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Re: Solar Conundrum
Ah, now you want efficiency as well.
That wasn't part of the original request. Again it comesback to asking the makers how their equipment will behave. If twin MPPTs won't have an issue with load adjustment, efficiency becomes a matter of price. Might be an issue, but wasn't presented as a concern here.
If the makers say "that" equipment is the only way to go, again, efficicency isn't an issue.
Is it something to consider? Sure. But the primary question is, what can do the job? At all, at any price, under any conditions?
Then the choice of solutions (as opposed to "there's no way to do that") can be weighed.
"The ideal way would be to a little box of electronics that would drop the 50v down to say 14v "
Wait, didn't I already say a couple of simple regulators with bootstraps CAN do that? And easily be built if not available on the shelf? Of course today, you could use a DC-to-DC converter to make that more efficient, there's all sorts of IC controllers to do that on the shelf.
Easiest solution is rather obviously to add a second "12" volt panel array, but that also wasn't part of the original question. I'm sure the OP had reasons not to ask it.
Last edited by hellosailor; 07-27-2012 at 11:54 AM.