How to Calculate Solar Panel Savings in 2026
Solar panel costs have dropped 70% in the last decade, and the 30% federal tax credit makes now a great time to go solar. Here's how to calculate your savings.
What Affects Your Solar Savings?
- Electricity rates: Higher rates = bigger savings
- Sun exposure: More sun = more energy production
- System size: Larger systems offset more usage
- Electricity usage: Higher bills mean more potential savings
- Net metering: How your utility credits excess power
- Roof orientation: South-facing is best
Step 1: Calculate Your Current Annual Electricity Cost
Look at your last 12 months of utility bills. Add up the total. If you don't have that, estimate: Average monthly bill × 12 = Annual cost.
Example: $175/month × 12 = $2,100/year
Step 2: Estimate System Size Needed
A simple rule: Every 1 kW of solar produces 1,200-1,500 kWh per year in most of the US.
Example: Using 10,000 kWh/year ÷ 1,350 = 7.4 kW system needed
Step 3: Estimate System Cost
As of 2026, residential solar costs about $2.50-3.50 per watt before incentives:
- 5 kW system: $12,500-$17,500
- 7 kW system: $17,500-$24,500
- 10 kW system: $25,000-$35,000
Step 4: Calculate Federal Tax Credit
The federal Investment Tax Credit (ITC) gives you 30% of your system cost back as a tax credit through 2032.
Example: $20,000 system × 30% = $6,000 credit
Net cost after credit: $20,000 - $6,000 = $14,000
Step 5: Calculate Payback Period
Divide your net cost by annual electricity savings:
Payback Period = Net System Cost ÷ Annual Electricity Savings
Example: $14,000 ÷ $2,100 = 6.7 years
Beyond Electricity Savings
Additional financial benefits to consider:
- Increased home value: Solar adds 4-6% to home value
- Maintenance savings: No fuel costs, minimal maintenance
- Protection against rate hikes: Lock in "generation cost"
- State incentives: Many states offer additional rebates
💡 Pro Tip
Use our free solar savings calculator to get personalized estimates based on your actual electricity usage, roof size, and location.
Is Solar Right for You?
Solar makes sense if:
- You own your home and plan to stay 5+ years
- You have good sun exposure (south or west roof)
- Your electricity bills are high ($150+/month)
- Your roof is in good condition (25+ year lifespan)
Consider alternatives if you rent, have significant shade, or plan to move soon.