150A Battery Watt Meter

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Ever wondered how much power was being drained from your battery? It's often difficult to measure this without special equipment or expert knowledge - until now.

Enter the Battery Watt Meter, a simple device that is easily installed and provides you with all the key ratings of your battery loads in real time.

Installation is easy - the watt meter has two ring terminals for connecting to your battery, and an anderson plug for loads. The device is installed in-line between your battery and loads. Once there is power flowing through, the device will initialise and show you a full range of ratings including:

  • Current (Amps/A) at the present moment
  • Voltage (Volts/V) at the present moment
  • Power (Watts/W) at the present moment
  • Total Amps (Amp hours/Ah) since device initialised
  • Total Power (Watt hours/Wh) since device initialised
  • Highest Voltage Maximum (Vm) since device initialised
  • Highest Power Peak (Watt Peak/Wp) since device initialised
  • Highest Current Peak (Amp Peak/Ap) since device initialised

The Battery Watt Meter only requires a tiny 7mA draw to operate, so there will be no significant reduction in your power production during usage.


150A Battery Watt Meter has a rating of 4.80/5 based on 10 reviews.

Watt meter

Works very well, good value

on 14 November 2018

Very Happy With the Product

Delivered quickly, works well, exactly as promised. Very happy with the product

on 13 June 2018

touring setup

I have purchased a two battery pack with the watt reader and so far its been pretty good. these batteries take quite a beating when i run my inverter and still hold up really well.

on 21 May 2018

Giant battery 130 amp and monitor

Both items are excellent and working well.

on 18 January 2018

Keeping an eye on things

Great tool for keeping an eye on whats going on the your battery

on 21 December 2017

Solar & Battery Kit

Quick and easy purchase kit runs my fridge and lights comfortably for a weekend camping trip

on 6 December 2017


Arrivesd on time but the casing around the item is already cracked

23 November 2017

150 A Battery Watt Meter

I am putting together my off the grid power source for my ute when away camping. My ute is fitted with a dual system which I use for the daytime when fishing or touring but come nighttime and back at home base I use my 120 A deep cycle battery (nestled into a Kick Ass battery box) which I have either in the back of my ute or in camp hooked up to my 200 Watt solar panel. I always knew what went in but never what goes out. So researching I went back to my favourite store. Kick Ass. It's my favourite because I like the name and whenever specials are on I have already bought the item a few months before so I kick my ass for being hasty. Now I know the total going in at all times and how much is going out at any given time. Since having this meter installed between my battery and 3 Anderson plugs I never get caught short. Thanks guys, great gadget at a great price. Bet you they will now go on special.

on 15 June 2017

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150A Battery Watt Meter Specifications
Safe Operating Voltage 0V - 60V
Safe Operating Current 0 - 100A Intermitten
50A Continuous
Note: this assumed the device's writes are in free air, and attached to connections at or below temperature of 35C with adequate air flow. 100A operation time depends on ambient and wiring temperatures.
Nominal Operating Conditions 0C - 50C ambient air temperature, non condensing humidity
Note: Max temperature must be reduced at max current rating.
Measurement Update Period 400 mS
Data Queue Sequence Time 2 seconds
In Circuit Resistance 0.001 Ohms
Operation Current 7mA
Auxiliary Power Voltage 4.8V - 60V
eg. from a receiver battery
Dimensions Approx. 200mm L x 42mm W x 25mm D (including anderson plugs)
Approx. 85mmL x 42mmW x25mmD (only watt meter unit)
Weight Approx 130g
Display Screen 16 Character x 2 row STN LCD
Battery Watt Meter Measurement Parameters
Voltage 0 - 60V, 0.01V Resolution
Note: 0V min. w/auxiliary power, eg. a receiver battery. Otherwise, 4.0V
Current 0 - 150A peak, 0.01A Resolution
Note: 65A continuous
Power 0 - 9000W, 0.1W Resolution
Charge 0 - 65AH, 0.001Ah
Energy 0 - 9000Wh, 0.1Wh Resolution


2 year general warranty - 2 year warranty - repair of replacement warranty for construction or components

For more information, please read our full warranty policy

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