Posted by LJD on November 28, 2012 at 09:56:50 from (75.251.72.147):
In Reply to: Battery maintainer posted by pony bh on November 28, 2012 at 06:30:40:
You don't need an expensive setup like that. It's a waste of money. All you need is a 10-12 watt, 12 volt solar panel hooked directly to the battery with no other electronics. It's cheaper, weather proof, and is all that is needed when charging a full size battery. I have several trucks and tractors with 12 watt panels hooked to them. My old Allis Chalmers HD6 with a 24 volt system has dual 12 watt panels hooked in series. Been that way for 5 years now.
You can buy brand new 10-12 watt, 12 volt panels for $40-$50 if you shop around (with free shipping). Sometimes even cheaper.
A 12 watt panel can only put out 8/10ths of an amp max in the brightest sun and most of the time it will be less then half-and-amp. No controller needed. Even 15 watt panels don't need controllers unless you live somewhere in the southwest where the sun is really bright almost every day.
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