Quote:
Originally Posted by JethroBodine
Two in parallel is ok, big rigs use up to 4 in parallel for starting.
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OK I guess if you're going to buy a matching set and always use them together.
But when one of them develops an issue - no battery lasts forever - the other(s) will sacrifice themselves to support the lame one. Big rigs need starting power. A substantial need but not same as what we need. Ask some serious deep cycle users or the manufacturers.
Anyway, you need SOME additional battery capacity for long coasts with lights and/or fan. You need LOTS of deep cycle capacity to run a car without alternator for many hours. There are many good solutions for both scenarios.