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Solar Panels / Absorption Fridges
Hi – might be a bit late on this – the following sums may assist:-Power in Watts(W) = current in Amps (A) x Voltage in Volts (V)
Energy in Watt hours (Wh) = power in Watts (W) x time in hours(h)
Battery capacity in Amp hours (Ah) = energy in Watt hours / Voltage in Volts (V)Your wattage = 9*12V = 108W. Thats a big call for a campervan
If your leisure battery is 110Ah then if fully charged it should last for 12.2hours (110/12). However I would get a local garage to test your battery, many leisure batteries say they are 110 given this is an industry size but they may skimp on the lead content and have a lower output – you might want to think about 2×110 batteries with a split charger if your going to run the fridge off your batteries.
Although the fridge may say 9A – that’s the max it will use if its in defrost mode or your constantly going in and out of it, so the average consumption will be lower than this.
Even so to produce 9A for one hour you’ll need at least 100W and given inefficiencies and not direct sunshine then you’ll be looking the biggest you can get say 150W.
Unfortunately absorption fridges are very hungry on power, whereas the compressor type are less so. I hope you manage to find a solution.
Hope this helps
Solar Panels / Absorption Fridges
Hi – might be a bit late on this – the following sums may assist:-Power in Watts(W) = current in Amps (A) x Voltage in Volts (V)
Energy in Watt hours (Wh) = power in Watts (W) x time in hours(h)
Battery capacity in Amp hours (Ah) = energy in Watt hours / Voltage in Volts (V)Your wattage = 9*12V = 108W. Thats a big call for a campervan
If your leisure battery is 110Ah then if fully charged it should last for 12.2hours (110/12). However I would get a local garage to test your battery, many leisure batteries say they are 110 given this is an industry size but they may skimp on the lead content and have a lower output – you might want to think about 2×110 batteries with a split charger if your going to run the fridge off your batteries.
Although the fridge may say 9A – that’s the max it will use if its in defrost mode or your constantly going in and out of it, so the average consumption will be lower than this.
Even so to produce 9A for one hour you’ll need at least 100W and given inefficiencies and not direct sunshine then you’ll be looking the biggest you can get say 150W.
Unfortunately absorption fridges are very hungry on power, whereas the compressor type are less so. I hope you manage to find a solution.
Hope this helps
