Solar Decision Engine

Does solar make sense for your home?

Three quick questions — location, electricity use, roof. You'll get a solar snapshot, a plain-English verdict, a cash / loan / battery comparison, an interactive 25-year projection and a sensitivity check. Every figure shows its assumptions.

Step 1 — Location

ZIP code

State

Utility (optional)

Step 2 — Electricity use

Average monthly bill

Annual use kWh (optional)

Target bill offset

Step 3 — Property

Do you own the home?

Usable roof sq ft (optional)

Roof faces

Shading

I'm interested in a home battery

Takes about 3 minutes. Uses average local sun hours, electricity rates and installed pricing for your state, a standard system derate, panel degradation and a 3%/yr utility escalation. Estimates only — not a quote or a guarantee of savings. Full methodology →

Your Solar Snapshot

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System size

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Annual production

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Annual savings

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Estimated payback

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25-year savings

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Fill in the form to see whether solar is worth it for your home.

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Step 4 — Compare your options

Cash vs loan vs solar + battery

Pay cash

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Gross cost—
Incentives—
Annual savings—
Payback—
25-year savings—
Est. return—

Solar loan

—/mo

Amount financed—
APR / term—
Net monthly impact—
Total financing cost—
25-year savings—

Solar + battery

— added

Battery size—
Backup for essentials—
Added annual savings—
Payback (system+battery)—

Step 5 — 25-year projection

What solar does to your energy spending

Cumulative cost with no solar vs. your net outlay with solar (system + any remaining bill). Drag the assumptions.

Electricity inflation 3.0%

Install price state avg

Loan APR 6.9%

Panel degradation 0.5%/yr

Utility rate state avg

Battery cost $1,000/kWh

Sliders re-run the model live. Reset by reloading the page.

Step 6 — Sensitivity

How sure is this?

The single biggest unknown is future electricity prices. Here's payback and 25-year savings across a plausible range.

Scenario	Payback	25-year savings

Step 7 — Installer matching

Qualified installers for your project

Want a human to explain this?

Ask the Solar Advisor a question, or get quotes from vetted local installers.

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