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The BigBattery 350A Battery Capacity Meter works like a fuel gauge for your battery bank. A low-resistance copper shunt measures every amp going in and out, and the round LCD display shows charge and discharge current, voltage, remaining capacity in amp hours and state of charge.
It works with battery banks from 8V to 120V, so the same meter fits 12V, 24V, 36V, 48V and 72V systems. The shunt is rated 350A continuous with a 500A peak, and readings are accurate to ±1%. The meter is water resistant and comes with the shunt and base mount, a mounting bracket, shielded wiring and a short ring terminal cable. BigBattery provides lifetime USA-based technical support, and it ships from Texas.
See voltage, charge and discharge current, remaining amp hours and state of charge on one display.
The pure copper shunt measures up to 350A continuous and 500A peak with ±1% current accuracy.
Monitor almost any battery bank, from 12V RV systems to 72V golf carts.
The meter draws 10 to 12 mA while working, 0.5 to 0.6 mA on standby and 50 to 60 µA in sleep mode.
A 13.1 ft (4 m) shielded cable keeps the signal stable and lets you mount the display well away from the batteries.
The durable, water-resistant display stores test data, and the preset capacity can be set from 0.1 to 999Ah.
RVs and vans. Know how much battery is left before running the microwave or heading to bed.
Golf carts and utility vehicles. Add a true state-of-charge gauge to a lithium conversion.
Off-grid solar. See how much your array puts back each day.
Boats. Track house battery use at anchor.
Versus a voltmeter. Voltage alone is a poor guide to state of charge, especially with LiFePO4 batteries that hold a flat voltage. A shunt meter counts the actual amp hours.
This may be a good fit if
In the main negative cable between the battery bank and everything else, so all charge and load current passes through it.
Yes. It measures current and voltage, so it works with LiFePO4, lead-acid and other chemistries.
Voltage, current and capacity readings are accurate to ±1%.
13.1 ft (4 m).
The BigBattery 350A Battery Capacity Meter turns any 8V to 120V battery bank into an easy-to-read fuel gauge. At Outbound Power, we help customers choose the right parts for their solar and battery systems. If you have questions, our team is happy to help.
BigBattery 350A Battery Capacity Meter Specifications |
|
|---|---|
| SKU | MTR105-CBL079 |
| Working Voltage | 8V to 120V |
| Working Dissipation | 10 to 12 mA |
| Standby Dissipation | 0.5 to 0.6 mA |
| Sleep Dissipation | 50 to 60 µA |
| Voltage Accuracy | ±1% |
| Current Accuracy | ±1% |
| Capacity Accuracy | ±1% |
| Preset Capacity Value | 0.1 to 999Ah |
| Shunt Current | 350A continuous (500A peak) |
| Temperature Range | 14°F to 140°F (-10°C to 60°C) |
| Weight | 0.9 lbs (410 g) |
| Display Size | 2.32 x 2.32 x 0.78 in (59 x 59 x 20 mm) |
| Cable Length | 13.1 ft (4 m) |
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