Solar Proposal Calculator Customer Inputs Title (for saving) Monthly electric bill (USD) Average monthly usage (kWh) Peak Sun Hours (hrs/day) — ask customer to provide Select components Panel — choose panel — Inverter — choose inverter — Battery (optional) — choose battery — Labor / Misc cost (USD) Calculate Save Proposal Results System size: – Monthly production: – Offset: – Estimated cost: – Yearly savings: – Payback (years): – ROI (25yr): – Save as PDF 25-year Production (chart) Add Panel