Solar Energy Australia - Battery Life Using an Inverter
QUESTION: How long will my Battery last using an inverter? Here is a simple formulae to help you work out how long your fully charged battery will last. In this formulae the following is assumed: AC Watts = figure written on the rating label of the AC (240) appliance. Watts = Volts x Current (Amps) Ah = Ampere Hour capacity of the battery. DCI = DC Current drawn by the appliance. Only 50% of the batteries capacity will be used to allow it to recover.
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For example, a 16 inch TV running on 130AH battery has an AC draw of 67 Watts.
If you recharge your battery during this time with solar panels or driving the vehicle, then the time will be extended. |
Use a figure of 20 if your battery voltage is 24v DC.