Calculate annual True-Up bills and battery storage ROI under avoided-cost export rates and peak evening Time-of-Use (TOU) tariffs.
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NEM 3.0 Solar Battery Self-Consumption & True-Up Calculator — Calculations use publicly available benchmarks and are for education. Verify with a licensed professional. Primary sources: DOE · EPA · EIA.
Groundwork cites energy.gov, epa.gov, eia.gov directly in methodology. No sponsored bias.
NEM 3.0 Solar Battery Self-Consumption & True-Up Calculator is an open decision utility designed to provide initial quantitative clarity across personal finance, home infrastructure, and lifestyle trade-offs. Calculations are non-deterministic screening tools and do not constitute fiduciary, legal, or medical advice.
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<a href="https://gworky.com/tools/nem3-solar-battery-calculator" target="_blank" rel="noopener">Calculated via Groundwork NEM 3.0 Solar Battery Self-Consumption & True-Up Calculator</a> • <a href="https://gworky.com/citations" target="_blank" rel="noopener">View 2026 Benchmark Methodology</a>
</p>Calculate your annual True-Up bill and battery ROI under avoided-cost export rates and peak evening TOU tariffs.
US average is ~28–32 kWh/day (~900 kWh/month)
0 kWh (No Battery) · 13.5 kWh (1 Unit) · 27 kWh (2 Units)
4 PM to 9 PM utility rate (PG&E / SDGE / SCE)
Avoided cost wholesale rate paid for excess day exports
True-Up bill drops from $2,451 (Solar Only) to $1,017 (Solar + Battery).
| Tier / Setup | Solar Array | Storage | Solar Only True-Up | With Battery True-Up | Action |
|---|---|---|---|---|---|
| Modest Home / Starter | 6 kW | 10 kWh | $1,380/yr | $290/yr | Apply |
| Suburban Median (1 Battery) | 8 kW | 13.5 kWh | $1,950/yr | $410/yr | Apply |
| High Consumption + EV | 11 kW | 20 kWh | $2,890/yr | $620/yr | Apply |
| All-Electric Home (2 Powerwalls) | 14 kW | 27 kWh | $3,740/yr | $780/yr | Apply |
Residential battery storage systems of 3 kWh or greater qualify for the 30% Federal Residential Clean Energy Credit, even when installed without new solar panels. Under NEM 3.0, programming your battery inverter for "Self-Supply / Arbitrage" rather than pure backup is essential to maximize payback speed.