cool thanks is there a specal battery i should use i was going to use opttima battery is that ok?
Make sure you buy a deep cycle battery not a starter battery.
Deep cycle batteries are rated in amp-hours (ah). For example a 100 ah battery will provide 1 amp over 100 hours, 2 amps over 50 hours, 4 amps over 25 hours etc. The bigger the battery the longer you can run devices. The bigger the solar panel the faster it will recharge the battery(s).
For comparison purposes I have a 4D (200 ah) aux battery. Here is what I estimated the daily draw (24 hours) to be for my electrical systems.
ah Number of hours Total amps used
Refrig. 3E - 2.7CF 2.5 16 40
LED lights .3 5 1.5
Espar D5 3.0 2 6
Water pump 4.0 1 4
CO2/CO detector .1 24 2.4
Blue-Sky controller .017 24 .4
Stereo 7 3 21