voltage, temperature value(switched by the key).
• ALARM --- if low voltage, red indicator flashes and buzzer alarms.

User questions & answers

Question:	Does it read in Fahrenheit
Answer:	It is enclosed in a heavy plastic case. The company claims it will stand up to the weather. If it is enclosed in a container then I would say yes it would work outdoors in the weather.
Question:	How much power does this meter consume when on
Answer:	This device ONLY measures battery Voltage. Voltages are estimates of available energy, not an accurate measurement, especially as batteries age due to internal resistance. You can permanently damage some batteries by discharging them too far. This device will not prevent that damage.
Question:	I'm thinking of using it for an outdoor project. Will it stand up to the elements
Answer:	Dear customer, If you are going to monitor battery, please connect it to the "Load" position. Meter have to work with shunt. Best regards, DROK
Question:	Isn't 20 AWG wire too thin to be hooking up to a 12v battery or do you use special battery terminal connectors
Answer:	Yes Considering the shunts as resistors, they obey the 1/R law. If each shunt of 1 ohm then 1/R= 1/1+1/1+1/1+1/1 1/R=4 R=1/4 then I =V across shunts/(1/4) This should hold true for the real world. Remember Voltage = (I)(R)

Product features

Multi-functional Meter

Our batter meter is fully functional type, not only can display battery capacity and voltage, but also can display the Celsius temperature, two kinds of modes could be easily switched by the key.

Switch ON/OFF

Still wondering the old type of battery meter that without on/off switch? The old type of battery meter cannot be turned off unless cut off the wiring connection.

Our battery monitor meter is designed with the turn on/off switch, convenient for your daily using.

Back Cover & Removable Wire Terminal

It is built with well made back cover to protect the battery from damaging and dust.

Removal wiring terminal, convenient for your installation and store.

Detailed Dimension 1

Detailed Dimension 2

Opening Size

What Kinds of Battery is Suitable for The Meter?

DROK battery meter is suitable for 10-100V(12v 36v 24v 48v 60v 72v 96v) lithium battery, lead-acid battery, storage battery, lithium iron phosphate battery, Ni MH battery etc.

Where Can I Use It for?

This functional battery detector can be applied to various instruments and meters; such as portable device, power bank, medical device, robot, golf cart, electric motorcycle and self-balance car.

Product description

DROK 24V 12V to USB Adapter



Parameter:

Input voltage range: DC 8V~35V

Typical input voltage: 12V/24V

Output voltage: 5V/9V/12V (3.7-12V)

Max output current: 4.2A

Output power: 20W

Conversion rate: Max 95%

Working Temperature: -20-65℃

Voltage regulation rate: 1%

Load regulation rate: 2%

Ripple: <150mv

Waterproof level： IP67

Input wire: 20AGM (One meter with waterproof insurance)

Output wire: 20AGM (One meter A type female USB)



Package Including:

1x Non-isolated Step-down Power Converter

• DROK DC DC converter input voltage is 12V/24V, output voltage range is 3.7-12V, max output current is 4.2A. Note: the output voltage is Automatic Identification, cannot be adjusted by manual.
• The waterproof car power regulator can convert DC 12V/24V down to DC 5V 9V 12V; with max 95 percent conversion efficiency.
• Features: the buck voltage regualtor is waterproof, dustproof, moistureproof, shockproof, can be applied to harsh working environment.
• Protective function: our step down power converter is designed with over current protection, short circuit protection, over voltage protection, reverse connection protection, over temperature protection.
• Application: the volt transformer supports quick charger QC 3.0, QC 2.0 (3.6-6.5V 3A,6.5-9V 2A, 9-12V 1.5A) Huawei Haisi fast charge FCP; supports Apple devices iphone ipad; supports Samsung devices.

User questions & answers

Question:	Can i power a gopro 7 with this device? i want to power the gopro 7 full time using this as an action cam on my jeep wrangler
Answer:	http://www.amazon.com/Partssquare-Cooling-Thermostat-Sensor-Temperature/dp/B015R9AVMA/ref=sr_1_1?ie=UTF8&qid=1456923576&sr=8-1-spons&keywords=fan+thermostat+and+relay+switch&psc=1That would be more like it for a vehicle... The DROK is for different applications...
Question:	Can i use this with my new samsung note
Answer:	You set the temperature you want the device to activate the relay. You connect your heating element to the relay and when the probe reaches the set temp and activates the relay.
Question:	Would this work for arlo go to charge it of solar any electric gurus
Answer:	yes I want down the circulation of water (I'm doing a experiment)
Question:	Would this work with a RaspberryPi 3 B
Answer:	The board takes a 12VDC supply and uses and on-board voltage regulator to power the microcontroller, driver, etc. The relay is rated to 20A either 125VAC or 14VDC

Product description

parameters:

Operating voltage: DC 4.5 ~ 30V

Measure the voltage: DC 0 ~ 100V

Minimum resolution (V): 0.1V(when >10V)

Minimum resolution (V):0.01V(when <10V)

Measure current: 2A / 5A / 10A / 50A / 100A (> 10A, need external shunt)

Minimum resolution (A): 0.01 A

Operating Current: <20mA

Display: three 0.28 "LED digital tube

Display Color: Red + Red; Red + Blue (Dual Display)

Dimensions: 48 x 29 x 21 mm

Refresh rate: 500 ms / times

Measuring accuracy: 1% (± 1 digit)

Operating temperature: -10 - 65 ℃

Humidity: 10 to 80% (non-condensing)

Working pressure: 80 to 106 kPa



wiring:

Black line (thin): vacant or buck circuit (module) is negative

Red line (thin): Power Supply +

Black line (thick): COM, common measurement

Red line (thick): PW +, measuring terminal voltage input positive

Yellow line (thick): IN + input + current



Please note:

The operating voltage must be DC 4.5-30V.

The ammeter can be connected only to the negative of the device.

≤10A, built-in shunt, no need external shunt; > 10A, need external shunt.

When the black thin line free, it is better to use insulating tape around the exposed portion of the wire to prevent short circuits

If only be used as a voltmeter, connect together the yellow and black line.



Package Included:

1x digital amp volt meter

User questions & answers

Question:	This item requires an external shunt. for lower amperge (10a) buy other product from same seller
Answer:	Yes, it should. It's rated at 4.2A. That should be more than enough for 2 or 3 GoPro 7s.
Question:	I want to measure up to 60 volts dc and up to 10a from a pool chlorine generator. it also has a separate 12v dc line. how do i wire this unit
Answer:	Yes, this can charge a Samsung Note 8 with proper USB charging cable (not included).
Question:	do you have a wiring diagram? need to know what the wires go too
Answer:	Did you try this ? I'm looking to do the same thing as the Arlo solar panel is a failure prone piece of junk.
Question:	what are the length and gage of the wire? thanks
Answer:	It should. This unit has Quick Charge capability that I use for Arlo Cameras and Fast Charging Capable Phones. The QC would not benefit powering the RaspberryPI however it should keep the PI powered up. It would be more of a voltage regulator down to 5 Volts. It should continue to power the PI until your power source (battery) drops down to 5 volts.

Product description

Name:

DC to DC buck voltage regulator



Parameter:

Property: non-isolated power supply step-down module

Input voltage: DC 8v~35v

Output voltage: 1.5v~24v adjustable (output should be at least 2V lower than input)

Output current: 5A

Conversion Efficiency: > 95% max.

Over-current protection: 7A

Working temperature: -40~85°c

Operating Frequency: 300KHz

Protection: over-current protection; over-temperature protection



Features:

· Synchronous Rectification

· Aluminum shell, with better heat dissipation, safer

· Organic silicone packaging technology, waterproof, IP67 Protection Level

· U-shape fixing card slot

· Anaerobic copper core wire, less resistance, better conductivity.



Package Included:

1x Voltage Reducer

• PARAMETER ---- voltage reducer; input voltage range 8v~35v; output voltage 1.5~24v adjustable; output current 5A max.
• APPLICATION ---- radio, car audio, LED display, motor, cell phone, electric fan, security camera, electronic project DIY etc.
• SAFETY PROTECTION ---- over-current protection; over-temp protection.
• DURABILITY ---- Waterproof, moisture-proof, dust-proof, shock-proof.
• FEATURES ---- aluminum shell; anaerobic copper core wire; U-type fixing card slot; organic silicone packaging technology.

User questions & answers

Question:	Once you adjust the output voltage, will it stay there or will it vary with amp draw
Answer:	There is an internal shunt in the 10A. The higher amperage meters are identical to the 10A meter except for the internal shunt on the 10A meter.
Question:	Does the output voltage change with load after you set it
Answer:	10awg or 8awg wire should be ok
Question:	I need 12v5a constant power and I'll be using a car battery. will this work
Answer:	Search the pictures on other listings for this item - several of them show wiring diagrams. God luck though as I never got the current reading to show anything sensible...
Question:	How do you adjust the voltage out? i have 7.4 volts in from lipo battery and i'm looking for 5 volts out
Answer:	wire length is about 6inch and guage of wire is like for the power for the led's is aprox. 22 guage and depending on the amp rating 14 to 12 guage.

• DROK power supply module input voltage range is DC 5.3-32V; output voltage range is DC 1.2-32V, can be arbitrary adjustable; output current can be 8A for long term use, if enhance heat dissipation, it can reach 12A; max output power is 120W, if enhance dissipation, it can reach 160W.
• LCD Display: the buck converter is designed with LCD, can display input and output voltage, output current and output power; voltage display resolution is 0.05V, current display resolution is 0.005A.
• Safe Protection: the voltage regulator module is with reverse connection protection at input terminal, reverse connection will not burn; short circuit protection.
• Application: the volt conversion board can be used as an ordinary buck module with over-current protection; used as a high-power LED constant current driver module; DIY a solar power controller, etc.
• Button Control: button control output voltage ON / OFF status, and you can set the default output state is ON or OFF of the next time power-on.

User questions & answers

Question:	Why the builtin current meter shows in/out currents the same when i am stepping it down from 12v to 5v? hope it didnt waste all (7 x current) watts
Answer:	7 watts is 7 watts current no matter what the voltage is. The “in” current should be the same as the “out” current minus whatever the module uses in the step down process - which is negligible. If you want to limit the current (watts), the other pot will do that.
Question:	Can i charge a 12v car battery with this if i have a laptob cord or computer power supply hooked to it
Answer:	As long as the laptop power supply can output at least 16 volts. A 12v computer power supply hasn't got enough voltage. A car battery needs approx 14v. You can Google the proper charge voltage for your chemistry. This is buck only so the supply voltage must be higher than the desired output voltage. This power supply has no way of knowing when the battery is fully charged. So be careful what you set the output voltage to so as not to over charge the battery. Hope this helps.
Question:	what is the input range of amps for this unit
Answer:	This is a BUCK converter which is a POWER converter capable of about 120W (max). The input current range will be based on the input voltage and the output POWER. Remember P= E x I, or I= P/E. Since the converter is spec'd at about 96% efficient (I'd use 90%), the input current will be the (output power / 0.9) / Input voltage. (Pout / efficiency) / Input voltage. Input voltage MUST be above output voltage, for this converter, about 1.5V. Example: At an output power of 120W (10V @12A maximum output current spec) and an input voltage of 30V, the input current will be I = 120/.9/32 = 4.44 A. This current will be expected for any combination of output voltage and current that totals 120W, as long as the output current of 12A is not exceeded. If you reduce the input voltage, to 12V (about the minimum allowable at 10V output) the input current will be 120/.9/12 = 11.1A. The extra amp is for the 10% loss in the converter. Warning: In actuality the converter would have trouble delivering 10A at 120W output because the current in the switching transistors (MOSFETs) would be high and would dissipate excess heat. Be sure to install a heat sink to control dissipation. Be sure your source can deliver at least 50% above the calculated input current at the power output and input voltage required.
Question:	Is there an operating/owners manual
Answer:	Good day. You can get the user manual on product detailed page ---> Product information ---> Technical Specification ---> User Manual [pdf ] You can also get it via the link below: https://images-na.ssl-images-amazon.com/images/I/C1RCvx6bFMS.pdf If there are any problems, please feel free to contact through Amazon's direct messaging service: https://www.amazon.com/ss/help/contact/?_encoding=UTF8&marketplaceID=ATVPDKIKX0DER&ref_=v_sp_contact_seller&sellerID=AFHAE9RJVUMB Best regards.

Product features

DROK Buck Converter

Parameters:

Input voltage range: DC 5.3-32V

Output voltage range: DC 1.2-32V (input should be at least 0.8V higher than output)

Output current: 8A for long-term stable work. If strengthen heat dissipation can reach 12A.

Output power: natural cooling 120W (within 8A). If enhance cooling can reach 160W

Display input voltage & current.

Display output voltage & current.

Display input voltage & power.

Display output voltage & power.

• PARAMETER ---- voltage test range DC 6.5~100V; current test range 0~100A; power test range 0~10kw; battery level test range 0~9999kwh.
• DATA GUARANTEED ---- with power-off storage function, all parameter will be stored automatically when powered off; accumulated energy data can be reset.
• OVER-VOLTAGE ALARM & SETTABLE ALARM VOLTAGE ---- if active power is larger than threshold, backlight and power will flash as an indicator.
• LARGE-SCREEN LCD ---- display voltage, current, power, energy at the same time.
• SWITCHABLE BACKLIGHT ---- backlight can be turned on/off manually.

User questions & answers

Question:	When used to measure the voltage and amperes fed to the battery as opposed to battery output can/should you leave out the shut? 1 output side also
Answer:	Dear customer, This meter is non-waterproof. Best regards, DROK
Question:	If I use 4 shunts in parallel, would device show 1/4 of actual current flow ? I need to measure up to 400 A draw
Answer:	Whereas I have not personally exceeded the maximum reading capability of this particular instrument, I have done so with many, many other ammeters, digital and analog with no consequence as long as the amount and time of overload is reasonable. The actual current being utilized by the meter's internal circuitry is in the micro amp range with little chance of heat damage. I'd assume that an overload indication such as a flashing display or , "err", "hhh" or "ovr" would be displayed.
Question:	Is this device weather tight, i.e., for installation in a sailboat control panel
Answer:	The add says voltage range is AC 80-300V. A standard conmen U.S. home outlet is only 110 to 120 volts. I was think it means it can't read below 80 volts are above 300 volts and only alternating current. AC = alternating current is standard conmen U.S. home power type. ("80-199V" Up to 300 or 199 volts) I am think that is someone's typo? Hope that helps.
Question:	What would happen with an occasional 200a draw? Would it just not measure it correctly or would it be permanently broken
Answer:	First, you are aware that it has a FLAT plug, which is not common for 220V. The picture show 236 so I assume that it will have a "2" digit which is also not common. Most voltmeters are have a ONE for the most significant digit, but it shows a "2" which means that it will read 200. Also note that the accuracy is stated at 1.5% +or- 2 digits. There have been complaints that the meter is off by 3 Volts...which is well within the specs and is typical for an AC voltmeter.. At 230, it could be off as much as 5 volts and still be in spec. Also this same voltmeter is available as a single voltmeter from Amazon, if you only need one, but you have to hunt for it.

Product features

DROK DC Power Meter

• Easy to install and use
• Voltage current power enery monitor DC 6.5-100V 0-100A
• Can be used to monitor battery bank status, such as RV solar panel system, travel trailer

4 in 1 Meter

Test range:

Voltage: DC 6.5~100V

Current: 0~100A

Power: 0~10kW

Energy: 0~9999kWh

Convenient Button

Store energy data when power off(can be reset to 0).

The blue backlight can be turned on/off manually

With overload alarm function (If active power is larger than threshold, backlight and power will flash

Dimension

Recommended cutout:

3.33"(L)x1.76"(W)x0.95"(H)

84.6mm(L)x44.6mm(W)x24.4mm(H)

• PARAMETER --- input voltage range DC 6V-32V; output voltage DC 1.5V-32V; max output current 5A, recommend use of within 4.5A; max output power 75W, recommend use of within 50W.
• GENERAL USE --- as ordinary step-down module with over-current protection; as constant current LED driver module; DIY a solar power controller, etc.
• DISPLAY --- large clear digital LCD display voltage & current value simultaneously.
• FEATURE --- constant current/voltage mode; voltage calibration & current calibration; USB interface; protective case; short-circuit protection; over-temperature protection; input reverse connection protection.
• NOTE --- 1). Output voltage is set as around 20V by default, if your input is lower than that, please turn potentiometer anticlockwise for 10 laps or more until voltage changes. 2). The case is packaged unassembled to avoid damage during transit. It needs to be manually installed. 3). Please carefully read the user’s manual, especially the “Cautions” before using. You can find the PDF Instructions on this page -- Product information -- Technical Specification -- User Manual [PDF].

User questions & answers

Question:	In the instructions it says to use a diode if using for charging, where does the diode go
Answer:	I don't know what application you are talking about, or which instructions your are talking about, but the right diode in between the power supply and the 'in' on the DROK would not hurt. It probably would be a good thing to have one on the 'out' line as well. A diode is a electric check valve that keeps the power going one way, and will the power to reverse and go backwards. I have solar panels, and they each have a diode right in the box on the back of the solar panel. The power comes from the panel, through the diode, to my DROK adjustable converter, 'IN' the DROK - where it is adjusted - 'OUT' the DROK - to the battery it is charging. This makes the DROK a monitor/regulator. If you have any other questions, let me know, describe your application, (power source, and where the power is to be used) You can also use the DROK as a super light dimmer control, or to control the speed of any small motor.
Question:	I need a cheap driver for an 18v, 42w led light. Has anyone used this with a similar or higher output and does it work well at that high an output
Answer:	Yes it should. I haven't used it for an 18v LED but I have used it for multiple 12v LEDs and even a couple 15m 12v LED Strips. It perform quite well. I have used it at 36v for charging my Xiaomi Mijia M365 electric kick scooter for a short period also. The only issue I have come across are the little red button pieces, they tend to slide off the momentary button on the circuit board and become kinda lodged under the plastic case. But I wouldn't hold that against purchasing this item since the functionality isn't degraded because of that.
Question:	Delivered without instructions -- where can a 'user's manual' be found
Answer:	Hi, there is a PDF Instructions on the product page -- Product information -- Technical Specification -- User Manual pdf https://images-na.ssl-images-amazon.com/images/I/C1X8DiomGTS.pdf Hope it could help you.
Question:	Is the usb output fixed or is it adjustable
Answer:	It's not fixed. I had it as high as 13.3 volts in my application of the USB connector. You need to set output to 5v before using any standard usb device.
Question:	Are these marked with model numbers? I would hate to get these and have no clue of each one's model numbers once out of box
Answer:	yes they are , and if you look up number it will give you voltage and current characteristics for the model number

Product features

F-0 Mode

Display output voltage.

F-1 Mode

Display input voltage.

F-2 Mode

Alternately display output voltage & input voltage.

USB Mode

Display USB output voltage.

Turn on/off USB output.

Product description

Parameters: Module Name: DC buck module (Synchronous rectification) Module model:2203ADJ Input voltage: DC 8-22V（22V Max） Output voltage:1-15V (adjustable,please ensure input voltage is at least 3V higher than output voltage) Output current: 3A Max. (long-term work in 2A doesn't need to enhance heat dissipation) Conversion efficiency: up to 96%(Max) Static power consumption: about 12mA Ripple output: About 100mV (12V to 5V/3A) Operating temperature: -20 °c to +60 °c (Industrial grade), -40 °c to 80 °c (limit) Min voltage margin: 3V Dimensions: 33 x 25 x 20mm wiring: Red wire: connect the red wire to positive pole of input(input +) Yellow wire: connect the yellow wire to positive pole of output (output +) Black wire: connect the black wire to negative pole of input or output(input- / output -) Package Includes: 1 x DC Converter Module

User questions & answers

Question:	I'm thinking that this is what i need to step down the 18v 39w dc power coming from my solar panel and plug into my 12vdc 3.0 amp battery charger
Answer:	It is a small screw adjuster. Mine stays constant.
Question:	Can I use this to reduce my 48 volts batterys to 12 volts golf cart lights
Answer:	Mine has stayed constant. I went down from 18v to 6v.
Question:	Will this work to convert a pulsed dc input (about 5-10 pulses per second) to a constant dc output
Answer:	I believe so. It has a tiny adjustment screw. I used a volt meter as l had to go from 18v battery down to 6v.
Question:	How hot does it get
Answer:	Turn the screw on the bottom (pictured). Of course you need a voltage meter. For standard 5V you can probably find a pre-set version.

User questions & answers

Question:	Will this drop ac voltage also? i’m trying to drop voltage from model train transformer to power model street lights. output is ac/dc
Answer:	It might, but if you need a 12v dc battery charger, you'd probably be better off using a dedicated solar charge controller. Such as this one: Docooler 20A 12V/24V Solar Charge Controller Solar Panel Battery Regulator Safe Protection https://www.amazon.com/dp/B00L37KZI6/ref=cm_sw_r_cp_taa_y0w.yb8C2REPZ
Question:	What is the size of the board
Answer:	No... Max input is 36volts. However you can tap on one or two of the batteries.
Question:	Where does one add the heatsink mentioned in the description in regards to output power larger than 15W
Answer:	I may, but you would have to test to be honest. Not sure if it's designed for that type of input
Question:	Is there any difference, in terms of electric potential (voltage) or otherwise, between IN- and O-? Curious about wiring them together
Answer:	22 votlts solar panel, 12v output .5 amps fan. 134F for me. this thing gets hot

Product features

DROK DC Voltage Regulator

• Parameters:
• Load adjustment ratio: +/-0.5%;
• Voltage adjustment ratio: +/-2.5%
• Transferring efficiency: 92% max (the higher output voltage, the higher efficiency)
• ON/OFF frequency: 150KHz;
• Output ripple: 200mV
• Power consumption when in static state: only about 3A
• Working temperature: -40 Celsius to 85 Celsius
• Module feature: buck and non-isolated
• Rectification method: non-synchronous rectification
• Adjustment method: please use a mini screwdriver to adjust output voltage by adjusting the potentiometer and recommend you adjust output voltage when being in empty load

• Package includes: 1pcs LM2596 bare board