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Q. Will the solar panel provide enough power to run my car fridge?
A. Most portable compressor fridges use between 20-72 Amp hours of power per day (24hrs)
depending on model and temperature. Since solar panels only produce their peak power for
about 8 hours per day you would need approximately a 30 to 110 Watt solar panel to keep up
the power being used by the fridge. Although a 5 or 12 Watt solar panel will not keep up with
the power being used by the fridge it will help the battery to last longer.
Q. What current output can I expect?
A. The current output (mA) of the solar panel is based mostly on the available solar energy
(sun rays). The current ratings (Peak Power) given in the specifications table are based on the
‘ideal’ sunlight conditions. In reality this may be achieved only on a very bright sunny day. The
normal current output will therefore be a little lower. If the panel is shaded or if it is a very hot
day the output will decrease further.
Q. Will it charge my flat battery & how long will it take?
A. The SPA400 & SPA900 are designed for ‘topping up’ and maintaining batteries only. If placed
on a flattened battery it is unlikely to fully recharge the battery (except small batteries) however
it may put some charge into the battery if given sufficient time.
Q. Can I run more than one solar panel?
A. It is possible to run multiple solar panels for higher voltage applications or for more power:
1. Placing 2 solar panels in ‘Series’ will make them suitable for use on 24V battery systems
or vehicles.
2. Placing 2 or more panels in ‘Parallel’ will still make them suitable for 12V use but will provide
twice as much power (current).
If you wish to use multiple panels, you will need to make the electrical connections as per the
following diagrams:
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