Scenario: a $300/month electric bill. Assumes 3%/yr rate increases, 0.5%/yr panel degradation and no federal tax credit (the 30% §25D credit ended for systems installed after Dec 31, 2025). How we calculate
Data approachEIA rates · NREL sun hours · 2026 federal policy · methodology
A $300/month electricity bill in North Dakota represents roughly 2,427 kWh per month at the state average rate of 12.36¢/kWh (EIA, Jan–Jul 2026 year-to-date). With 4.5 peak sun hours per day, offsetting that usage takes about a 21.6 kW solar system — roughly 54 panels at 400W — costing about $64,900 installed. Because the 30% federal tax credit ended for systems installed after 2025 and North Dakota has full retail net metering, simple payback is about 20.7 years, with an estimated $41,900 net over 25 years.
How Many Solar Panels for a $300 Electric Bill in North Dakota?
North Dakota electricity rates and sun hours change the math versus the US average. The sizing formula:
System size (kW) = Annual kWh ÷ (Peak sun hours × 365 × 0.82)
For a $300/month bill in North Dakota:
Annual usage: ~29,126 kWh/year
Peak sun hours: 4.5 h/day (North Dakota)
System size:21.6 kW DC (~54 × 400W panels)
Metric
North Dakota
US average
Rate
12.36¢/kWh
18.19¢/kWh
Sun hours
4.5 h/day
4.5 h/day
System size
21.6 kW
14.7 kW
Panels (400W)
54
37
North Dakota requires a larger system than the national average for the same dollar bill because higher consumption at lower rates. Use our solar system size calculator with your ZIP code for a roof-specific result.
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💰 System Cost
What Does Solar Cost for a $300/Month Bill in North Dakota in 2026?
At about $3.00/W installed (a blended 2026 US price; marketplace quotes often run lower), a 21.6 kW system in North Dakota costs about $64,900.
The 30% federal Residential Clean Energy Credit (IRC §25D) ended for systems installed after December 31, 2025, so a solar system you buy and install in 2026 gets no federal tax credit. Leases and PPAs are different: the installer that owns the system can still claim the commercial §48E credit for systems placed in service by the end of 2027 and may pass part of that value on through a lower monthly price.
Cost line
Amount
Installed cost (21.6 kW)
$64,900
Federal credit (25D) for 2026 installs
$0
Your cost before state/local incentives
$64,900
Getting three or more quotes matters more than ever without the federal credit: installed prices for the same system often differ by 20–30%.
📈 Payback Period
How Long Is Solar Payback on a $300 Bill in North Dakota?
Simple payback divides installed cost by first-year bill savings. North Dakota requires net metering for systems up to 100 kW at investor-owned utilities; excess is credited at avoided cost. We therefore assume solar offsets about 87% of a $300/month bill in North Dakota — roughly $3,132/year — for a simple payback of about 20.7 years.
Over 25 years, with 3% annual rate increases and 0.5%/year panel degradation, cumulative bill savings minus the installed cost come to about $41,900. Full retail net metering means each kWh you produce is worth close to your retail rate. Model your own numbers in our solar payback calculator.
Solar vs utility company · 25-year comparison
25-year totals for a $300/month electric bill: 3%/yr rate increases, 0.5%/yr degradation, no federal credit. Methodology
At North Dakota's average rate of 12.36¢/kWh and 4.5 peak sun hours, a $300/month bill (~29,126 kWh/year) typically requires a 21.6 kW system — about 54 panels at 400W each. Use our solar system size calculator with your ZIP for a roof-specific estimate.
A 21.6 kW system in North Dakota costs roughly $64,900 installed at about $3.00 per watt. The 30% federal tax credit (25D) ended for systems installed after December 31, 2025, so there is no federal credit for a system you buy in 2026. North Dakota has no state solar tax credit; solar is exempt from property tax for five years.
At $64,900 installed and ~$3,132/year in bill savings, simple payback in North Dakota is about 20.7 years. North Dakota requires net metering for systems up to 100 kW at investor-owned utilities; excess is credited at avoided cost.
With about 20.7-year payback and roughly $41,900 in estimated 25-year net savings, a $300/month bill in North Dakota is a weak case for buying solar in 2026. Consider a smaller system, a battery, or a lease/PPA quote, and compare against efficiency upgrades first. See the [North Dakota solar page](/states/nd/) for net metering and incentive details.
The US average needs a 14.7 kW system at 16.3-year payback. North Dakota needs 21.6 kW with 20.7-year payback — driven by North Dakota's 12.36¢/kWh rate and 4.5 daily sun hours.
12.36¢/kWh — North Dakota average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
Solar production
4.5 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
Installed price
$3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
Federal tax credit
$0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
Net metering
Full retail net metering — solar assumed to offset 87% of the bill. North Dakota requires net metering for systems up to 100 kW at investor-owned utilities; excess is credited at avoided cost.
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.