The Legalett air heated floor system can run either with electricity or gas. Gas systems have a boiler and water coil in the heater box, where electric systems have an electric coil. So as far as the Legalett system is concerned, it just needs you to provide hot water one way or another. They don’t supply boilers or other water heating equipment as part of the heating system. One option that Legalett does provide are solar panels to preheat air for the system, which can be done with gas or electric units and it may be a great solution for you in this case. See this video about it -
Solar air heated radiant floor
That Install video is from our latest demonstration house, and the solar panels are expected to contribute over 70 percent of the heat load simply by running two fans, which can be done with PV panels. Heating is the biggest hurdle with off grid houses, other solutions are burning biomass in a wood burning stove, a masonry heater, or even a non electric pellet stove. But whatever you do, first minimize heat loss by building super efficient, and if possible incorporate passive solar heating. As for radiant floor heating, a solar air heating panel is nothing but an empty box with a black front that you blow air through to collect solar heat, so the panels are much cheaper than photovoltaic.
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