TOU Arbitrage
VPP Revenue
DSIRE Incentives
Solar Pairing
ITC Savings
Unlocks SGIP (CA), ConnectedSolutions (MA/RI), and VPP program eligibility.
Battery System Configuration
Tesla Powerwall 3: 13.5 kWh
Powerwall 3: 11.5 kW peak / 5 kW cont.
Virtual Power Plant (VPP) Enrollment
10‑Year Net Benefit (with VPP)
$0
Why This Battery Tool Is Impossible to Copy
We integrate four proprietary data layers that generic calculators lack:
- DSIRE Battery Incentives: SGIP (CA) up to $1,000/kWh, ConnectedSolutions (MA/RI) $200‑$400/kW, plus state tax credits.
- VPP Program Payouts: Tesla Electric ($0.50‑$2.00/kWh during events), OhmConnect device payments, and Eversource demand response rates.
- Time‑of‑Use Arbitrage Engine: Models daily cycling based on PG&E, SCE, SDG&E, and other major utility tariffs.
- Battery Degradation Curves: 10‑year capacity fade with warranty‑backed performance.
How Battery ROI Is Calculated
- Net Cost: Installed Price − Federal ITC (30% if solar‑paired) − State Rebate.
- TOU Arbitrage: Daily usable kWh × (peak − off‑peak rate) × 365 × efficiency.
- VPP Revenue: Events/year × (capacity kW × payout per kW or per kWh).
- Avoided Outage Cost: Value of lost load based on EIA data.
- Payback: Net Cost ÷ Total Annual Benefit.
Battery & VPP FAQ
Is Tesla Electric worth enrolling?
Tesla Electric pays $0.50‑$2.00 per kWh discharged during grid events. For a Powerwall, that can mean $300‑$800/year on top of TOU savings.
What is SGIP and do I qualify?
California's Self‑Generation Incentive Program offers up to $1,000/kWh for storage. Equity Resiliency adder increases it to $1,250/kWh.
Does battery qualify for 30% federal tax credit without solar?
Yes, standalone storage now qualifies for the 30% ITC under the Inflation Reduction Act, regardless of solar pairing.
How accurate are VPP earnings estimates?
We use historical dispatch frequency and rates from each program. Actual earnings vary ±20% based on grid conditions.