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I lived off grid for years and started with 12 volt battery bank 12volt panels and 12 volt system with an inverter to get 240volt. Also a 7.8 kva gennie to pick up the shortfall.
In the end I scrapped the panels and used 24 volt ones in series to get 120 volt dc. This fed an 60 amp inverter charger and the batteries were 48 volt at 445ah.
I was speaking to my mate the sparkey who does a lot of off grid and grid tie systems and now the way is a different type of inverter charger that lets you use power dirrectly off the panels without using the batteries which trickle charge from the grid tie and only get used at night so the batteries dont get a constant hammering from big loads and when the power goes off theres a disconect circuit so you can use batteries. Its all changed in the period of about 10 years but you pay for it. Tesla is probably the dearest so it does pay to shop around.
Good luck
Andy
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