Quote:
Originally Posted by I.C.D
G’Day Glen
I have two 6 volt 200 amp hours in series about 6 years old and one 12 volt deep cycle 100 amp hour 6 months old, both batteries are on different circuit .The lap top on charge drawing about 4 amps
Ian .C
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Hi Ian.
Are you sure the cells are fully charged (~13.6V on charge and ~12.8V off) before and when you load them up?
A healthy 80W panel outputs ~4-5A max. in direct sun, so it'll be struggling to keep up with demand if you're using the battery bank regularly and/or for extended periods. (Or after extended cloud cover.)
And I also second the suggestion you upgrade to a pure sine wave inverter. Mod sine can play merry hell with some devices, including charger/PSUs.