Solar payback / By state / South Dakota
Solar panel cost in South Dakota, 2026
Electricity here costs 12.2 cents a kWh, below the national average of 17.1 cents. A kilowatt of panels makes about 1,350 kWh a year on a South Dakota roof. Put your own bill in below.
Your house
Pays for itself in
15 yr
At today's bill, rising
System you need
11.8 kW
about 30 panels
Cost after credits
$34,230
no federal credit in 2026
25 year net gain
$32,044
savings minus what it cost
What you have saved, year by year
Your monthly bill
On grid power you pay $180 a month, every month, for as long as you live there.
An 11.8 kW system in South Dakota makes about 15,934 kWh a year, which covers most of the 17,705 kWh your house uses. It costs $34,230 installed, and because the federal credit ended on 31 December 2025 that is also what you pay. Over 25 years you would otherwise hand the utility $78,752.
What these numbers mean in South Dakota
Two things decide whether solar pays here, and only one of them is sunshine. The first is what you are paying now: South Dakota sits 44 of 51 for residential electricity price, so every kWh the roof makes is worth 12.2 cents that stays in your pocket. The second is how much the roof makes, and South Dakota ranks 18 of 51 there.
A state with expensive power and moderate sun beats a sunny state with cheap power almost every time. That is why solar pays back faster in the northeast than in parts of the south, which surprises most people.
On a $180 a month bill, a South Dakota house uses roughly 17,705 kWh a year. Covering ninety percent of that needs about 11.8 kW of panels, which costs $34,230 installed at the national average price per watt, and produces about 15,934 kWh a year.
Those savings pass the cost of the system in year 15. Over 25 years you save $66,274 against a grid bill that would have totalled $78,752, leaving you $32,044 ahead. Panels are generally warranted for 25 years and keep working after that at reduced output.
One thing every figure above assumes: no federal tax credit. The 30 percent credit ended on December 31, 2025. If a salesperson or a calculator shows you a shorter payback, check whether they have quietly subtracted a credit that no longer exists.
Common questions
- How much do solar panels cost in South Dakota?
- A system big enough for a typical South Dakota home is around 11.8 kW, which is about 30 panels. At the national average of $2.90 a watt that is $34,230 installed. Because the 30 percent federal tax credit ended on December 31, 2025, that is also what you pay: there is no longer a credit to subtract.
- Is solar worth it in South Dakota in 2026?
- Yes, on these figures. Electricity in South Dakota costs 12.2 cents a kWh and a kilowatt of panels makes about 1,350 kWh a year here, so the system pays for itself in about 15 years and is ahead by $32,044 over 25. That is with no federal credit at all.
- Is there still a solar tax credit in South Dakota?
- Not a federal one. Section 25D, the 30 percent residential credit, ended on December 31, 2025 under the One Big Beautiful Bill, with no phase down. State and utility programs are separate and some still run, so check with your own utility before you sign. Any calculator still showing you 30 percent off is about three years optimistic on payback.
- How many solar panels does a South Dakota home need?
- About 30 panels, taking a modern 400 watt panel. That comes from a house using 17,705 kWh a year and each kilowatt of panels producing 1,350 kWh a year in South Dakota.