25-year savings projection for New Mexico
This projection starts from New Mexico's assumed $0.15/kWh electricity rate and 1,700 kWh/kW of annual production, then grows savings by 3% a year as electricity prices rise and reduces output by 0.5% a year as panels degrade.
| Year | Annual savings | Cumulative savings | vs. $22,200 cost |
|---|---|---|---|
| Year 1 | $1,681 | $1,681 | −$20,519 |
| Year 5 | $1,854 | $8,833 | −$13,367 |
| Year 10 | $2,097 | $18,819 | −$3,381 |
| Year 15 | $2,370 | $30,110 | +$7,910 |
| Year 20 | $2,680 | $42,875 | +$20,675 |
| Year 25 | $3,030 | $57,306 | +$35,106 |
A simple, undiscounted projection — it does not apply a discount rate, financing interest, inverter replacement (commonly needed once in 25 years), maintenance, or any change in home value. Treat it as a shape, not a forecast. See methodology.
Why savings look like this in New Mexico
Top-tier sunshine plus a meaningful state tax credit make the underlying economics better than the modest rates suggest.
The single biggest variable is what your utility pays for exported power. New Mexico requires net metering for systems up to 80 MW; residential exports are generally credited at or near retail with monthly netting, depending on the utility tariff.
What would change this number
- Your actual rate. This uses a $0.15/kWh New Mexico average. If you pay more, savings scale up roughly proportionally.
- Self-consumption. We assume 68% of output is used on site at retail value and the rest exported at 45% of retail. Households home during the day, or with a battery, do better.
- Electricity price growth. At 3% a year, savings nearly double by year 25. Slower growth meaningfully reduces lifetime return.
- Incentives. New Mexico's main program — 10% state tax credit (capped at $6,000) — reduces net cost and shortens break-even. See New Mexico incentives →
- Financing. A cash purchase earns the return above. A loan shifts it — interest can consume a large share of lifetime savings.
Frequently asked questions
How much can you save with solar panels in New Mexico?
An 8 kW system in New Mexico could save roughly $1,681 in the first year — about $140 a month — and around $57,306 across 25 years, assuming electricity prices rise 3% a year and panel output declines 0.5% a year. Against a midpoint installed cost of $22,200, that is a net gain of about $35,106.
What is the ROI on solar panels in New Mexico?
On these assumptions, roughly 158% over a 25-year system life — $35,106 of net savings on a $22,200 system. That is a simple, undiscounted return: it ignores financing interest, the time value of money, and any effect on home resale value. A cash purchase and a loan produce very different numbers.
How long does it take for solar to pay for itself in New Mexico?
Around year 12, when cumulative savings first exceed the $22,200 installed cost. A simple payback that ignores rising electricity prices gives a wider range of 11–15 years.
Do solar savings in New Mexico include the federal tax credit?
No. The 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025, so none of these figures include it. Any savings projection you see elsewhere that still applies 30% to a 2026 purchase is overstating the return.
What most affects solar savings in New Mexico?
Three things, in order: your utility's export compensation (New Mexico requires net metering for systems up to 80 MW; residential exports are generally credited at or near retail with monthly netting, depending on the utility tariff.), how much of the output your household consumes on site rather than exporting, and your actual electricity rate versus the 0.15/kWh state assumption used here. 10% state tax credit (capped at $6,000) can improve the result further.
Where these numbers come from
State assumptions are informed by public data and reviewed periodically (September 2026):