On Thu, 26 Jul 2007 03:35:18 -0000, Skip Gundlach
wrote:

We have as a target of never letting our batteries get below 75% - and
only rarely below 90%.

That is unrealistic. It takes too long to charge batteries above the
80 to 90% level because charging current must be tapered down.

Much more realistic is to run your batteries between 50% and 80%. That
requires a good 3 stage charging system capable of supplying 25% of
your capacity during the bulk charge stage.