Solar Savings Calculator for Solar Installers

The form your customers fill out

A live calculator, not a static quote request. Your customer enters their details and watches the number update on the spot, which is what turns a browser into a booked job.

What it calculates

System size sized from the monthly bill and local sun hours
First-year savings, payback period, and 25-year net savings
Federal tax credit and local incentives applied from your tables
Utility rate escalator compounded over the system life
Homeowner lead with bill and projected savings drops into your dashboard

Why it closes more deals

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A live number closes deals

Customers who see a real estimate the second they enter their details are far likelier to book than ones told to call for a quote. The number is the hook.

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Runs your most complex spreadsheet

Multi-tab workbooks, lookup tables, tiered rates, conditional line items, the lot. If the math runs in Excel, CalcForms runs it behind a clean form.

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Update it by chatting

Prices move. Ask Claude to change a rate, add an option, or insert a step and the live form updates in seconds. No developer, no redeploy.

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Backtest before you publish

Run your last 20 real jobs through it and tune the formula until the live estimate matches what you actually charge. Ship it once it lines up.

How this form was built

No template builder and no code. One message to Claude with the CalcForms connector switched on:

✦ Claude with the CalcForms connector

Build a solar savings calculator. Inputs: average monthly electric bill, roof direction (south 1.0x, east/west 0.85x, north 0.6x production), shading (none 1.0x, some 0.85x, heavy 0.65x), roof type, and ownership. Size the system from the bill at $0.16/kWh and 4.5 sun hours, apply the production multipliers, apply the 30% federal tax credit, escalate the utility rate 3% a year, and show the homeowner first-year savings, payback in years, and 25-year net savings. Keep my install cost per watt and margin internal.

Done. I built Solar Savings Calculator with your pricing and deployed it to forms.badabingapp.cc. The math runs server-side and every submission is saved with the inputs and email. Want to add a field or change a rate? Just tell me.

Build this exact form

CalcForms is a connector you add to Claude once. After that you build and edit forms just by chatting.

Add CalcForms to Claude. Open the Add custom connector dialog, name it Calcforms, and paste https://forms.badabingapp.cc. One time, about 60 seconds.
Paste the prompt below. Claude builds the form, wires in your math, and hands you a live URL.
Share it, then tweak by chatting. Put it on your site or send the link. Change a rate or add a field later just by asking.

Copy this prompt into Claude

"Build a solar savings calculator. Inputs: average monthly electric bill, roof direction (south 1.0x, east/west 0.85x, north 0.6x production), shading (none 1.0x, some 0.85x, heavy 0.65x), roof type, and ownership. Size the system from the bill at $0.16/kWh and 4.5 sun hours, apply the production multipliers, apply the 30% federal tax credit, escalate the utility rate 3% a year, and show the homeowner first-year savings, payback in years, and 25-year net savings. Keep my install cost per watt and margin internal."

Example run: A $220/month bill on a south-facing unshaded roof sizes near a 7.5 kW system, about $1,900 first-year savings, roughly 8-year payback, and about $52,000 net over 25 years.

New to connectors? A connector (an MCP server) is a secure link between Claude and an app. The CalcForms connector lets Claude build, deploy, and update real calculator forms for you, all from the chat window.

Formulas it supports

system size from bill
production multipliers
PMT for loan option
30% tax credit
3% rate escalator over 25 years

FAQ

Does it apply the federal tax credit and local incentives?

Yes. The 30% federal credit and any local rebates live in your model and apply automatically. Update them by asking Claude when programs change.

Can it show a loan option, not just cash?

Yes. Add ownership as an input and the form uses PMT to show the monthly loan payment against the new lower utility bill.

Does the homeowner see my cost per watt?

No. They see savings, payback, and the 25-year number. Your install cost per watt and margin stay internal, chosen per field.

Can I validate it against deals I have closed?

Yes. Backtest it against past installs by entering their bills and confirming the projected savings line up with what those systems actually produced.

Build yours in the next 10 minutes.

Your first form is free. No credit card.

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