Interactive • Savings Model

Solar + Battery PPA Savings & ROI Estimator

Adjust real‑world assumptions to see how a USSE solar PPA with optional battery can reduce cost and risk over time.

Jump to Calculator Request Detailed Assessment

Model Your Scenario

Load & Rates
Solar System
Battery (Optional)
Get Detailed Engineering Model

Year 1 Savings

$0

Utility baseline vs PPA (incl. battery).

25‑Yr Cumulative*

$0

Nominal total over term.

NPV (@ 7 % Disc.)

$0

Present value of savings.

IRR vs. Status Quo

—

Return on avoided spend stream.

Solar Offset

0%

% of load served by solar.

*Cumulative assumes no degradation (add ~0.5%/yr if you want conservatism).

Methodology Snapshot

  • Baseline utility cost = Load × Rate escalating annually.
  • Solar production = kW × Production Factor (no degradation currently).
  • PPA payment = Solar Production × PPA Rate (with annual escalator).
  • Battery savings = Demand component reduction only.
  • Annual savings = Baseline − (PPA + Residual − Battery Savings).
  • NPV discounted at 7 %; IRR on savings stream (no upfront cost).