Does anyone have a good tutorial or a site that sells a off-grid small kit (600Wish with 1-2kWh battery) with battery backup? I want to get one for my house if

Does anyone have a good tutorial or a site that sells a off-grid small kit (600Wish with 1-2kWh battery) with battery backup? I want to get one for my house if its affordable enough as an insurance on top of a generator.