Solar PV vs Solar Water Heater: Which Is Right for Your Home
Written by HyreSolar Research Desk Primary-source research and fact checking
Quick answer
Solar PV vs Solar Water Heater comes down to upfront cost, lifetime savings and how long you plan to stay in the home; here is each factor side by side.
Solar PV panels make electricity that can run anything in the house, including an electric or heat pump water heater, and exports to the grid can earn credit.
A solar water heater (solar thermal) uses roof collectors to heat water directly; ENERGY STAR says it can cut annual hot water costs in half, and it works with gas or electric backup, so it offsets whichever fuel you use now.
PV is the flexible, whole-house choice; solar thermal is a narrower tool that makes most sense with high hot-water use and limited roof space.
Cost side by side
Installed prices as other publishers state them, gross of incentives. Each range is the median published low to the median published high across at least 12 dated sources, retrieved October 21–22, 2026; the source rows sit on the linked cost page.
| Option | Published range | Sources |
|---|---|---|
| Solar PV: typical installed system | $22,100–$27,500 | 14 dated |
No 30% federal credit is subtracted: Section 25D ended for expenditures after December 31, 2025.
Solar PV vs a solar water heater on the factors that differ
| Solar PV | Solar water heater (thermal) | |
|---|---|---|
| What it produces | Electricity for any load, plus exports | Hot water only |
| Fuel it offsets | Grid electricity | Gas, propane or electricity, whichever the backup heater uses |
| Needs a backup heater | Not applicable | Yes: "generally designed for use with an electric or gas back-up water heater" (ENERGY STAR) |
| Stated saving | Depends on your rate and export rule | Can cut annual hot water costs in half (ENERGY STAR) |
| Cold climates | Works; output falls in winter with shorter days | Below 42°F risk needs a closed-loop antifreeze or drain-back system; avoid batch systems |
| Moving parts | None in the panels; an inverter | Pumps and controls in active systems; none in passive |
| Federal credit for buyers | None: Section 25D ended Dec 31, 2025 | None: same section, same end date |
| Leased systems | Lessor may still claim Section 48E | Section 48E(i) denies the credit for leased solar water heating |
ENERGY STAR solar water heater guidance; Public Law 119-21 and 26 U.S.C. 25D(d).
Start with what heats your water today
In EIA’s 2020 Residential Energy Consumption Survey (table HC8.1), natural gas was the main water-heating fuel in about 59 million US homes and electricity in about 57 million, with smaller numbers on propane and fuel oil. That split matters here.
If you heat water with gas or propane, PV cannot touch that bill unless you also switch to an electric water heater. A solar water heater offsets gas directly, because its backup is your existing gas heater.
If you heat water with electricity, PV offsets it along with everything else, and pairing PV with a heat pump water heater cuts the electricity the water heater needs in the first place.
That pairing is the main reason solar thermal has become a niche product: it gives similar results with one technology on the roof instead of two.
Savings over 25 years
A solar water heater’s ceiling is your hot-water bill. ENERGY STAR’s figure is that it can cut annual hot water costs in half, so a household with a large hot-water load (big family, frequent laundry) gains the most, and a small household gains little. Every dollar it saves comes off one end use.
PV’s ceiling is your whole electricity bill, minus fixed charges, plus any export credit. Under net metering, surplus summer output offsets winter use; under net billing, self-consumption matters more and shifting water heating into solar hours with a timer or heat pump water heater adds value (see net metering vs net billing).
Neither gets a federal tax credit for a homeowner who buys in 2026. Section 25D covered both solar electric and solar water heating, and it ended for expenditures after December 31, 2025.
Unlike leased PV, a leased solar water heater cannot carry the Section 48E business credit: the law excludes property described in Section 25D(d)(1), which is solar water heating.
Check state and utility rebates, which still exist for some water-heating equipment, with the incentive finder.
We print no installed price for solar thermal: we do not hold the 12 dated quotes our price rule requires.
Which to choose if…
- 1You want to cut the whole electric bill
Solar PV. It powers every load and can grow with an EV or heat pump.
- 2You heat water with gas, use a lot of hot water and have a small sunny roof area
A solar water heater offsets gas directly with fewer square feet than PV would need to do the same job.
- 3You heat water with electricity
PV plus a heat pump water heater is usually simpler than adding collectors.
- 4Your winters freeze hard
If you choose thermal, insist on a closed-loop antifreeze or drain-back design, never a batch system.
When you are ready
Ready to explore solar for your home?
If you have done your research and want to speak with a solar professional, HyreSolar can help you explore available options.
Free, with no obligation: a person at HyreSolar reads your request and gets back to you about it. Matching with solar professionals is not live yet, so this is not a quote, and nothing is shared with anyone until you agree.
Keep learningQuestions
Is a solar water heater better than solar panels?
Can solar panels heat my water?
How much does a solar water heater save?
Is there a tax credit for a solar water heater in 2026?
Do solar water heaters work in cold climates?
Sources & retrieval dates
- ENERGY STAR, Solar Water Heaters , Can cut annual hot water costs in half; designed for use with electric or gas backup; closed-loop or drain-back below 42°F; avoid batch systems with distinct winters. Retrieved 22 October 2026.
- US EIA, Residential Energy Consumption Survey 2020, Table HC8.1 Water heating in U.S. homes , Fuel used by main water heater: natural gas 59.33 million, electricity 57.04 million households. Retrieved 22 October 2026.
- Public Law 119-21 (One Big Beautiful Bill Act) , Termination of Section 25D after December 31, 2025; new Section 48E(i) denying the credit for leased property described in 25D(d)(1) and (4). Retrieved 3 September 2026.
- 26 U.S.C. 25D (2024 edition) , Definitions: 25D(d)(1) qualified solar water heating property; 25D(d)(2) qualified solar electric property. Retrieved 3 September 2026.
HyreSolar does not install, finance or sell solar. This page is general information, not tax, legal or financial advice; terms, prices and rules vary by state, utility and contract.