DROK Battery Coulometer DC 8-100V 500A Split Type Multi Tester - Clear

In this review the DROK Battery Coulometer is evaluated as a practical monitoring tool for users who need accurate battery metrics across a wide voltage and current range. The single biggest reason to consider it is the combination of a large 2.4 in color LCD and wide measurement range (8-100V, up to 500A) that delivers clear, continuous readouts of voltage, current, power and cumulative capacity for solar setups, RVs or automotive use. It suits technicians and hobbyists who want numeric precision and a visible state-of-charge readout.

Key Features

• Wide voltage and current range: Measures 8-100V and up to 500A so it can monitor most 12V, 24V and higher battery systems without needing different meters.
• Accurate measurements: Voltage accuracy of 1%+2 digits and current precision of 0.5%+2 digits give reliable readings for capacity tracking and system diagnostics.
• High update speed: The meter samples at 20 times per second, which helps capture changing loads and charging currents in real time.
• Large color display: The 2.4 in LCD provides high contrast and is easy to read in daylight or at night with adjustable backlight brightness levels.
• Backlight alarm and SOC functions: Configurable low voltage and low capacity alarms and a flashing backlight help prevent overdischarge and draw attention when limits are reached.
• Capacity and power tracking: Tracks amp hours up to 99999AH and power up to 50KW, making it useful as a coulometer and watt meter for long term monitoring.

Who It's For

The DROK coulometer fits owners of RVs, boats, off-grid solar systems and workshop battery banks who want a clear visual monitor of voltage, current, power and state of charge. Its split design and broad ranges mean small vehicle systems and larger 24V/48V arrays can be monitored with the same unit.

It is also a good match for audio installers and EV hobbyists who need bidirectional charge/discharge tracking and retained capacity data. Those looking for plug-and-play simplicity with minimal setup may find the configuration of capacity, screen timeout and reference current requires reading the instructions and a little patience.

Pros & Cons

Pros

• Wide measurement range covers many system voltages and currents up to 500A.
• Large, high-contrast 2.4 in color LCD that is easy to read both day and night.
• Accurate readings with fast sampling (20 times per second) suitable for diagnostics.
• Useful backlight alarm and capacity percentage functions for battery protection.

Cons

• Configuration has several settings (CLR, BAT, BPC, LED, STE, STI) that can be tricky for first-time users.
• Instruction clarity varies between users, so setup may take extra time for some buyers.

Specifications

Voltage Range	8-100V
Current Range	0.05-100A, 0.1-200A, 0.15-300A, 0.2-500A (model dependent)
Power	0-50KW
Capacity	0.1-99999AH
Display	2.4 in LCD color screen, adjustable backlight
Measurement Speed	20 times per second
Dimensions (display board)	86x53x17mm

Our Verdict

The DROK Battery Coulometer is a solid, value-oriented monitor for anyone who needs accurate voltage, current, power and amp-hour tracking across multiple system voltages. It is best for RV, solar and automotive battery monitoring where a readable color display and configurable alarms matter; buyers who prefer minimal setup may need to budget time to configure the device correctly.

Frequently Asked Questions

Can this meter monitor both charge and discharge?
Yes. The unit tracks cumulative amp hours and supports bidirectional monitoring to report charge and discharge and retained capacity.

Will the display retain data if power is interrupted?
Yes. Customers report the meter retains capacity data when power is interrupted, so SOC tracking continues after power is restored.

Is the backlight configurable and does it alarm?
Yes. Backlight brightness is adjustable and the screen will flash when capacity drops below the set percentage or when voltage hits the low voltage point, providing a visible alarm.