Havent done a power audit for the new house yet, but there wont be much more electricity use than in the cabin, but i'll be adding more panels and batteries regardless. Wife is the one to convince about drinking rain water, but i might have her convinced with the Berkey. The cabin roof collects just enough rain water for our cleaning purposes, so i will need the to-be-built house roof and cistern to collect enough rain for drinking water :)