My Solar Loan Costs $73 a Month More Than the Old Bill — I'd Sign It Again Anyway

11:30 on a June Saturday, 93 degrees in the shade, and I was standing on the lawn holding a clipboard I didn't need while a crew of four banged panel 28 of 32 onto the south face of the roof. The foreman waved. My neighbor across the street watched from his porch with the specific stillness of a man doing arithmetic on someone else's money, and he was right to: I had just signed a 20-year, 4.99 percent loan for $38,400, the after-incentive number on a system whose sticker read $54,857 before the federal credit did its 30 percent work. The old average electric bill: $233. The new loan payment: $287. My clipboard absorbed a lot of nervous tapping that morning.

The stakes were the obvious kind. $287 a month for 240 months is a promise of $68,880, against a utility bill that averaged $233 across 2022 through 2024 and had never once declined. The margin I was gambling on was $73 a month in the wrong direction, $876 a year, recoverable only if the panels produced what the proposal promised and the utility kept raising rates the way it had — 6.5 percent two years running, which is where a certain spreadsheet tab got its name.

The tab was called doom. It lived on the second sheet of the file I built at the dining table, and it contained nothin but the utility's historical rate increases going back eleven years, one row per year, no commentary. My husband reckoned the name was melodramatic til he looked at the rows. Then he stopped joking.

$233, the number I was escaping

Our bills ran a pattern anyone in the Carolinas recognizes: $140 in March, $310 in August, the average landing at $233 with central air fighting a 1998 compressor that had one good summer left, maybe two. The last pre-solar bill was $298 for May. I didn't put 32 panels on a roof to save the planet, tho thats a fine side effect; I did it because I'd spent three summers watching a monopoly apply increases I could do nothing about, and I wanted one bill whose math I controlled.

the 4.99 percent that wasn't a mortgage

The installer's financing arm quoted 4.99 fixed over twenty years, and the pitch leaned hard on the word fixed, as if it were the sibling of my 3.6 percent mortgage rate. It is not. It's a home improvement loan where the dealer buys the rate down by rolling the cost into the system price, which is how $38,400 of borrowed money corresponds to a sticker that began at $54,857. I asked the loan officer point-blank what the cash price would be without the buydown. She told me. I sat with the $3,900 gap for two full days before signing anything.

the HELOC quote at 8.9 and climbing

I priced a HELOC against it, because everyone prices a HELOC against everythin. Forty thousand dollars of home equity line at 8.9 percent variable, prime-plus, with a floor I didn't love and a payment that would float with the Fed's moods for ten years. The solar loan's fixed 4.99 beat it in every scenario except the one where rates fall hard for a decade straight. I ruled the HELOC out in March, and the April quote for an unrelated project came back at 9.4, which felt like a slight vindication delivered by mail.

the credit score detour

One wrinkle the solar ads never mention: shopping the loan dinged my credit score about 18 points in a week — three hard pulls, two bureaus, the usual machinery — and it mattered for exactly thirty days until the inquiries aged out. Nothin about a 20-year commitment required an 810. Watching the number move reminded me that financing solar is a credit event dressed up as a home upgrade, and no dealer frames it that way in the driveway with a clipboard in your hand.

production year one: 14,120 kWh

The proposal promised 14,800 kilowatt-hours a year. Year one actual, per the app I now check more frequently than is healthy: 14,120, a 4.6 percent miss driven almost entirely by February, when we had nine straight gray days and a maple that needed, in the arborist's professional opinion, a $400 crown thinning. I paid the $400. June production ran 11 percent over projection. The maple and I have an understanding now.

the tab named doom, revisited

Here is what doom looks like as of July 2026: fourteen rows of annual increases, the two most recent at 6.5 and 5.9 percent, and a projection line I update every time the utility files for another one. If increases average even 3.5 percent going forward, the old $233 bill crosses my $306 all-in cost — the $287 loan plus the $19 grid connection fee — in year six, and every increase after that is the system paying me back. If the utility holds rates flat for twenty straight years, I lose approximately $8,900 on the deal, and I will take that bet against a company that has never once held anything flat.

the $19 bill and the battery I skipped

The utility still sends a bill, cuz the grid is still my battery: $19 a month connection fee, plus an annual true-up where spring surplus credits get eaten by August. I priced an actual battery, 13.5 kilowatt-hours of it, at $13,200 installed, and walked away from it the way you walk away from a second mortgage for a flashlight. The power goes out here twice a year for an afternoon. The battery would have pushed the payment to $374, and doom does not yet justify that.

It is a year later, give or take, and panel 28 from that Saturday still carries a scuff of installer's chalk on its corner that I refuse to let anyone clean off. The clipboard lives in the garage. The app says 14,120 for year one. The doom tab says the utility filed for another increase this June, and every row it adds is the closest thing to a refund I will ever see from a monopoly — $73 a month of patience, buying my way out one sunburned shingle at a time.