⚡ Solar Panel Cost Calculator

free

☀️ Your System Details

System size: 10.0 kWp(~25 panels · 17 m² roof area)

2 kWp30 kWp

Annual electricity use: 12,000 kWh

3,000 kWh30,000 kWh

Electricity rate: 18.0 ¢/kWh(US avg ~18 ¢ · CA ~30 ¢ · AU ~25–35 ¢)

8 ¢55 ¢

Export / net metering rate: 8.0 ¢/kWh(check your utility – varies widely)

0 ¢30 ¢

Region

Roof orientation

Roof pitch

Battery storage

Incentive / rebate: 0% of system cost

⚠️ US federal note: the 30% residential solar tax credit (IRA §25D) expired December 31, 2025 under the One Big Beautiful Bill — systems installed in 2026 get no federal credit (a 2025 install can still be claimed on Form 5695). Enter any state or utility rebate here — or, in Australia, your STC-equivalent percentage. Default 0 reflects no federal credit.

📊 Your Results

Annual Production & Self-Consumption

Specific yield1,650 kWh/kWp

Annual production16,500 kWh

Self-consumption (30 %)4,950 kWh

Grid export11,550 kWh

Self-sufficiency41 %

Net investment

$32,000

Gross $32,000

Annual savings

$1,815

Bills: $891 · Export: $924

Payback period

21 yrs

incl. 0.5 % degradation + maintenance

20-year profit

$-1,374

6.4 t CO₂ avoided/yr

Energy Split (Year 1)

Self-consumed4,950 kWh

Exported to grid11,550 kWh

Still from grid7,050 kWh

⚡ Pro Tip: Size it right

Aim for a system that covers 80–100 % of your annual usage. Going bigger earns more export income but may have diminishing returns if your utility pays less for excess. Adding a battery doubles self-sufficiency — ideal if your utility has reduced net metering rates. Note: the federal solar & battery tax credit expired Dec 31, 2025, but many state and utility storage rebates still apply in 2026.