Solar panels in Bismarck, ND

Roofs in Bismarck get about 1,597 hours of usable sunlight a year — more than 64% 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 Bismarck → City averages are a starting point; your own roof's size, pitch and shading change the answer a lot.

What a typical Bismarck solar system costs

A 20-panel system (8 kW) is about right for an average Bismarck home using 10,800 kWh a year. It would produce roughly 10,860 kWh annually and offset 100% of that usage.

How we worked this out for Bismarck

Every number on this page comes from these seven steps. Nothing is a national average — the sunlight figure is measured from Bismarck rooftops.

Step 6 matters more than it looks. Only 35% of what a system this size produces in Bismarck is used the moment it is generated; the other 7,080 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 — 13.2 years against the 13.3 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), $2.85/W installed, 10,800 kWh typical annual household use, 11.1¢/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 Bismarck gets 1,597 sun hours

That figure comes from Google's analysis of real rooftops across Bismarck — it already accounts for shading from trees, chimneys and neighbouring buildings, which is why it's lower than the raw "hours of daylight" figures you'll see elsewhere. An unusually open, unshaded roof in Bismarck reaches about 1,642 hours, roughly 3% better than typical.

The numbers behind this page

When Bismarck actually produces

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

That is a severe seasonal swing — Bismarck produces roughly 4.4× as much in Jun as in Dec. A system sized to cover your annual usage will overproduce badly in summer and fall well short in winter, so how your utility credits exported power matters more here than in most places.

The annual total is measured from Google's rooftop imagery. Its split across months is calculated from solar geometry at Bismarck's latitude, not separately measured, so treat the monthly figures as the shape of a typical year rather than a forecast.

How Bismarck compares to the other 788 cities

What actually stands out about Bismarck:

• Plenty of roof to work with. Typical roofs here fit around 110 panels — roughly 5× what an average home needs. Roof size will not be what limits your system in Bismarck.
• Large roofs. At a median of 379 m², Bismarck has the 37th-largest typical roof footprint we've measured.
• Every kWh counts more here. The grid serving Bismarck emits 832 kg CO₂ per MWh, among the highest of the 788 cities measured — so the same panels displace more emissions than they would elsewhere.
• Sunnier than the rest of North Dakota. Bismarck roofs get 6% more usable sunlight than the typical North Dakota city we've measured — statewide averages will understate what you can expect here.
• Cheap electricity is the headwind. North Dakota power costs about 11.1¢/kWh. Low rates are good news generally, but they lengthen solar payback — there is simply less bill to displace.
• Older imagery. Google's aerial capture of Bismarck dates from 2012. Tree growth and new construction since then are not reflected.

Cities with almost the same sunlight

These are the closest matches to Bismarck's 1,597 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 North Dakota → statewide sunlight, rates, incentives and every city we've measured.

Bismarck solar questions

Worth reading before you buy

Estimates only, generated 2026-08-22 from Google Solar API rooftop samples and average North Dakota 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.