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DROK Charge-Discharge Multi Testers, DC 0-120V 300A Power Meter with Color Digital LCD Display, Battery Volt Amp Power Capacity Temperature Monitor, Voltmeter Ampmeter
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | DROK |
Power Source | Battery Powered |
Style | Digital |
Color | Black |
Measurement Type | Ammeter, Voltmeter, Multimeter |
About this item
- Upgrade Version --- Clearer Display, Volt Amp Curve, Wider Measuring Range, Temperature Measure Function.
- 9-IN-1 MULTIMETER --- measure and display voltage (0-120V), current (0-300A), power, battery capacity, amp-hour, watt-hour, time simultaneously, temperature, and charging figure
- 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, over temperature etc.
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Product details
- Package Dimensions : 5.28 x 3.94 x 3.15 inches; 6.7 ounces
- Date First Available : December 25, 2021
- Manufacturer : DROK
- ASIN : B09P661829
- Country of Origin : China
- Best Sellers Rank: #38,936 in Automotive (See Top 100 in Automotive)
- #7 in Multimeters & Analyzers
- Customer Reviews:
Product Description
DROK DC 120V 300A Multimeter
Specification:
Measuring Parameters: Voltage, current, power, battery capacity, amp-hour, watt-hour, time.
Voltage Measurement Range: DC 0-120V
Current Measurement Range: DC 0-300A
Voltage Measurement Accuracy: ± 1% ± 5 digits
Current Measurement Accuracy: ± 2% ± 5 digits
Display Resolution: 0.1A, 0.01V,0.01AG, 0.01H(1 min)
Measurement rate: 20 times/second
Display: 1.8 inch LCD color screen
Size(Display Board): 78*42*26mm/3.07*1.65*1.02 inch
Size(Measuring Board): 56*36*34mm/2.21*1.42*1.34 inch
Hall Sensor Size: 79*42.5*26.5mm/3.10*1.68*1.04 inch
Protection Function:
OVP (Over-voltage protection): 0.01V-120V
OCP(Over-current protection): 0.1-300A
OPP(Over-power protection): 0.01W-9.99KW
LOP(Low-voltage protection): 0.01V-120V
OAH(Over-charge protection): 0.01AH-9999AH
OFT(Over-time protection): 1min-99hour59min
Application:
As battery charge-discharge monitor for electric car;
As battery power energy level indicator for photovoltaic system;
As battery voltage current power tester meter.
Other Function:
AH power off memorized function;
Time & AH reset function;
Calibration function;
LCD screen can be switched off automatically or manually.
With output control button to enable/disable output (requires a relay).
Package Includes:
1x Charge-Discharge Monitor
1x Hall Sensor
From the brand
Enjoy Life, Enjoy DIY.
DROK
- An expert in this field for over 10 years.
- A seller who cares you a lot.
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How did we get our start?
DROK has been an expert in this field since 2010. Originally, two of our engineers would like to make our own products and sell to everyone. With love and enthusiasm, DROK was established.
Why do we love what we do?
We cares you a lot. We believe that a good product can bring happiness to our customer. Your satisfaction is our strength.
How do we do, if there's some issue with product?
We care you a lot. Each product you purchase from DROK can share one-year long period service. You can get a brand new replacement if there's any quality issue with your items.
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the accuracy and quality of the battery monitor. They say it's an excellent little battery meter. However, some customers have reported issues with the ease of installation and performance of the product. They mention that the instructions are very limited and difficult to read. Customers also have issues with accuracy and reliability. Opinions are mixed on appearance and ease of use.
AI-generated from the text of customer reviews
Customers like the calibration of the electric circuit testing device. They say it's accurate enough, useful, and easy to calibrate. Some mention that the voltage and current are more accurate than expected, and the amperage reading is accurate. They also say the meter is clear and easy for testing.
"The device appears so far to be accurate and consistent, once you manage to figure out how to calibrate it properly...." Read more
"It's accurate enough (very similar to my BMS and bench power supply readings), but I can't figure out what half the settings do...." Read more
"Its exactly 2 weeks since the monitor been in operation. It is very accurate when it comes to measuring the voltage and amps, you can even calibrate..." Read more
"...Here's the game they're playing... It has settings for adjusting voltage calibration, getting accurate current bidirectional measurement, and lots..." Read more
Customers like the quality of the electric circuit testing device. They say it does a very good job for the price, has a lot of function for the money, and is nice equipment. Some mention that the product has adequate features and performance. Overall, most are satisfied with the quality and performance of the product.
"...(Watt Meter DC 0-300V 200A ) for applications, it it does a very good job for the price...." Read more
"...They will not explain that instructions. Other than that, good unit for the cost." Read more
"...Good value for the price." Read more
"I am pleased overall with this product. The price was right...." Read more
Customers like the battery monitor. They say it's a great basic meter for determining amps and watts. They also say it is very useful for casual battery monitoring and provides a good indication of state-of-charge. Customers also mention that it'll well worth the information regarding the status and health of the battery.
"So, the meter is fantastic, I use it to monitor my LiPO battery bank on my sailboat (attached picture - that was first draft installation)...." Read more
"...There's a little bit of a learning curve with it, but it's well worth the information regarding the status and health of your batteries, charging..." Read more
"I love that this inexpensive product provides a good indication of state-of-charge...." Read more
"This is a very nice basic meter for determining amp/watts. The instructions are slightly confusing the first time through, but this is no big deal...." Read more
Customers are mixed about the ease of use of the electric circuit testing device. Some mention it's super easy to calibrate and work like a champ, while others say that the first unit they received did not work. Some customers also say that parts turned black and are no longer usable. Overall, opinions are mixed and depend on individual preferences.
"...It worked well enough and Im keeping it." Read more
"The first unit I received did not work, but the vendor was quick to replace it and the second is working perfactly...." Read more
"...I will check that later.In the meantime, I am still pleased with the performance. I use it as a sanity check on a small trolling motor battery...." Read more
"The meter was working well for a few minutes. Then I fully charged the battery the meter was connected to...." Read more
Customers are mixed about the appearance of the electric circuit testing device. Some mention that it really is very nice and has more capabilities than they expected, while others say that it looks very cheapy and has a strange design decision.
"...It really is very nice and has more capabilities than I expected, it was just hard to figure out...." Read more
"very good, low cost battery status indicator. Used to display status of 2500 watt portable power unit...." Read more
"...Just thought I would report due to my disappointment with the layout of the display and not being able to contact the company to try and help them..." Read more
"...Nice unit otherwise. Accuracy seems good, both on voltage and DC current." Read more
Customers find the installation of the electric circuit testing device to be difficult. They mention that the instructions are very limited, difficult to read, and lacking. Customers also say that the documentation is of very little help at the detail level. They say that it's confusing to configure, and the interface is not intuitive.
"I have two of these. Yes the manual is a little difficult, but how well will you write a manual in a different language?..." Read more
"...The display is mostly okay however, the interface is not intuitive and the directions, while not terrible like other cheap electronics, is not easy..." Read more
"...You have to do this kind of sleuthing because (1) the documentation is of very little help at the detail level ... you're left to guessing and..." Read more
"...Why 2 stars? Lack of documentation, and poor communication.The box comes with a useless instructions and wrong info...." Read more
Customers are dissatisfied with the accuracy of the electric circuit testing device. They mention that it doesn't measure voltage very accurately, has limited accuracy at low current, and gives inaccurate current readings. Some say that the battery percentage is not accurate.
"...The units are small and a challenge to configure, but once done, you will like it...." Read more
"...Seems like the current is hooked up backwards ... but you can't fix it.I've kept all three units kind of as an adventure game...." Read more
"...The battery percentage is not accurate, but! The numbers are correct, so I just go off the numbers and ignore the battery percentage...." Read more
"This unit does not seem to accurately detect small current flows. I ran my 100ah Lifepo4 battery down (11.3v) to the point the bms shut it down...." Read more
Customers are dissatisfied with the performance of the electric circuit testing device. They mention that it is poorly engineered, faulty, and unreliable. The display fails after a few uses and is garbled after few minutes. Customers also say that the device is not what it appears to be and is cheap junk.
"This unit is not what it appears to be...." Read more
"The first unit was defective display it goes all garbally after a few minutes and then you have to unplug for 30 minutes to get it to look good again..." Read more
"...However, the display is not capable of displaying the negative sign, so it is not capable indicating which direction the current flowing...." Read more
"...The DROK meters are sensitive in a very bad way and unreliable and I have given more than a fair shot." Read more
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Top reviews from the United States
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The relay trigger that is built into this has not been used yet. I may use it in the future with and Arduino solar project I am working on.
The input voltage should be calibrated to match your digital voltmeter. I suggest clipping them both to the same source simultaneously to achieve this.
Reviewed in the United States on July 4, 2023
What it does:
It measures and displays real time current and voltage. I keeps track of time. It reports real time amp-hours and watt-hours. It reports cumulative amp-hours and watt-hours.
What it does not do but implies it does:
It does nothing to protect the charger or the chargee or load. It allows you to set elapsed time, high voltage limit, low voltage limit, high current limit, high power limit, high amp-hr limit, overtime limit. It has a display annunciator when any of these limits are exceeded (turns an arrow that is green or red or white to gray). But it doesn't show you what limit caused the termination.
But much much worse. You can't do anything to protect what you are monitoring to protect. The reason seems to be they took this display off of a couple higher current (100A external Hall effect sensor in one case ... this one is internal shunt 20A) units which have support for a relay. I didn't have a need for the higher current and the 100A Hall effect unit I tested drifted so was useless to me. I simply bought this lower current internal version assuming everything else to be the same. Turns out there is no support for a relay or external control at all.
Now I'm left to trying to see if there's an internal point on which I can capture the protection signal and direct it to a MOSFET and then a relay.
You have to do this kind of sleuthing because (1) the documentation is of very little help at the detail level ... you're left to guessing and experimenting; (2) there are some serious software bugs (e.g. reset current to zero when it is not zero causes you to go through an undocumented calibration process; doing a long press when it calls for a short press to clear accumulators causes it to hang; (3) customer support (hard to find and reach) is polite but useless ... I'll take rude but effective any time. They just keep say "we are just a small company". Even small companies can take the time to write useful documentation.
And one thing that just blows me away. It has this cute little battery display that shows a reducing green level that turns red when your near low voltage.... kind of like a gas gauge. At least that's what you'd expect it to do. But it works opposite. It starts out showing 0% at full charge and increases to 100% at zero charge. Seems like the current is hooked up backwards ... but you can't fix it.
I've kept all three units kind of as an adventure game. They're really not very expensive.
But I've sure wasted lots of time on this adventure game.
As a controls systems engineer, I expect the display to hold to standards such as the meter mentioned above. Also, when trying to contact Drok, there is no way I can do this, I thought I could help them with design, we speak fluent Chinese science.
This meter does not have a negative sign on the display next to the amperage measurement value to show the flow of amperage. For example: Out of the battery is negative, into battery is positive (no sign on the value indicating flow direction).
Rather, they have an indicator that is not intuitive at all next to the OUT value on the display. Thus, I am disappointed with this purchase due to the lack of instrument convention making the reading non-intuitive for understanding the direction of current flow.
This is my first impression, I have not checked the remaining functions. Just thought I would report due to my disappointment with the layout of the display and not being able to contact the company to try and help them in the USA market.
Also, I learned to reset the battery graph/values by moving the yellow dot past the LOP option then press OK once. this clears usage data. Toggle the battery display with the OK button.
Going over other peoples comments really helped me a lot.