steffen bertelsen wrote:I live in Saskatchewan (next door to Manitoba) in an off-grid house with a cistern in the crawlspace which is kept above freezing from an annualized geo-solar system which takes hot air from the attic space and stores the heat under my house. I have a black metal roof and there is rarely snow that stays on the roof for more than a week. Although it will still be below freezing outside, the black metal gets warm enough to melt the snow. Having some heatline like this http://www.heatline.com/kompensator.php in the gutters and downspouts will allow the melted snow to be collected inside the house for storage. This can be run from an off-grid PV and battery system which will only turn on when the sun is shining and melting snow anyway. You would have to do some calculations of the precipitation vs water usage to determine the roof area needed to collect enough water. I would guess it would be a lot of roof area/person and a storage tank to get through the winter. Best option would be to diversify your water sources (well, rain/snow, water truck delivery) and use rain/snow as mush as possible to save costs and pumping power.