Solar panel size calculator
Battery size calculator
Cable size calculator
Power output calculator
Calculates the minimum recommended battery bank size in amp-hours (Ah).
Calculation is based on the power consumption of the system, voltage, target depth of discharge and desired length of backup power required. Enter the daily power consumption in Wh and check the other data (change if necessary).
Please remember that this calculator works out the 'minimum' battery bank size for a given power consumption. When using an inverter, the current draw on the battery side can be extremely high, so you may need a battery bank that is larger than the minimum. For example, 1200W drawn at 240V is only 5A, whereas at 12V this current increases to 100A. We recommend that you have a battery bank of at least 220Ah per 1000W and preferably 300-400Ah.
We have a range of hard-working 12V deep cycle batteries from Trojan and Platinum for your renewable energy system. Although many leisure batteries are described as deep cycle, we do not supply these, as they are not designed for heavy use.