How many solar panels do I need to charge a Tesla Model Y?

For average U.S. driving (37 miles/day), the Model Y needs about 10-12 kWh/day. At 5 peak sun hours, you need 8-10 x 400W panels (3.0-4.0 kW system). In sunny states (6 PSH), 7-8 panels suffice. In cloudy states (4 PSH), plan for 10-12 panels. This offsets daily driving, not a full battery charge from empty.

How does the Model Y compare to the Model 3 for solar charging?

The Model Y uses about 8% more energy per mile than the Model 3 (0.27-0.31 kWh/mi vs 0.25-0.29 kWh/mi) due to its larger size, higher weight, and less aerodynamic profile. In practice, this means 1-2 more solar panels for the same driving distance. The Model Y needs roughly 3.0-4.0 kW of dedicated solar vs 2.8-3.5 kW for the Model 3.

How much does it cost to charge a Tesla Model Y per year?

At the U.S. average residential electricity rate of $0.165/kWh, charging a Model Y for average driving (37 mi/day, 13,500 mi/year) costs about $600-$720/year. In California ($0.30/kWh), it is $1,100-$1,300/year. Solar panels eliminate this recurring cost after a 5-7 year payback period.

Can I charge a Tesla Model Y with solar overnight?

With a standard grid-tied solar system and net metering: yes, effectively. Solar panels feed power to the grid during the day, earning credits. The Model Y charges from the grid overnight, using those credits. The net effect is solar-powered charging without needing battery storage. For true off-grid charging, you would need a home battery (like a Powerwall) to store daytime solar for nighttime EV charging.

How many miles does one solar panel add to a Tesla Model Y per day?

One 400W panel at 5 PSH produces about 1.66 kWh/day (400 x 5 x 0.83 / 1000). At the Model Y's average efficiency of 3.2-3.8 mi/kWh, that is about 5.3-6.3 miles per panel per day. Eight panels provide about 42-50 miles/day, more than the average U.S. commute.

Is the Tesla Model Y efficient enough for solar charging to make sense?

Absolutely. The Model Y is one of the most energy-efficient SUVs ever made. At 3.2-3.8 mi/kWh, it costs roughly one-third as much per mile as a comparable gas SUV (25 MPG). Even charged from the grid, the Model Y is cheaper to fuel than gas. With solar, the marginal fuel cost drops to zero after the panel payback period.

What size solar system do I need if I have two Tesla Model Ys?

Two Model Ys at average driving need about 20-24 kWh/day, requiring a 5.0-6.0 kW dedicated solar addition (13-15 x 400W panels). Most households with two EVs size a single larger solar system to cover house + both cars. A 10-12 kW system typically handles a moderate home (10,000 kWh/year) plus two EVs (7,000-8,000 kWh/year combined).

How Many Solar Panels To Charge A Tesla Model Y? (Calculator + Math)

The Tesla Model Y consumes 0.27-0.31 kWh per mile (EPA combined), slightly more than the Model 3 due to its larger size and crossover profile. At the average U.S. driving distance of 37 miles per day, that is 10-12 kWh/day. At 5 peak sun hours with the PVWatts derate of 0.83, you need 8-10 x 400W panels (a 3.0-4.0 kW system) -- roughly 1-2 more panels than the Model 3.

The Model Y is Tesla's best-selling vehicle and the most popular EV in the United States. Its slightly lower efficiency compared to the Model 3 comes from a taller ride height, larger frontal area, and about 300 lbs of additional weight. In solar terms, that translates to just 1-2 extra panels -- a minor difference that does not change the fundamental economics.

Quick Answer: Solar Panels For A Tesla Model Y

Peak sun hours	Daily kWh to offset	400W panels needed	System size
4 PSH (cloudy states)	10-12 kWh	10-12	3.8-4.8 kW
5 PSH (US average)	10-12 kWh	8-10	3.0-4.0 kW
6 PSH (sunny states)	10-12 kWh	7-8	2.5-3.2 kW

The math:

System kW = daily kWh / (PSH x 0.83)
Example: 11 kWh / (5 x 0.83) = 2.65 kW
Panels = 2,650W / 400W = 6.6 → 8 panels (round up for margin and winter)

Try The Calculator

Solar panel wattage

Type any value 10–750 W. Common sizes: 100 W (portable), 400 W (residential 2026), 580 W (commercial).

Peak sun hours per day

hrs

Don't know your PSH? Find your exact value →
Benchmarks: U.S. avg 4.98 · Phoenix 6.54 (highest) · Seattle 3.95 · Anchorage 3.17 (lowest). Above ~5.5 = sunny · 4.5–5.5 = average · below 4.5 = cloudy.

Daily kWh production

0.00kWh

Based on a 400W panel and 5.32 peak sun hours per day

Daily

1.60kWh

average across the year

Monthly

48kWh

× 30 days

Yearly

583kWh

× 365 days

Monthly production for a 400W panel — US Average

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

kWh per month · Source: NREL PVWatts v8

216 kg

CO₂ avoided per year

0.05

equivalent US homes powered

trees planted equivalent

$93

estimated annual savings

Tap to see sensitivity analysisSensitivity analysis

Sensitivity range
Scenario	Value
Low (-20%)	1.3 kWh
Expected	1.6 kWh
High (+20%)	1.9 kWh

Your daily production scales linearly with both panel wattage and peak sun hours. A 10% change in either input changes your result by 10%.

See production for your state Try the system size calculator

Tesla Model Y Energy Use By Driving Pattern

Daily miles	kWh/day (at 0.29 kWh/mi)	Annual kWh	400W panels (5 PSH)
20 mi (short commute)	5.8	2,117	4
30 mi (typical suburban)	8.7	3,176	6
37 mi (US average)	10.7	3,916	8
50 mi (medium commute)	14.5	5,293	9
75 mi (long commute)	21.8	7,939	14
100 mi (heavy driver)	29.0	10,585	18

Using 0.29 kWh/mi as a mid-range real-world estimate (between the Long Range at 0.27 and Performance at 0.31).

Model Y Efficiency By Trim

Model Y trim (2025)	EPA kWh/mi	EPA mi/kWh	Daily kWh (37 mi)	Annual kWh
Long Range (RWD)	0.27	3.8	9.7	3,548
Long Range (AWD)	0.28	3.6	10.2	3,723
Performance (AWD)	0.31	3.2	11.3	4,124

The Long Range RWD (rear-wheel drive) is the most efficient Model Y variant. The Performance model consumes about 15% more energy due to larger wheels, stiffer suspension, and a more powerful motor. That 15% gap translates to about 1-2 extra solar panels.

Real-World Efficiency Factors

The EPA numbers are tested under controlled conditions. Your actual efficiency will vary:

Factor	Effect on kWh/mi	Impact
Cold weather (under 32F)	+25-35%	Biggest factor. Battery heating and cabin heat draw 2-4 kW extra.
Highway at 75+ mph	+15-25%	Aerodynamic drag increases with speed squared.
Hot weather with AC	+10-15%	AC compressor draws 1-2 kW. Less impact than heating.
Hilly terrain	+5-15%	Uphill adds energy; regenerative braking recovers some downhill.
City driving (stop and go)	-5-15% (better)	Regenerative braking is very effective in city driving.
Mild weather (60-80F)	-5-10% (better)	Minimal HVAC draw, battery at optimal temperature.

For solar sizing, the annual average matters more than any single day. Cold winters and hot summers roughly cancel out if you drive year-round. Use the EPA combined rating as your baseline.

Winter sizing note: If you live in a cold northern climate, your Model Y may use 0.35-0.40 kWh/mi in January. But winter is also when solar production is lowest. The annual math still works because summer overproduction (more sun + more efficient EV) compensates for winter underproduction. Net metering banks your summer surplus for winter use.

Model Y vs Model 3: Solar Panel Comparison

Spec	Model 3 LR	Model Y LR	Difference
EPA efficiency	0.25 kWh/mi	0.27 kWh/mi	Model Y uses 8% more
Daily kWh (37 mi)	9.3	10.0	+0.7 kWh/day
Annual kWh	3,375	3,645	+270 kWh/year
400W panels (5 PSH)	6-7	7-8	+1 panel
Annual grid cost ($0.165/kWh)	$557	$602	+$45/year
Solar system size	2.3 kW	2.5 kW	+0.2 kW

The bottom line: the Model Y needs about 1 more panel than the Model 3. The annual cost difference at grid rates is roughly $45 -- not significant enough to influence a buying decision between the two vehicles.

Annual Charging Cost: Grid vs Solar

Scenario	Grid cost/year	Solar upfront	Payback	25-year savings
US avg rate ($0.165/kWh)	$646	$3,200-$4,000	5.0-6.2 yr	$12,150-$12,950
California ($0.30/kWh)	$1,175	$3,200-$4,000	2.7-3.4 yr	$25,375-$26,175
Texas ($0.14/kWh)	$548	$3,200-$4,000	5.8-7.3 yr	$10,500-$11,300
New York ($0.22/kWh)	$861	$3,200-$4,000	3.7-4.6 yr	$17,325-$18,125

Solar costs assume panels added to an existing system (incremental cost at roughly $2.50-$3.00/watt for the add-on). A standalone system costs more due to fixed inverter, permitting, and installation overhead.

Vs gasoline: A comparable gas SUV (25 MPG) at $3.50/gallon costs $1,890/year for 13,500 miles. The Model Y charged from the grid saves $1,244/year at average rates. Charged from solar, the savings climb to $1,890/year (the full gas cost) once the panels are paid off.

How Many Additional Panels If You Already Have Solar

Additional kW = (house kWh/yr + EV kWh/yr - current solar kWh/yr) / (PSH x 365 x 0.83)

Example 1: Home uses 10,000 kWh/year. Existing 7 kW system produces 10,600 kWh/year. Adding Model Y (3,916 kWh/year).

Total demand: 10,000 + 3,916 = 13,916 kWh/year
Shortfall: 13,916 - 10,600 = 3,316 kWh/year
Additional kW: 3,316 / (5 x 365 x 0.83) = 2.19 kW
Panels: 2,190 / 400 = 5.5 → 6 panels

Example 2: Home uses 12,000 kWh/year. Existing 5 kW system produces 7,600 kWh/year. Adding Model Y.

Total demand: 12,000 + 3,916 = 15,916 kWh/year
Shortfall: 15,916 - 7,600 = 8,316 kWh/year
Additional kW: 8,316 / (5 x 365 x 0.83) = 5.49 kW
Panels: 5,490 / 400 = 13.7 → 14 panels

In Example 2, the existing system was already undersized for the house, so the EV addition requires a much larger expansion.

Charging Setup Considerations

Level 2 is the standard for home charging. The Tesla Wall Connector (48A, 11.5 kW) charges the Model Y's 75 kWh battery from 20% to 80% in about 4 hours. For daily driving (10-12 kWh), it takes about 1 hour. The Mobile Connector at 32A/240V (7.7 kW) takes about 1.5 hours for daily driving -- perfectly adequate for overnight charging.

Schedule charging for off-peak hours. If you have time-of-use rates, set the Tesla to charge between midnight and 6 AM when rates are lowest. This does not affect your solar math (net metering credits from daytime solar offset the nighttime charging regardless) but may save money if your utility credits exports at a lower rate than the import cost.

Consider a Powerwall if net metering is poor. Under California NEM 3.0 and similar reduced-export-value programs, storing daytime solar in a battery and charging the EV at night from the battery avoids the unfavorable export/import spread. This adds $10,000-$15,000 for a Powerwall but improves the economics when export credits are worth less than 75% of import rates.