How Solar Payback Works: Calculating Your Break-Even and ROI
A plain-English guide to the solar payback period — the formula, a worked example, the factors that move it, and how payback, break-even, and ROI relate in 2026.
Data-driven articles to help you make smarter clean energy decisions — from EV ownership costs to solar ROI and home electrification.
A plain-English guide to the solar payback period — the formula, a worked example, the factors that move it, and how payback, break-even, and ROI relate in 2026.
A plain, up-to-date answer to whether the federal EV tax credit has returned. As of 2026, no federal EV purchase credit exists — here's the current status and what would have to happen for it to return.
The Section 30C home EV charger tax credit — 30% of cost up to $1,000 — expired June 30, 2026. Here's what it was worth, who could still claim it for a pre-deadline install, and what remains.
With the $7,500 federal credit gone, automakers are offering their own discounts, rebates, and lease deals. Here's how to spot a genuine price cut versus a repackaged sticker price.
Bought an EV before the September 30, 2025 deadline? You may still be able to claim the federal credit. Here's the binding-contract rule, the paperwork you need, and how to file Form 8936.
The 'leasing loophole' that passed a $7,500 federal credit through to lease payments ended with the rest of the EV credits. Here's what EV leasing math looks like in 2026 and when it still makes sense.
With the federal EV credit gone, state and utility programs are the main way to save. Here's how state EV incentives work in 2026, which states are most generous, and how to stack them.
The used EV tax credit (Section 25E) ended September 30, 2025. Here's how losing the $4,000 credit reshaped used EV prices and where the smart value still is in 2026.
No new EV qualifies for the federal tax credit in 2026 — and the viral '200,000-unit cap' loophole is a myth. Here's the real rule, who can still claim a 2025 grandfathered credit, and what actually replaced the credit.
The federal EV tax credit is gone. An honest look at the new math — per-mile costs, break-even timelines, and which buyers still come out ahead in 2026.
Heat pump water heaters need air, drainage, and headroom. Where they work best — garage vs basement vs utility room — plus the honest answer for cold climates.
An honest look at heat pump water heater pros and cons — real savings, slower recovery, noise, space needs, and who should (and shouldn't) buy one.
Compare heat pump and gas water heater costs head-to-head. Annual operating cost tables at different gas and electricity prices, upfront costs, and when each wins.
The 30% federal battery credit ended December 31, 2025. A worked example of the new payback math, what still makes batteries pencil out, and who should buy now versus wait.
The 30% federal solar tax credit is gone for purchased systems. Honest math on payback at full price, the five factors that now decide the answer, and who should still buy.
Buyers lost the 30% federal credit; leasing companies didn't. How leases and PPAs work in 2026, what the credit pass-through really means, and who should choose which.
The federal EV tax credit ended September 30, 2025. Here's who can still claim a grandfathered credit, which state and charger incentives remain, and what it means for EV economics in 2026.
Why EVs lose 20-35% of range in freezing weather, which factors matter most, what it does to your cost per mile, and seven proven ways to reduce the loss.
Compare heat pump and gas furnace costs across US climate zones. Installation, operating costs, efficiency in cold weather, and when each system wins.
Compare home battery storage against portable and standby generators on cost, runtime, fuel, maintenance, and daily value — with a framework for choosing.
Compare EV charging costs at home vs public Level 2 and DC fast chargers. See real per-mile costs, state-by-state rates, and annual savings for 2026.
Calculate how many solar panels your home needs based on your electricity usage, location, and roof. Includes a worked example and panel-count table by monthly bill.
A full breakdown of electric vehicle ownership costs — purchase price, charging, maintenance, insurance, and depreciation — compared to gas cars.
State-by-state breakdown of solar panel ROI — electricity rates, sun hours, incentives, and net metering policies that determine your payback period.
When does pairing a home battery with solar panels improve your ROI? Analyzing TOU arbitrage, backup value, NEM 3.0, and the real payback numbers.
What time-of-use (TOU) electricity rates are, how peak and off-peak pricing works, and who saves money by switching — especially EV owners and battery households.