Know Your Solar ROI Before You Buy
Free 25-year NPV analysis for solar, battery, and heat pump investments. Monte Carlo confidence intervals, IRA credit stacking, and optimal installation sequencing — powered by NREL and EIA data.
Free. No signup required. Data from NREL, EIA, IRS.
Engineering-Grade Analysis, Free
The same NPV, LCOE, and Monte Carlo methods used by energy economists — applied to your specific home and location.
25-Year NPV Analysis
Net present value of energy savings minus system costs, with configurable discount rates and utility escalation.
LCOE Calculator
Levelized cost of your solar energy vs. utility rates, accounting for 0.5%/yr panel degradation over 25 years.
Monte Carlo Simulation
Stochastic modeling of utility rate escalation (3-8%/yr historical range) across 5,000 scenarios for confidence intervals.
IRA Credit Stacking
Federal 30% ITC + state credits + utility rebates. Sequencing matters: some credits apply to net cost after others.
Optimal Sequencing
Which to install first: solar, battery, heat pump, or water heater? Each component changes baseline consumption.
TOU Arbitrage
Battery value modeling for time-of-use rate structures: charge during off-peak, discharge during peak hours.
How It Works
Enter Your Details
State, annual electricity usage, and current rate. Optional: roof area, budget, systems to evaluate.
Run the Analysis
Our engine runs NPV, LCOE, payback, credit stacking, sequencing, and optionally Monte Carlo.
Get Your Results
System sizing, net cost after credits, payback period, 25-year savings, and optimal installation order.
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Get your personalized 25-year NPV analysis with IRA credit stacking, Monte Carlo confidence intervals, and optimal electrification sequencing.
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