|
Alex, those batteries seem to be automotive types. Those are the ones whose output it usually rated in terms of CCAs (i.e. cranking amps). These are 770 which puts them at the higher end of the auto range such as you might use on a larger family car or something similar.
That makes them fairly unsuited to use as storage for solar power.
Also worth noting is that an unregulated solar panel of a nominal 12 volt DC output will actually deliver closer to 19-20 volts DC of open circuit power. Have a look on the back of the panel and the numbers should be there.
Most 12 volt batteries have a recommended charging range which may go as high as 14 volts but no higher. Manufacturers will usually recommend that the charging voltage not exceed that range otherwise the battery will be damaged.
I therefore would urge you to reconsider your "no regulator" plan. It would almost certainly end in tears.
Peter
|