US residential solar · 2026 data

How Many Solar Panels Does a 1-Bedroom Apartment Need?

Q: Can renters put solar panels on an apartment?

Yes, in limited ways. Community solar lets renters subscribe to an off-site array and receive bill credits; the US Department of Energy counted 24 states and localities, including Washington D.C., with enabling laws as of August 2024, and subscriptions commonly advertise 5–15% savings. Plug-in balcony solar (up to 1,200 W through a standard outlet) had been signed into law in at least eight states as of July 2026, including Utah, Colorado, Virginia and Maryland, and those laws require UL 3700 or equivalent safety certification. Your lease and landlord rules still apply, so check them before installing anything.

Q: Is there still a federal solar tax credit in 2026?

Not for panels you buy yourself. The 30% residential credit (Section 25D) ended for expenditures made after December 31, 2025 under the One Big Beautiful Bill Act, so a system you purchase in 2026 receives no federal credit. Leased or power-purchase-agreement systems can still qualify for the commercial 48E credit, which the provider claims, for systems placed in service through 2027 (later if construction began by July 4, 2026); how much of that reaches you depends on the contract. Some states still offer incentives, such as New York's 25% credit up to $5,000 for a principal residence. Confirm with a tax professional.

Q: How much does solar cost for a 1-bedroom apartment, and how long is the payback?

A 3.6 kW system (9 panels) costs roughly $9,000–$12,600 at the $2.50–$3.50 per watt range reported for 2026 US residential installs, with no federal credit for purchased systems. At the 2024 national average residential price of 16.5 cents per kWh (EIA), such a system produces about 4,700 kWh a year and saves roughly $780, a simple payback of about 11–16 years; at 25 cents per kWh the mid-range payback is about 8 years. Small systems often cost more per watt than these averages, so get quotes.

Q: Is balcony solar or community solar better for a renter?

Community solar has no hardware to buy and commonly advertises 5–15% off your electricity credits, so it suits renters who move often. Plug-in balcony solar with 2–3 panels (800–1,200 W) produces roughly 86–130 kWh per month at 4.5 sun hours, about 20–30% of a 400 kWh apartment under good conditions, though balcony orientation and shade can cut that. Choose plug-in if it is legal in your state, you have sunny outdoor space, and you will stay long enough to recoup the kit cost; the two can also be combined.

Est. net savings

$8,500

Over 25 Years (illustrative example) · no federal credit

$9,900 Est. cost (no federal credit)

12.7 yrs Payback

3.6 kW System size

Typical result:

About 9 panels (400 W)
3.6 kW system
About $9,900 before incentives
About 12.7-year payback at 16.5¢/kWh

✓ EIA rates & NREL sun data ✓ 2026 federal policy applied ✓ Open methodology

Updated September 29, 2026 · 9 min read ·By Green Energy Calculators Editorial Team

Calculate My System Size View State Data

25 years without solar vs with solar

Assumes 3%/yr rate increases, 0.5%/yr panel degradation and no federal tax credit (the 30% §25D credit ended for systems installed after Dec 31, 2025). How we calculate

Without solar

25-year utility bills

$18,400

Rates rise ~3% per year

With solar

System cost + remaining bills

$9,900

Installed cost, no federal credit

Difference

Estimated 25-year net

+$8,500

Before any state or utility incentives

Author Green Energy Calculators Editorial Team

Editorial policy No paid placements

Last updated Sep 29, 2026

Data approach EIA rates · NREL sun hours · 2026 federal policy · methodology

A 1-bedroom apartment that uses about 400 kWh a month needs roughly 9 solar panels (400 W each, about 3.6 kW) to cover all of its electricity at 4.5 peak sun hours per day. That ranges from about 6 panels in desert-level sun to about 12 in cloudy climates. Most renters can’t install rooftop panels, so plug-in balcony systems and community solar are the practical routes.

Key takeaways

Panel count depends on three inputs: your monthly kWh, your location’s peak sun hours, and panel wattage.
Federal credit changed: the 30% credit for panels you buy ended on December 31, 2025.
Renters have options: plug-in balcony solar (up to 1,200 W in states that allow it) and community solar.
Payback varies with your electricity price: about 8 years at 25¢/kWh versus about 13 years at 16.5¢/kWh in our example.

How Much Electricity Does a 1-Bedroom Apartment Use Per Month?

There is no official statistic for 1-bedroom apartments specifically, but EIA data give useful benchmarks. The average US residential customer used about 865 kWh per month in 2024, according to EIA. Apartments use far less than that average because they are smaller and share walls. EIA’s 2020 Residential Energy Consumption Survey (RECS) puts apartments in buildings with five or more units at roughly 6,100 kWh per year, or about 510 kWh per month (converted from EIA’s 20.8 million Btu of electricity per household). A 1-bedroom is usually smaller than the average apartment in that group.

Electricity Use Benchmarks (EIA)

Household type	Avg annual kWh	Avg monthly kWh	Source
All US households	10,566	~881	EIA RECS 2020
Apartments, 5+ unit buildings	~6,100	~508	EIA RECS 2020, Table CE4.6
Northeast apartments, 5+ units	4,120	~343	EIA RECS 2015

For planning, treat 300–500 kWh per month as a reasonable range for a 1-bedroom, then replace it with your own number. Pull your last 12 months of bills and average them, because seasonal swings can be large. Nationally, EIA reports that air conditioning accounted for about 19% of residential electricity use in 2020, with space heating and water heating about 12% each, so electric heat, hot water or heavy AC push a household toward the top of the range.

Average Monthly Electricity Use per Household. A 508 kWh apartment bill is about $84 a month at 16.5 cents per kWh. Source: EIA RECS 2020 and 2015 (annual kWh divided by 12); EIA 2024 average price.

Chart summary: Apartments in larger buildings use roughly 40% less electricity than the average US household (about 508 versus 881 kWh per month), and Northeast apartments in the 2015 survey averaged even less (about 343 kWh). Size your system from your own bills, not a national average.

How to Calculate the Right Number of Solar Panels for a Small Apartment

Use this standard sizing formula:

Panels needed = Monthly kWh ÷ (Peak sun hours × Panel kW × 30 days × 0.80)

A 400 W panel is 0.4 kW. The 0.80 factor covers real-world losses from heat, wiring, inverter conversion and shading. NREL’s PVWatts calculator defaults to about 14% system losses (a factor near 0.86), so 0.80 is a deliberately conservative planning number. Peak sun hours are the daily equivalent hours of full-strength sunlight at your location; they are approximately 6.5 in Phoenix, 4.0–4.2 in Boston and New York, and 3.6 in Seattle.

Worked example (400 kWh per month):

Phoenix, AZ (≈6.5 sun hours): 400 ÷ (6.5 × 0.4 × 30 × 0.80) = 6.4, so about 6 panels
Boston, MA (≈4.2 sun hours): 400 ÷ (4.2 × 0.4 × 30 × 0.80) = 9.9, so about 10 panels
Seattle, WA (≈3.6 sun hours): 400 ÷ (3.6 × 0.4 × 30 × 0.80) = 11.6, so about 12 panels

Panels Needed by Peak Sun Hours. A 400 kWh/month apartment needs about 9 panels at 4.5 sun hours, a roughly $9,900 system at $2.75 per watt. Source: calculated with the NREL PVWatts-style formula; sun hours are approximate.

Chart summary: Each 400 W panel yields roughly 9.6 kWh per month for every peak sun hour. At 400 kWh per month you need about 12 panels at 3.5 sun hours but about 6 at 6.5 sun hours, so location can double your panel count. Counts are rounded to the nearest whole panel; these are calculations, not measured data. For more on this topic, see our guide to How Many Solar Panels for a Studio Apartment?.

Orientation, tilt and shading also change output, and near-vertical balcony panels produce less than an optimally tilted rooftop array. For your exact address, run a free estimate in NREL’s PVWatts calculator (NREL is now the National Laboratory of the Rockies). Or use our solar system size calculator, which builds in your ZIP code’s sun hours.

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What Does a Solar Panel System for a 1-Bedroom Apartment Cost in 2026?

US residential solar in 2026 is commonly quoted at $2.50–$3.50 per watt installed before incentives, based on EnergySage marketplace data and NREL cost benchmarks. Very small systems often cost more per watt than these averages because fixed costs are spread over fewer panels, so treat the table below as a floor for planning. For a full cost breakdown by state and system size, see our guide to How Much Do Solar Panels Cost in 2026?.

Estimated Cost by System Size (400 W panels, no incentives)

Panels	System size	Est. installed cost ($2.50–$3.50/W)	kWh per month at 4.5 sun hours
5	2.0 kW	$5,000–$7,000	~216
7	2.8 kW	$7,000–$9,800	~302
9	3.6 kW	$9,000–$12,600	~389
11	4.4 kW	$11,000–$15,400	~475

The federal credit has changed. The 30% residential clean energy credit (Section 25D) does not apply to solar expenditures made after December 31, 2025, so a system you buy in 2026 receives no federal credit (IRS). Solar leases and power purchase agreements can still qualify for the business-side 48E credit through 2027 (later for projects that began construction by July 4, 2026), but the provider claims it, and any benefit to you depends on your contract. State incentives vary: for example, New York offers a credit equal to 25% of qualified expenditures, limited to $5,000, for systems at a principal residence (NY Tax Department).

Estimated Installed Cost by System Size. A 3.6 kW system runs $9,000 to $12,600 with no federal credit for purchased systems. Source: calculated from the 2026 US range of $2.50-$3.50 per watt (EnergySage, NREL benchmarks).

Chart summary: A 9-panel, 3.6 kW system runs about $9,000 at $2.50 per watt and about $12,600 at $3.50 per watt. Every added panel (0.4 kW) adds roughly $1,000–$1,400. These are cost-per-watt calculations, not quotes; with no federal credit for purchased systems, the prices shown are what you would pay before any state incentive.

Solar vs utility company · 25-year comparison

25-year totals: 3%/yr rate increases, 0.5%/yr degradation, no federal credit. Methodology

Total utility payments

$18,400

Total solar cost (installed + remaining bills)

$9,900

Net savings

+$8,500

Avg. monthly difference

+$28/mo

See my savings →

Solar Options for Apartment Renters Who Don’t Own the Roof

Most apartment residents can’t put panels on the roof, but there are four realistic paths.

1. Plug-in balcony solar. These small systems (typically 400–1,200 W) plug into a standard 120 V outlet. Utah passed the first US law in March 2025, and as of July 2026 Utah, Maine, Virginia, Maryland, Colorado, Connecticut, Vermont and New Hampshire had signed plug-in solar laws, according to Electrek; trackers report New Jersey following in September 2026. Most follow Utah’s 1,200 W limit and require UL 3700 (a safety standard published in December 2025) or an equivalent. Some laws take effect later than signing, certified equipment was still scarce in mid-2026, and your lease still governs, so verify your state’s current rules. At 4.5 sun hours, two panels (800 W) produce roughly 86 kWh a month and three (1,200 W) about 130 kWh, around 20–30% of a 400 kWh apartment under good conditions.

2. Community solar. You subscribe to a share of an off-site array and receive credits on your utility bill, with no equipment at your home. The US Department of Energy counted 24 states and localities, including Washington D.C., with enabling legislation as of August 2024 (DOE). Providers commonly advertise discounts of about 5–15% (Rewiring America). Colorado, for example, has a long-running program; see our Colorado solar page. Terms differ by provider, so read cancellation and credit-rate details before signing.

3. Portable solar generators. A portable panel with a power station can run a laptop, phone chargers or a fan. It doesn’t offset your whole bill, but it needs no installation or landlord sign-off.

4. A rooftop arrangement with your landlord. A 5–9 panel rooftop system is possible only if the building owner agrees, usually through a lease or power purchase agreement. Get the savings split and contract term in writing.

Is Solar Worth It for a 1-Bedroom Apartment? Payback by Electricity Price

The answer depends mostly on what you pay per kWh. Our example is a 3.6 kW system at a mid-range $9,900 (about $2.75 per watt) producing about 4,730 kWh in year one (3.6 kW × 4.5 sun hours × 365 days × 0.80). EIA reports the average US residential price rose from 16.0 cents per kWh in 2023 to 16.5 cents in 2024 (EIA). State prices vary widely: EIA data compiled by NEADA showed August 2025 averages from about 12 cents in Idaho to about 32 cents in California and 39 cents in Hawaii (NEADA).

25-Year Cumulative Cash Flow, 3.6 kW System. At 16.5 cents per kWh the $9,900 system nets about $8,486 after 25 years; at 25 cents, about $17,957. Source: calculated from EIA 2024 price and NREL 0.5% annual degradation; flat rates.

Chart summary: At 16.5 cents per kWh, the example system saves about $780 in year one and its cumulative cash flow turns positive in year 14 (a simple payback of 12.7 years, slightly later once 0.5% annual degradation is counted). At 25 cents it turns positive in year 9. By year 25 the line ends near $8,486 at 16.5 cents and $17,957 at 25 cents. Both lines assume no federal credit, financing costs, inverter replacement or rate changes.

Panels lose roughly 0.5% of output per year in NREL’s benchmark studies, so a system still produces about 88% of its original output in year 25. Over 25 years, the example system would generate about 111,000 kWh, worth about $18,400 at a flat 16.5 cents, or about $8,500 net of the $9,900 cost, before inverter replacement or financing costs. Rising rates would improve that; lower export credits or lease terms would reduce it. Owned rooftop systems also depend on your utility’s net metering rules, so check them first.

Use our solar savings calculator to run your own kWh, rate and system size, or see how quickly you break even with the solar payback calculator.

Sources

U.S. Energy Information Administration: average residential consumption and price, 2024; RECS 2020 Table CE4.6; electricity use in homes; RECS 2020 release
IRS: Residential Clean Energy Credit
New York State Department of Taxation and Finance: Solar Energy System Equipment Credit
U.S. Department of Energy: Community solar market trends
Electrek: UL 3700 plug-in solar and state laws (July 2026)
NREL: PVWatts calculator
NEADA/EIA: state residential prices, August 2025

Calculations use 400 W panels, a 0.80 system factor, 30-day months and the stated sun-hour and price assumptions. Prices, incentives and state laws change; confirm current rules before buying. This is general information, not tax or financial advice.

Frequently asked questions

Direct answers for US homeowners — sized for a $50/month electric bill.

How many solar panels does a 1-bedroom apartment need?

A 1-bedroom apartment using 400 kWh per month needs about 9 panels (400 W each, roughly 3.6 kW) at 4.5 peak sun hours per day to offset all of its electricity. The count runs from about 6 panels at 6.5 sun hours (desert-level sun) to about 12 at 3.6 sun hours (Seattle-type sun). At 300 kWh per month it is about 7 panels at 4.5 sun hours; at 500 kWh, about 12. Formula: monthly kWh ÷ (peak sun hours × 0.4 kW × 30 days × 0.80).

Can renters put solar panels on an apartment?

Is there still a federal solar tax credit in 2026?

How much does solar cost for a 1-bedroom apartment, and how long is the payback?

Is balcony solar or community solar better for a renter?

Same usage, bill-based guide

Your 1 Bedroom Apartment target maps to roughly a $50/month electric bill nationally.

$50 $50/month electric bill guide Panels · cost · payback · by state →

Popular state solar guides

Electricity rates and incentives vary — see data for your state.

CA California 33.25¢/kWh · 5.8h sun TX Texas 16.06¢/kWh · 5.6h sun FL Florida 15.3¢/kWh · 5.7h sun AZ Arizona 15.44¢/kWh · 6.5h sun NC North Carolina 14.94¢/kWh · 5.2h sun NY New York 29.38¢/kWh · 4.3h sun MA Massachusetts 30.14¢/kWh · 4.2h sun CO Colorado 16.72¢/kWh · 5.5h sun

View all 50 states →

How these numbers were calculated

Electricity rate: 18.19¢/kWh — US average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
Solar production: 4.5 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
Installed price: $3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
Federal tax credit: $0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
Net metering: National blend — solar assumed to offset 75% of the bill (87% in full-retail net-metering states, 55–70% elsewhere).
Model: Version 2026.10 · 3%/yr electricity price escalation · 0.5%/yr panel degradation · simple payback = installed cost ÷ year-1 savings
Policy checked: September 29, 2026 · Full methodology · Report an error

Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.