Benchmark Your Solar Install
The average US residential solar installation costs $2.85 per watt before incentives according to SEIA data. Enter your system details to compare output, savings, payback period, net metering credits, degradation, and cost per watt against national and state averages.
Last updated: May 2026
A solar installation benchmark evaluates your system against expected performance including energy generation, self-consumption ratio, cost per watt, and payback timeline. Performance Ratio = Actual Output ÷ Expected Output (PVWatts) × 100. Performance Ratio typically target 90%+.
📊 Your visitors see this on your website. Solar and energy companies embed this tool to generate leads — homeowners calculate savings and you capture their property details automatically. See plans →
↑ This is exactly what your website visitors see when you embed this tool. The only difference: their results are gated behind an email capture form, and every input is sent to your CRM.
What is Solar Installation Score?
A solar installation benchmark evaluates your system against expected performance including energy generation, self-consumption ratio, cost per watt, and payback timeline.
The Formula
Performance Ratio = Actual Output ÷ Expected Output (PVWatts) × 100
Worked Example
An 8kW system in Charlotte, NC expected to generate 11,200 kWh/year (PVWatts estimate). Actual: 10,500 kWh. Self-consumption: 50%.
- Performance ratio: 10,500 ÷ 11,200 = 94%
- Self-consumption vs 55% target: 50/55 = 91%
- Annual saving: 10,500 × $0.12 × 0.50 self + 10,500 × $0.12 × 0.50 net metering = $1,260
- Net cost $14,000 (after 30% ITC) ÷ $1,260 = 11.1 year payback
📌 The system performs at 94% efficiency with an 11.1-year payback — within normal range for a $0.12/kWh rate. Self-consumption improvement or a higher-rate utility would shorten payback.
Why This Matters
Return on investment
Every 5% improvement in self-consumption ratio saves $100-200 annually by avoiding grid electricity purchases at full retail rate rather than receiving net metering credits.
System health
Performance dropping below 80% of PVWatts expected output indicates panel degradation, new shading, soiling, or inverter/optimizer problems. Most manufacturers warrant 85% output at year 25.
Battery decision
Low self-consumption ratios suggest a battery would capture excess generation for evening use, especially in states moving away from full retail net metering like California (NEM 3.0).
Common Mistakes
❌ Comparing across different climates
An 8kW system in Phoenix generates 14,000+ kWh/year while the same system in Seattle generates 9,000 kWh. Always benchmark against NREL PVWatts for your specific zip code, not national averages.
❌ Ignoring seasonal variation
US solar generates 60-70% of annual output between April-September. Winter performance is naturally much lower, especially in northern states. Net metering credits banked in summer offset winter shortfalls.
❌ Using gross generation only
Self-consumption ratio matters more than total generation. 10,000 kWh at 60% self-use beats 13,000 kWh at 30% because self-consumed kWh avoid the full retail rate while exported kWh may earn less.
Industry Benchmarks
| Category | Good | Average | Poor |
|---|---|---|---|
| Performance Ratio | 90%+ | 80-90% | Below 75% |
| Self-Consumption | 55%+ | 35-55% | Below 25% |
| Payback Period (post-ITC) | Under 7 years | 7-10 years | Above 12 years |
Source: NREL PVWatts, EnergySage & SEIA 2026
Benchmark data sourced from NREL PVWatts, EnergySage & SEIA 2026.
From analyzing embed performance across hundreds of websites, businesses that replace static forms with interactive tools like this one see 3-5x more qualified leads — visitors volunteer their data because they get personalized results in return.
One of the most common mistakes we see when working with clients: comparing across different climates. An 8kW system in Phoenix generates 14,000+ kWh/year while the same system in Seattle generates 9,000 kWh. Always benchmark against NREL PVWatts for your specific zip code, not national averages.
Embed This Benchmark on Your Website
Every visitor who uses your embedded benchmark becomes a qualified lead. Their inputs, results, and business data are captured and sent to your CRM — before you ever pick up the phone.
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