Battery + VPP Calculator
See how APS Virtual Power Plant earnings and incentives make batteries the highest-ROI clean energy investment in Arizona
Virtual Power Plant (VPP) — Your Battery Earns Money
APS dispatches your battery during peak grid demand events (~15 times/year). You earn $150-$500/year while keeping backup power for emergencies. The grid gets cleaner, you get paid.
Battery Configuration
Size your battery and toggle VPP to see the earnings impact
Usable capacity: 12.8 kWh (95% DoD)
Earn $150-$500/yr from APS grid services
Battery charges from solar — zero charging cost
Your Battery ROI
Net Cost
$4,228
Gross: $12,825
Year 1 Earnings
$1,025
$1.92/day arbitrage
Payback
4.3 yrs
Within warranty!
10-Year Total
$9,524
ROI: 125.3%
Incentive Stack — 67% Off
The 30% federal battery ITC applies to standalone batteries (no solar required). Available through 2032.
VPP Earnings Detail
15
Events/Year
$22
Per Event
$325
Annual VPP
APS dispatches your battery during extreme heat peak demand. Each event uses ~50% of capacity. Your home remains protected — battery refills overnight.
Annual Battery Earnings Breakdown
10-Year Battery Net Position
APS Rates Used: Peak (4-7pm) $0.3439/kWh summer, $0.2145/kWh winter. Off-peak $0.1235/kWh. Summer spread: $0.2204/kWh.
Assumptions: 90% round-trip efficiency, 2% annual degradation, 10-year warranty period. VPP: ~15 events/year.
Disclaimer: Battery ITC (30%) requires tax liability to claim. VPP program terms subject to APS approval and may change. Rebate availability is first-come, first-served.
Learn More About Batteries & VPP in Arizona
Tesla Powerwall 3 vs EcoFlow DELTA Pro Ultra — Arizona 2026
| Tesla Powerwall 3 | EcoFlow DELTA Pro Ultra | |
|---|---|---|
| Capacity | 13.5 kWh | 6 kWh (expandable to 90 kWh) |
| Peak Output | 11.5 kW | 7.2 kW |
| Estimated Cost | ~$12,500 installed | ~$3,599 (base unit) |
| After 30% ITC | ~$8,750 | ~$2,519 |
| APS VPP Compatible | Yes — earn ~$325/yr | No |
| APS Cool Reward Rebate | $3,750 | N/A |
| Net Cost (APS) | ~$4,228 | ~$2,519 |
| SRP Demand Shaving | Yes | Yes |
| Whole-Home Backup | Yes | Partial (expandable) |
| Warranty | 10 years | 5 years |
| Best For | Max ROI on APS, VPP earnings | Budget entry, portability, SRP |
Specs and prices are estimates from manufacturer published data as of March 2026. Verify current pricing and warranty terms directly with each manufacturer.
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