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The battery will be used for both peak shaving and in the case of an outage for grid backup. I do have experience with building different sizes of Lithium packs, for solar LiFePO4 is indeed the one I was going for. I'm missing the knowledge in inverters, this includes inverter <-> battery...

Hi, I have been following this thread for a while now and would like to hop on to ask and share along. I am interested in on/off grid hybrid inverters & AC coupled batteries. Right now I'm stuck with a few options and would like opinions on my following product selection: Must inverter...

That's a good deal. Who doesn't like affordable luxuries :) If you only use the grid backup once in a while, dumb batteries are indeed no problem. There are tons of systems running for quite a long time on dumb / lead acid when they make low cycles. Easier to get your hands on those too. Which...