How much do solar panels save per month?

The average US homeowner with a properly sized solar system saves $100 to $200 per month on electricity. The exact savings depend on your electricity rate, system size, sun hours, and net metering policy. Homeowners in high-rate states like California ($0.28/kWh), Massachusetts ($0.27/kWh), and Connecticut ($0.26/kWh) save more per month than those in low-rate states like Louisiana ($0.10/kWh).

Can you sell solar energy back to the power company?

Yes, through net metering. When your panels produce more electricity than your home uses, the excess flows to the grid and your utility credits your account. In most states, credits are at or near the retail electricity rate. You do not receive a check — the credits offset your bill. Some states and utilities also offer Solar Renewable Energy Credits (SRECs) as additional income.

Does solar eliminate your electric bill completely?

Nearly. A properly sized system can reduce your bill to the grid connection fee only, typically $10 to $20 per month. Completely eliminating the bill to $0 is rare because most utilities charge a minimum monthly fee for maintaining the grid connection. Some homeowners with annual true-up net metering achieve net-zero on an annual basis.

What happens to excess solar energy?

With net metering, excess energy flows to the grid and your utility credits your account. Credits typically roll over month to month. At the annual true-up (usually in April), any remaining credits may be paid out at wholesale rates (2 to 4 cents per kWh) or forfeited, depending on your utility. Without net metering, excess energy is exported for free unless you have a battery to store it.

Can I add batteries to my existing grid-tied system?

Yes. You need a hybrid inverter (or a retrofit battery system like Tesla Powerwall that includes its own inverter). The battery charges from solar during the day and provides backup power during grid outages. Adding a battery to an existing system typically costs $5,000 to $15,000 including installation. See our inverter comparison guide for hybrid inverter options.

What is time-of-use billing with solar?

Time-of-use (TOU) rates charge different electricity prices depending on the time of day — typically 2 to 3 times more expensive during peak evening hours (4 to 9 PM) than off-peak. Solar panels produce during midday (off-peak or mid-peak), but you use the most electricity during peak evening hours. A battery helps by storing cheap midday solar and discharging during expensive peak hours.

Is grid-tied or off-grid solar better?

Grid-tied is better for most homeowners. It is cheaper (no battery bank needed), simpler, and net metering effectively uses the grid as a free virtual battery. Off-grid is better only for remote properties where grid connection costs $10,000 or more, or for people who prioritize complete energy independence. A hybrid system (grid-tied plus battery) offers the best of both worlds.

What is net metering 3.0 in California?

California's NEM 3.0 (effective April 2023) reduced the credit rate for exported solar electricity from near-retail to a much lower avoided-cost rate (roughly $0.05 to $0.08/kWh vs the previous $0.25 to $0.30/kWh). This makes batteries much more important in California because storing solar for self-consumption is now worth far more than exporting it. NEM 3.0 extended the payback period for California solar by 2 to 4 years.

How Much Do Solar Panels Save On Your Electricity Bill? (+ Net Metering Explained)

Solar panels save the average US homeowner $100–$200 per month by reducing electricity bills 60–100 %. The mechanism is simple: your panels produce electricity during the day, your home uses it first, and any excess goes to the grid for credits (net metering). At night, you draw from the grid but the credits offset the cost. The result: you pay only for the net electricity you consume beyond what your panels produce.

Before I installed solar, my annual electric bill was about $1,800 ($150/month average). After installing an 8 kW system, my bill dropped to $180 for the entire year — a $12 grid connection fee each month plus a small balance in December and January when production dips below usage. The system pays for itself in about 7 years at current rates. After that, electricity is essentially free for the remaining 18–28 years of panel life.

How Solar Panels Lower Your Electric Bill

Here is the day-by-day flow:

During the day (when sun is shining):

Solar panels produce DC electricity
Your inverter converts it to AC
Your home uses the solar electricity first (lights, appliances, HVAC)
Any excess flows to the grid through your utility meter
Your meter credits you for every kWh exported

At night (when panels are not producing):

Your home draws electricity from the grid as normal
But the credits from daytime export offset the cost

End of month:

Grid electricity used: 1,000 kWh
Solar electricity exported (credits): 900 kWh
Net bill: 100 kWh × $0.16/kWh = $16 (plus ~$12 grid connection fee = $28 total)

Without solar, that bill would have been: 1,000 kWh × $0.16 = $160 + $12 = $172. Savings: $144/month.

Monthly Electric Bill: Without Solar vs With 8 kW Solar System

Without solar, this household pays $1,840/year in electricity (averaging $153/month). With an 8 kW solar system and net metering, the annual bill drops to $404/year — a savings of $1,436/year ($120/month). Summer months produce a net credit (bill = $12 grid fee only). Winter months still have a small bill because shorter days reduce solar production below usage. Net metering banks summer credits to offset winter costs.

Savings By Electricity Rate

Electricity rate	Monthly bill (no solar)	Monthly bill (with solar, 90% offset)	Monthly savings
$0.10/kWh (low, e.g. Louisiana)	$117	$24	$93
$0.16/kWh (US average)	$172	$29	$143
$0.22/kWh (above average, e.g. New York)	$224	$34	$190
$0.28/kWh (high, e.g. California)	$285	$40	$245
$0.35/kWh (very high, e.g. Hawaii, Massachusetts)	$347	$47	$300

The higher your electricity rate, the more solar saves. This is why solar payback is fastest in high-rate states (California, Massachusetts, Connecticut, New York, Hawaii) despite some of them having fewer sun hours than low-rate states (Louisiana, Texas).

What Is Net Metering And How Does It Work?

Net metering is a billing arrangement where your utility credits you for excess solar electricity that flows from your panels to the grid. Your electric meter literally measures the net difference between what you import and export.

How Credits Work

Excess production: During sunny midday hours, your panels produce more than your home uses. The excess flows to the grid.
Meter runs backward: Your meter tracks the export. Each kWh exported earns a credit.
Credits roll over: Unused credits carry forward to the next month. Summer overproduction builds up credits for winter.
Annual true-up: Once per year (varies by utility), your account is settled. If you have remaining credits, you may receive a payout at wholesale rates (typically $0.02–$0.04/kWh) or the credits reset.

Net Metering By State

Most US states have some form of net metering, but the details vary:

Category	States	Credit rate	Notes
Full retail NEM	Most states (38+)	100 % of retail rate	Each kWh exported = each kWh imported
Reduced NEM	California (NEM 3.0), some utilities	25–50 % of retail	Battery storage becomes important
No state mandate	AL, TN, MS, SD, ID	Varies by utility	Some utilities offer voluntary programs
Feed-in tariff	(Rare in US, common in EU)	Fixed rate per kWh	Guaranteed payment for all production

California's NEM 3.0 (effective April 2023) reduced export credits from near-retail (~~$0.28/kWh) to avoided-cost rates (~~$0.05–$0.08/kWh). This makes batteries much more valuable in California — storing solar for evening self-consumption is now worth 3–4× more than exporting it. NEM 3.0 extended California solar payback by 2–4 years but solar is still highly profitable.

Check your state: The DSIRE database (dsireusa.org) has current net metering policies for every US state and utility.

Can You Sell Electricity Back To The Grid?

Yes, through net metering — but you receive credits, not a check (in most programs). The credits offset your electricity bill, which functionally means you are "selling" your excess at the retail rate.

Some additional ways to earn from solar:

Program	How it works	Value
Net metering	Credits for excess production	Retail rate ($0.10–$0.35/kWh)
SRECs (Solar Renewable Energy Credits)	Sell tradeable credits in certain state markets	$10–$300 per SREC (1 SREC = 1,000 kWh)
Annual true-up payout	Cash for remaining credits at year-end	Wholesale rate ($0.02–$0.04/kWh)
Community solar credits	Share from a community solar farm	5–15 % bill discount

SRECs are available in: Massachusetts, New Jersey, Pennsylvania, Maryland, Washington DC, Ohio, Illinois, and a few other states. In Massachusetts, SRECs are currently worth about $200–$300 each — that is an additional $1,500–$2,500 per year for a typical 8 kW system.

Will Solar Panels Eliminate My Electric Bill?

Nearly — but not quite to $0. Here is why:

Grid connection fee ($10–$20/month): Most utilities charge a minimum monthly fee for maintaining the grid connection, even if your net electricity usage is zero. This fee is unavoidable for grid-tied systems.
Winter shortfall: In northern states, December and January production may fall below usage. Net metering credits from summer help, but may not fully cover the gap.
Time-of-use mismatch: If your utility uses TOU rates, solar produces during cheap midday hours but you consume during expensive evening hours. The credit value may be less than the consumption cost.

Realistic expectations:

System sized at 100 % of annual usage: Monthly bill = $12–$25 (grid fee + small winter balance)
System sized at 90 % of annual usage: Monthly bill = $20–$40
System sized at 110–120 % of annual usage: Monthly bill = $10–$15 (grid fee only, some annual credit)

Most homeowners aim for 90–110 % offset. Oversizing slightly (110 %) is smart because it provides a buffer for increased future usage (electric vehicle, heat pump, pool).

Grid-Tied vs Grid-Tied + Battery vs Off-Grid

Grid-Tied vs Grid-Tied + Battery vs Off-Grid Solar Systems

A standard grid-tied system is the cheapest and simplest — net metering credits offset your bill, but power goes out when the grid goes down. Adding a battery ($5,000–$15,000) provides backup during outages and can store cheap solar power for expensive evening hours. Off-grid systems have no utility connection at all — you need a large battery bank and generator backup for extended cloudy periods. For most homeowners, grid-tied with optional battery is the best value.

When To Add A Battery

A battery ($5,000–$15,000 for 10–15 kWh) makes sense when:

Frequent power outages: If you experience outages multiple times per year, battery backup keeps critical loads running (fridge, lights, internet, medical equipment).
Time-of-use rates: If your utility charges 2–3× more during peak evening hours (4–9 PM), a battery stores cheap midday solar and discharges during expensive peak hours. Savings: $20–$60/month in TOU arbitrage.
Reduced net metering (e.g., California NEM 3.0): When export credits are low, storing solar for self-consumption is worth far more than exporting. A battery maximizes the value of every kWh your panels produce.
Energy independence goal: If reducing grid dependence matters to you, a battery is the step between grid-tied and off-grid.

When NOT to add a battery: If you have full retail net metering, no TOU rates, reliable grid power, and no interest in outage backup — a battery does not improve the economics. The grid is effectively a free, infinitely sized battery via net metering.

See Solar Battery Sizing Calculator for battery bank sizing and String Inverter vs Microinverter for hybrid inverter options.

How Much Will Solar Save Over 25 Years?

Metric	Without solar	With solar (8 kW)
Year 1 electricity cost	$1,920	$300
Year 1 savings	—	$1,620
Electricity rate increase (3%/yr)	Compounds annually	Solar production stays flat
Year 10 annual cost	$2,510	$300 (grid fee)
Year 10 annual savings	—	$2,210
Year 25 annual cost	$3,850	$300 (grid fee + inverter replacement at yr 12)
Year 25 annual savings	—	$3,550
25-year total cost	$66,600	$7,500 (grid fees)
25-year total savings	—	$59,100
System cost (installed, 2026)	—	$20,000–$24,000
Net 25-year benefit	—	$35,000–$39,000

The key insight: Electricity rates increase over time (3 % annual average historically). Solar production stays flat (slight decline from degradation, offset by rate increases). Every year, solar saves more money than the year before. By year 10, solar saves over $2,200/year. By year 25, over $3,500/year.

See Are Solar Panels Worth It? for the full payback analysis and How Much Do Solar Panels Cost? for current pricing. Note: the federal Section 25D solar tax credit ended December 31, 2025 — all savings calculations in this guide reflect post-credit reality.

Common Misreadings

"Solar panels eliminate your electric bill." They reduce it by 60–100 %, but a $10–$20 monthly grid connection fee remains. A $0 bill is rare but a $12 bill is common.
"I can sell solar electricity and make money." Net metering gives you credits, not cash. Those credits offset your bill — which is effectively the same as selling at retail rate. True cash payouts (annual true-up remainders) are at wholesale rates: $0.02–$0.04/kWh.
"Net metering is the same everywhere." Net metering policies vary dramatically by state. California's NEM 3.0 credits are 70–80 % lower than full retail NEM in most other states. Check your state's policy before estimating savings.
"I should oversize my system as much as possible." Most utilities cap system size at 100–110 % of your annual usage. Producing more than you use on an annual basis wastes money because surplus credits are paid out at wholesale rates or forfeited.
"I need batteries for solar to work." For grid-tied systems with net metering, the grid IS your battery — and it is free, unlimited, and has no degradation. Batteries are for outage backup and TOU arbitrage, not for basic solar economics.

Bottom Line

Solar panels save $100–$200 per month on the average US electricity bill. Net metering is the mechanism that makes this work — your utility credits you for excess solar production, effectively letting you "bank" summer sunshine for winter nights. The higher your electricity rate, the more you save. Over 25 years, a typical 8 kW system saves $35,000–$40,000 after system cost — and that number grows as electricity rates continue rising.