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Solar Potential in Lac Ste. Anne County

Lac Ste. Anne County sits in a part of Alberta where summer sun is generous and winter sun is not. Regional NASA POWER-style figures for this belt are about 5.2 kWh/m²/day in high summer and about 1.4 kWh/m²/day in mid-winter. Those irradiance figures are regional estimates consistent with NASA POWER-style values for this part of Alberta, not a measured year on your roof.

That winter number is the one that sizes batteries, not the July brochure.

Tree cover is heavier than on open prairie counties. Clearing for a food forest and clearing for winter solar are two different cuts — plan both before you drop trees.

Why county solar is not a system quote

Irradiance is energy hitting a horizontal square metre. A real array has tilt, azimuth, snow, soiling, inverter losses, and shade. Two parcels a kilometre apart in Lac Ste. Anne County can differ more from trees and roof geometry than from climate.

Use the county figures this way:

• **Summer ~5.2 kWh/m²/day** — enough for pumping, drying, and topping a battery if the array can see the sky.
• **Winter ~1.4 kWh/m²/day** — the design case for lights, well pumps, and heat-adjacent loads if you are off-grid.

A grid-tied system near Onoway can lean on the summer surplus. An off-grid cabin in Lac Ste. Anne County has to live on the winter number or on a generator.

Shade, snow, and chinook

Walk the site on a low-sun day if you can. Mark:

• Conifers on the south and west lines
• Future shelterbelts you already want
• Roof valleys that hold snow
• A south slope versus a north bench

Lac Ste. Anne County is not the desert, but it is not coastal cloud either. Snow slides off a steep enough rack after a chinook more readily than after a still cold week. Design the rack for both.

A simple sizing sketch (not an electrical design)

For a household that uses 10 kWh/day in January:

• Start from 1.4 kWh/m²/day.
• Apply a 0.7 system factor for cold, snow, and wiring (a conservative sketch, not a code calculation).
• You need on the order of 10 / (1.4 × 0.7) square metres of effective array — then add battery days and a backup plan.

If that area does not fit the south roof, you need ground-mount, load cuts, or a hybrid. The free parcel report will not replace an electrician, but it will show whether the land even faces the problem honestly.

Hardiness and frost-free days (about 100 in this county) also matter: a food-garden pump in May is a different load than a heated shop in January.

See this for your specific parcel

Generate a free land report for a property in Lac Ste. Anne County →

Common questions

Is winter solar enough in Lac Ste. Anne County?

Winter irradiance here is low. Grid-tied systems still work. Off-grid systems must be sized on the winter number or paired with a generator.

Should I clear trees for solar in Lac Ste. Anne County?

Only after you map December shade and any shelterbelt you still want. Clearing is a design choice, not a default.