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Author: Subject: Solar System Energy Storage
ncampion
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[*] posted on 6-1-2016 at 01:07 PM


Thanks for the link, looks very interesting, I have submitted an inquiry to get more info. Maybe the Li technology has come of age!



Living Large in Loreto. Off-grid and happy.
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Fastbird
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[*] posted on 6-2-2016 at 10:33 AM


Since I asked solar energy storage, I have read a lot about different sizes of Lithium type batteries and the need for a BMS ( battery management system). Each 3.2 volt cell seems to need individual control to keep the cell voltages balanced and from going too high or too low. You can buy lithium type batteries at 3.2 volts with up to 700 AH and then wire them in series for your system voltage. There are also cells bundled to get a battery with 12 or 24 or more volts, but you need many to get adequate AHs.
Some folks refer to the Tesla Power wall, but look at the specs, they are designed for grid tie systems where the input voltage from the panels is in the 400 volt range and then you need an inverter that take 400DC and puts out 120/240 AC.
It looks to me like an expense of $8000 plus for a lithium battery bank to be equal to my lead acid 880 AH bank.
So which lithium type battery to buy?? And what BMS to hook up to it?
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