The Admin's Blog

By Pianotuna

Hi all,

 

Here is a simple flow chart.

 

Budget–>Energy Audit–>Battery bank size–>number of watts–>PWM or MPPT. What ever type of controller is chosen, make sure it has adjustable voltage set points and a temperature probe that is on the battery.

 

If you use solar as a battery charger, one rule of thumb is between 60 and 150 watts of panels per 100 amp-hours of storage. The smaller the battery bank the higher the wattage needed (per 100 amp-hours). Here is a link to the rather special spreadsheet which includes an energy audit, that N8GS has created to help size solar battery charging systems!

 

https://www.dropbox.com/s/ziwfjk5dnt375cs/Solar%20system%20sizing.xlsx?dl=0

If you full time or use an inverter lots, then populate the entire unshaded area of the roof with panels. I’m considering replacing my awning with solar panels.

 

For a nice explanation of solar, try this link:

 

http://www.jackdanmayer.com/rv_electrical_and_solar.htm#The%20Golden%20Rules

 



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