How does one calculate power requirements in terms of solar/battery backup systems

There are basically three ways to calculate the power and energy requirements of a solar power / backup battery system.

    1. From your monthly electricity bill. The total amount of energy used per month will give you an indication of how much energy needs to be generated by a solar system
    2. Install an energy logging device, this device will tell you the peak amount of power drawn at once, and the total energy consumed per day and per month. These devices are widely available to buy online, one good example is the Efergy Energy Logger.
    3. Download and complete our “Energy Usage Calculator” This can be completed and emailed back to us. Click here to download our “Energy Usage Calculator.