1) Solar PV + battery storage is the only real option for the off-the-grid electical home, and you'd want maximum power output per roof area. The best option f

1) Solar PV + battery storage is the only real option for the off-the-grid electical home, and you'd want maximum power output per roof area. The best option for PV is monocrystalline Si panels, produced almost entirely in China with proprietary technology. Lifetime is basically indefinite as well, >30 yr, and they contain no heavy metals so recycling is not much of an issue. Battery technology for home use is more variable, but LiFePO4 (lithium iron-phosphate) is probably the optimal tech at present (cost is relatively high, recycling is not much of an issue as there's no toxic heavy metals involved). 2) A properly designed PV-battery system has little fire risk, and probably less than a tank full of gasoline or diesel fuel or pressurized propane gas (which go off like bombs during wildfires). You also have to consider whether or not a grid-tied system or a completely off-the-grid system is the optimal choice. This depends a lot on local utility policy (net metering means you get paid as a power provider if you're feeding more power to the grid than you use), and whether or not you want reliable power if the grid goes down, i.e. can you disconnect from the grid and just use your battery bank for power at night, and so on. A reputable installer will have answers to these questions for your local area.