Are Solar Panels Worth It?

How Your State Determines Solar Payback — A Region-by-Region Reality Check

Sunlight hours and electricity rates are the two levers that determine how quickly solar pays back. High sun plus high rates equals fast payback. Low sun plus low rates can mean solar never makes strong financial sense without additional state incentives.

Hawaii sits at one extreme: electricity rates averaging over 40 cents per kWh make it the most solar-favorable state in the country. Average payback periods run just 5–6 years, and lifetime savings routinely exceed $60,000 on a single system. California is more nuanced — rates are high (averaging 26–28 cents per kWh in many utility territories), but the 2023 overhaul of net metering (NEM 3.0) reduced export credits significantly, pushing payback periods toward 8–10 years in much of the state.

Arizona combines excellent sun with moderate rates around 13–15 cents per kWh, yielding payback periods of 7–9 years and solid long-term returns. Texas presents a mixed picture: sun is abundant, but electricity rates in deregulated markets can be volatile and the state offers no additional solar tax credit beyond the federal ITC, so payback typically runs 8–11 years depending on utility territory. For state-level payback data with the ITC applied, see our guide to Solar Panel Payback Period by State. For state-level payback data with the ITC applied, see our guide to Solar Panel Payback Period by State.

At the less favorable end, Washington state’s electricity rates average just 9–10 cents per kWh thanks to abundant hydropower — cheap enough that solar payback can stretch to 13–16 years even with good financing. That doesn’t mean solar is wrong for everyone in Washington, but it does mean you need to run the numbers rather than assume it works.

Net metering policy is increasingly the variable that separates a strong solar investment from a mediocre one. States with full retail-rate net metering — where excess power exports earn the same credit as what you pay to import — dramatically improve the economics. States that have moved to avoided-cost compensation (paying only 3–5 cents per kWh for exports) require larger battery storage investments to fully capture the value of what you generate. The solar net metering calculator lets you model both scenarios against your actual utility rate.

NREL’s PVWatts data shows that even northern states like Massachusetts often outperform expectations: Boston receives about 4.2 peak sun hours daily, and the state’s average retail rate of 24–26 cents per kWh makes solar highly competitive despite the latitude.

Battery Storage in 2026 — When It Adds Value and When It Doesn’t

A solar-only system made strong financial sense when net metering paid full retail for every exported kilowatt-hour. As more states shift to lower-value export compensation, a home battery increasingly determines how much of your own generation you actually use versus give away at minimal credit.

Without storage, most homes consume only 30–50% of what they generate during peak midday production hours, exporting the rest. Add a 10–13.5 kWh battery — the range covered by the Tesla Powerwall 3 and competing units from Enphase, Franklin, and SolarEdge — and self-consumption typically rises to 70–90%. In states with poor export compensation, that shift can add $400–$800 per year in additional bill savings, meaningfully changing the overall payback calculation. The battery storage calculator helps you model whether storage pencils out given your utility’s specific export rate.

Battery pricing has fallen roughly 15% from 2023 to 2026 but remains a significant add-on cost: a single Powerwall 3 installed typically runs $12,000–$14,000, or $8,400–$9,800 after the 30% ITC (batteries installed alongside solar qualify for the full credit). Payback on storage alone is typically 10–14 years in most states — improving, but still longer than the solar panels themselves.

Battery storage makes the clearest financial case in states with time-of-use (TOU) rate structures, where electricity costs 30–50 cents per kWh during peak evening hours. Charging your battery during cheap midday solar generation and discharging it during expensive peak hours can yield $600–$1,200 annually in avoided peak charges. If your utility offers a TOU option, running the numbers on time-of-use savings is worth doing before you decide whether storage belongs in your system design.

Backup power value is real but harder to quantify in a spreadsheet. For homeowners in areas prone to extended outages — hurricane corridors, wildfire zones, or regions with aging grid infrastructure — the economic value of keeping essential loads running during an outage can be substantial, even if it doesn’t appear in a standard payback calculation.