On 5/14/19 9:33 AM, Dave Cole wrote:
I've been planning to put up an array on my roof. But I have plenty of
space so I may do a ground level install.
It would be a lot easier to maintain.
FLA batteries seem to be the general recommendation for a constant use
residential install.
In my opinion, lead-acid batteries of any format are far inferior to
lithium. LA batteries need to be at full charge most of the time or they
will degrade and with good management will only last about 5 years. I
ended up running my generator to charge my FLA batteries in the evening
if the solar had not brought them up during the day. So I ran the
generator most days. Lithium batteries don't like to be fully charged so
now I don't need to worry about topping up before I go to bed. Lead-acid
batteries typically have a cycle life in the hundreds of cycles where
lithium battery cycle life is in the thousands or more, and end up being
cheaper in the longer term. On the other hand, Lithium batteries are
easy to kill if they are over or under charged, so a proper battery
manager/protector/balancer is a must. Otherwise they have a wide charge
range and don't mind be anywhere within that range. I have been using
these with good success for a while:
https://kit.com/jehu/lithium-battery-sources-july-2018/1274926-johnson-controls-24-
https://www.mobile-solarpower.com/solar-charge-controllers.html
(Epever 40 amp)
I've had chargers trash batteries when they failed. I sure wouldn't
want that to happen to $10K worth of Lithium batteries!
Weight isn't an issue.
Dave
... snipped to end
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