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Net Metering Value Calculator
Net metering lets rooftop solar receive retail or near-retail credit for excess generation.
Annual solar value
$41,250
On-site value
$26,250
Export value
$7,000
How the math works
On-site = consumption × retail. Export = export × retail × NEM %. + demand reduction.
250k × 75% × $0.14 + 250k × 25% × $0.14 × 80% + $8,000 = $26,250 + $7,000 + $8,000 = $41,250.
How to Use
- Enter annual solar production kWh.
- Enter on-site consumption %.
- Enter retail rate.
- Enter net metering credit rate %.
- Enter demand charge reduction.
- Read annual solar value.
Frequently Asked Questions
Net metering structure?
Traditional 1-for-1 net metering: excess solar exported at retail rate ($0.10-0.30/kWh). Value of solar tariff: credit at calculated 'value' (often 70-90% of retail). Time-of-use rate: export credit based on time-of-day (lower off-peak, higher on-peak). Feed-in-tariff (FiT): pre-set rate. California NEM 3.0: export rate ~25-40% of retail — major compression.
NEM policy landscape?
California NEM 3.0 (2023): export credit cut 75-85% from NEM 2.0. Retroactive grandfathering. Hawaii: no net metering since 2015 (self-supply only). Nevada: partial net metering. Arizona: compensation near retail. Florida, Texas: varies by utility. Rollback trend: utilities lobby for less favorable terms citing 'cost shift'. Solar customers impacted financially; many opting for battery storage to self-consume.
Battery addition?
Battery + solar: self-consume more, export less, avoid unfavorable export rates. Battery cost: $8-20k residential, $100-500k commercial. ITC 30% applies if paired with solar. Capacity: 10-15 kWh residential, 50-500 kWh commercial. Offsets: 60-90% of previously exported kWh. Combined system: restore ~70-85% of pre-NEM-3 economics in affected markets.
Commercial value?
Commercial buildings: high on-site consumption during daytime solar production = minimal export. Demand charge reduction: solar + battery can cut peak demand charges $5-40/kW-month. Often bigger than energy savings. Whole-building NEM analysis critical. REC + ITC + energy + demand = 4-component value stack. Project ROI driven primarily by demand reduction in commercial vs retail credits in residential.
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