Solar panels in Truro, NS

Roofs in Truro get about 1,143 hours of usable sunlight a year — less than 80% of the cities we've measured. Here's what that means in cost, savings and payback, using real rooftop data rather than a national average.

Check your specific roof in Truro → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.

What a typical Truro solar system costs

A 28-panel system (11.2 kW) is about right for an average Truro home using 10,800 kWh a year. It would produce roughly 10,881 kWh annually and offset 100% of that usage.

How we worked this out for Truro

Every number on this page comes from these seven steps. Nothing is a national average — the sunlight figure is NASA satellite data for Truro itself.

Step 6 matters more than it looks. Only 35% of what a system this size produces in Truro is used the moment it is generated; the other 7,101 kWh is exported and credited one-for-one under net metering. Because exports here are credited at or near retail, that split changes the payback very little — 16.0 years against the 16.1 we show. In places where exports pay a fraction of retail the same split moves payback by years, which is why we model it explicitly rather than assuming.

Assumptions: 400W panels, 15% system losses (inverter, wiring, heat, soiling), CA$2.85/W installed, 10,800 kWh typical annual household use, 18.3¢/kWh electricity. Change any of those and every figure above moves — which is exactly why a single national "solar costs X" number is misleading.

Notice that payback barely improves as systems get bigger, and eventually gets worse. That's because you can only save money on electricity you were going to buy anyway. Once a system covers your usage, extra panels mostly generate exports at a much lower rate.

Why Truro gets 1,143 sun hours

That figure comes from 25 years of NASA satellite measurements of sunlight reaching the ground in Truro (2001–2025). It is the energy a panel actually receives, which is why it's lower than the raw "hours of daylight" figures you'll see elsewhere, and we take 8% off for a typical roof's mix of direction and shade. A flat, completely open surface in Truro gets about 1,242 hours.

The numbers behind this page

When Truro actually produces

Annual totals hide the thing that catches people out: 39% of Truro's yearly sunlight arrives in May–July, and just 11% across November–January.

Truro produces about 4.0× as much in Jun as in Dec — a normal mid-latitude swing. Expect real winter shortfall and summer surplus rather than steady year-round output.

The annual total comes from NASA POWER satellite data (2001–2025 average). Its split across months is calculated from solar geometry at Truro's latitude, not separately measured, so treat the monthly figures as the shape of a typical year rather than a forecast.

Cities with almost the same sunlight

These are the closest matches to Truro's 1,143 usable sun hours from other states and provinces. Same sunlight, different electricity prices — which is usually what decides whether solar is worth it.

Nearby cities

See all of Nova Scotia → statewide sunlight, rates, incentives and every city we've measured.

Truro solar questions

Worth reading before you buy

Estimates only, generated 2026-08-22 from NASA POWER sunlight data and average Nova Scotia electricity rates. Not a quote and not financial advice. Your roof, usage, utility plan and local incentives will change these numbers — get real quotes before buying.