Off-Grid Solar Systems in Alberta

How this works in Alberta

Off-grid solar is how a site without a pole still runs. Size it for December, not the July brochure.

Off-grid solar in Alberta is sized on December, not July. Mid-winter irradiance is roughly a sixth of summer across most of the province, so a system that comfortably runs a cabin in summer can run short for weeks in winter. Most year-round off-grid homes pair solar with a battery bank and a generator.

Start from a load list in watt-hours per day, then size the battery for the days of autonomy you want and the array for the winter number in your county. Steep panel tilts shed snow and catch the low winter sun. Our county solar guides and the solar-by-county table give the summer and winter figures to plan with.

An off-grid system must carry the property through the darkest weeks of the year on its own. In Alberta that is the design problem: NRCan's indicative monthly values for Edmonton put December output at latitude tilt at about 58 kWh per kW of panels, against 120 in June. A system sized on annual averages will run short in winter.

Common responses are steeper panel tilt (in NRCan's Edmonton data, latitude +15° gives 63 kWh/kW in December), a larger array, a larger battery bank, cutting winter loads, and a generator for long cloudy spells. The package scope already includes generator integration for this reason.

Because there is no grid connection, the micro-generation process (Form A to a distribution owner, bi-directional meter, retail credits) does not apply. That process exists for connecting generation to the grid. The electrical work still needs a permit and inspection, and the AUC recommends certified electrical contractors for generating installations.

Keep electric heating, well pumps and other heavy loads in view during the load analysis. Electric space heating is a large winter load; consider another fuel for heat and size the system on what remains.