ACOPower 500A Battery Monitor | High and Low Voltage Programmable Alarm | Voltage Range 10V-120V

The ACOPower 500A Battery Monitor Shows Exactly How Much Energy Is Left in Your Battery Bank

The ACOPower 500A Battery Monitor works like a fuel gauge for your batteries. A precision shunt measures every amp going into and out of the bank, and the display shows voltage, charge and discharge current, power in watts, remaining capacity in amp hours and percent, and the estimated time remaining at your current load.

It works with battery banks from 10V to 120V, currents up to 500 amps in either direction, and capacities up to 9,999Ah, so the same monitor fits a 12V RV bank, a 24V boat system or a 48V home storage bank. Programmable high voltage, low voltage and low capacity alarms warn you before a problem damages your batteries.

ACOPower 500A Battery Monitor Features

Full Battery Picture at a Glance

The display shows voltage, current, power, remaining amp hours, state of charge and time remaining, so you can see how your system is performing and plan your energy use.

500A Shunt

The included 500A shunt installs in the negative battery line and measures both charging and discharging current up to 500 amps.

10V to 120V Range

Monitor 12V, 24V, 36V, 48V and higher voltage banks up to 120V, with capacities up to 9,999Ah.

Programmable Alarms

Set high voltage, low voltage and low capacity alarms to warn of overcharging, deep discharge or a nearly empty bank.

Accurate and Efficient

Voltage, current and capacity readings are accurate to ±1%. The monitor draws only 10 to 15mA while working and 1 to 2mA on standby.

Panel Mount Display

The compact 100 x 61 x 17 mm display mounts in a 94 x 57 mm panel cutout, and a 20 ft cable lets you place it well away from the batteries.

Real-World Applications

RVs and vans. Know how much battery is left before turning on the microwave or heading to bed.

Off-grid solar. See how much your array is putting back each day and how much you use.

Boats. Keep track of house battery use at anchor.

Lithium upgrades. Get a true state-of-charge reading that voltage alone cannot provide for LiFePO4.

How It Compares to Common Alternatives

Versus a voltmeter. Voltage alone is a poor guide to state of charge, especially with lithium batteries that hold a flat voltage. A shunt monitor counts actual amp hours.

Versus Bluetooth monitors. App-based monitors need a phone to check. This monitor has a dedicated display that is always visible.

Is This Battery Monitor the Right Fit

• System voltage. 10V to 120V battery banks.
• Current. Up to 500A charge or discharge through the shunt.
• Mounting. A panel cutout of 94 x 57 mm for the display, and space near the battery negative for the shunt.
• Wiring. All loads and chargers must connect through the shunt for accurate readings.

This may be a good fit if

• You want to know your true state of charge
• You run lithium or lead-acid batteries off grid
• You want alarms before batteries run too low
• You have a 12V to 48V system

Common Questions

Where Does the Shunt Go?

In the main negative cable between the battery bank and everything else, so that all charge and load current passes through it.

Does It Work With Lithium Batteries?

Yes. It measures current and voltage, so it works with LiFePO4, lead-acid and other chemistries.

What Capacity Can It Track?

Up to 9,999Ah.

How Much Power Does It Use?

10 to 15mA while working and 1 to 2mA on standby.

What's Included

• 1 x ACOPower Battery Monitor display
• 1 x 500A Shunt
• 1 x 20 ft Cable
• 1 x 3 ft Battery Cable
• 1 x Operation Manual

Know Your Batteries, Use Them Better

The ACOPower 500A Battery Monitor turns your battery bank into an easy-to-read fuel gauge with alarms that help protect it. 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.