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CLUSTER SOLAR-WEB-ENERGY · 42 ENTRIES · EARLIEST ENTRY 2025-05-16

Solar savings and sizing calculators

This cluster consists of web and mobile tools that estimate solar energy potential, size PV and battery systems, and calculate savings, payback, and ROI for residential, RV, and commercial users. The dated history is thin: one entry in April 2023, followed by single entries in May 2025, June 2025, October 2025, and May 2026, showing no clear trend before the index began. All traction leaders (urja-saathi, voltsage-testing, solar-savings-calculator-sp-new-view) have zero stars, indicating minimal user engagement or visibility.

Entry timeline

ENTRY TIMELINE

APR 2023: 1MAY 2025: 1JUN 2025: 1OCT 2025: 1MAY 2026: 1AUG 2026: 27SEP 2026: 10
APR 2023SEP 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 9 ai-built · 11 unlabelled

Operator · 4 hobby · 3 indie · 2 commercial · 1 open source · 10 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 20 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01solar-roof-planner0★9 dayslivehobbyHomeowner solar planning tool that simulates household energy use and places rooftop panels based on location, pitch, shading, and equipment choices.
  2. 02elite-electric-solar-calculator0★23 dayslivecommercialWeb calculator that estimates solar panel and battery system sizing and costs for homeowners, tailored for a solar company.
  3. 03solar-estimate-pro0★28 daysliveSolar estimator that calculates costs and savings for rooftop solar installations.
  4. 04pvCalculator0★26 daysliveWeb app that calculates solar photovoltaic system sizing and energy output for users considering solar panels.
  5. 05urja-saathi0★1 mo—ai-builtConsumer website for residential rooftop solar that provides a savings calculator, lead forms, FAQ, and blog to prospective customers.
  6. 06voltsage-testing0★1 mo—hobbyWeb application that provides solar power system sizing and planning tools for homeowners and installers to size solar equipment needs.
  7. 07solar-savings-calculator-sp-new-view0★5 mo—ai-builtWeb app that estimates cost savings from installing solar panels based on user-provided energy usage and location.
  8. 08solXpect0★9 mostaleliveopen sourceMobile app that forecasts a home solar power system's energy output using solar radiation and weather forecast data.
  9. 09geo-sun-scan0★11 mostale—ai-builthobbyWeb app that analyzes a location's geographic and solar data to estimate sunlight exposure for solar planning.
  10. 10SolarSync0★1 yrabandoned—indieSolar energy management app that analyzes uploaded utility bills and generation reports to calculate savings, efficiency, and long-term financial trends for homeowners.
  11. 11sunny-roof-estimator0★1 yrabandoned—ai-builtWeb app that estimates the solar potential of a roof for homeowners researching solar panels.
  12. 12Calculadora Solar | Corey Solar0★unknownliveWeb app that calculates household energy consumption and recommends solar panel options tailored to the user's needs.
  13. 13Solar Budget Estimator0★unknownliveai-builthobbyWeb app that estimates the size and cost of a solar system that fits within a user's current electricity budget.
  14. 14ChargeRight: Master Electrician's $12.99 EV Panel Assessment (NEC 220.82)0★unknownliveindiePaid web tool that runs a certified electrical load calculation on a home panel to check EV charger compatibility for homeowners.
  15. 15Fensterkraftwerk Planer – Kostenloses Solar-Planungstool0★unknownliveai-builtBrowser tool that visually plans balcony solar panel layouts and calculates energy yield and return on investment.
  16. 16Calculadora solar0★unknownliveWeb app that estimates savings and payback period for home solar panel installations.
  17. 17Solar Land Assessor GPT | Free AI Tool for Solar Property Analysis | AI Web Tools0★unknownliveai-builtindieAI tool that analyzes solar energy potential for a property and provides site evaluation.
  18. 18Solar Savings Estimator - Arrow Roofing Services0★unknownliveai-builtcommercialWeb tool that estimates potential solar energy savings for homeowners considering a roofing company's solar installation service.
  19. 19Simulateur Solaire - Calcul Puissance et Exposition Toiture0★unknownliveSolar simulator that calculates roof power and exposure for solar panel installations.
  20. 20Fotovoltaico Industriale0★unknownliveai-builtTool to configure industrial photovoltaic systems and estimate power output, investment, ROI, and incentives.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.