Hi, thanks for the question - The fuel source intended for the Volo Engine is some type of biomass - for the biomass the plan is to use a gassifier to get the h

Hi, thanks for the question - The fuel source intended for the Volo Engine is some type of biomass - for the biomass the plan is to use a gassifier to get the heat out of the biomass. Solar is a good possibility, but not enough solar in the northern part of the US to make enough heat.