When you test a wet cell battery with a hydrometer, you are measuring the amount of sulfuric acid in the electrolyte. If your reading is low, that means the chemistry that makes electrons is lacking. So, where did the sulfur go? It is pulled to the battery plates during discharge and re...
If I was building an off-grid/grid-coupled system for myself I'd probably use a single string of lead-acid batteries to provide 120V DC and look at rewiring the house to install extra "battery" sockets fed from that string via a conditioning and regulating controller. A lot of modern de...