All tools, guides and languages
Find a calculator or browse the source-linked guides. International tools use your entered assumptions; US utility guidance remains separate.
English solar and energy calculators
- calculators
- calculators / system size
- calculators / solar savings
- calculators / payback
- calculators / lease vs buy
- calculators / battery
- calculators / loan
- calculators / net metering
- calculators / bill savings
- calculators / solar potential
- calculators / tou optimizer
- calculators / solar ev
- calculators / backup loads
- calculators / quote checker
- calculators / shading loss
- calculators / heat pump
- calculators / carbon impact
- calculators / energy
Português (Brasil)
- pt br
- Calculadora de consumo de energia
- Calculadora de painéis solares: tamanho e quantidade
- Calculadora de autonomia da bateria
- Calculadora de geração solar: kWh por ano e por dia
- Calculadora de recarga: consumo e custo do carro elétrico
- Calculadora de payback solar e retorno simples
- Simulador de financiamento solar: parcela e juros
Español (México)
- es mx
- Calculadora de consumo de energía
- Calculadora de paneles solares: tamaño y cantidad
- Calculadora de autonomía de batería
- Calculadora de producción solar: kWh al año y al día
- Calculadora de carga: consumo y costo del auto eléctrico
- Calculadora de recuperación de inversión solar
- Calculadora de financiamiento solar: pago e intereses
Deutsch (Deutschland)
State solar guides
- states
- states / california
- states / texas
- states / florida
- states / new york
- states / massachusetts
- states / arizona
- states / new jersey
- states / nevada
- states / hawaii
- states / maryland
- states / connecticut
- states / rhode island
- states / south carolina
- states / georgia
- states / north carolina
- states / virginia
- states / new mexico
- states / oregon
- states / washington
- states / illinois
- states / minnesota
- states / pennsylvania
- states / utah
- states / ohio
- states / michigan
- states / wisconsin
- states / indiana
- states / missouri
- states / tennessee
- states / kentucky
- states / arkansas
- states / louisiana
- states / oklahoma
- states / kansas
- states / nebraska
- states / iowa
- states / south dakota
- states / north dakota
- states / montana
- states / wyoming
- states / idaho
- states / maine
- states / new hampshire
- states / vermont
- states / delaware
- states / alabama
- states / mississippi
- states / west virginia
- states / alaska
- states / colorado
City solar guides
- solar / phoenix az
- solar / los angeles ca
- solar / san diego ca
- solar / houston tx
- solar / dallas tx
- solar / miami fl
- solar / orlando fl
- solar / tampa fl
- solar / new york ny
- solar / denver co
- solar / las vegas nv
- solar / albuquerque nm
- solar / tucson az
- solar / atlanta ga
- solar / charlotte nc
- solar / seattle wa
- solar / portland or
- solar / chicago il
- solar / boston ma
- solar / philadelphia pa
- solar / minneapolis mn
- solar / nashville tn
- solar / austin tx
- solar / san antonio tx
- solar / sacramento ca
- solar / san jose ca
- solar / salt lake city ut
- solar / baltimore md
- solar / washington dc
- solar / jacksonville fl
Utility billing guides
Solar articles
- blog
- Why Is My Electric Bill Still High After Solar Panels?
- Solar Loan Dealer Fees: Compare Cash Price and Financed Cost
- How to Calculate Appliance Electricity Use in kWh
- How Many Solar Panels Do I Need? A Simple 2026 Guide
- Solar Payback Period Explained (With Real Numbers)
- Time-of-Use Rates and Solar: What Changed and Why It Matters
- Is Solar Still Worth It in 2026? The Honest Answer.
- How to Compare Solar Quotes: The Only 5 Numbers That Matter
- Home Battery Backup Sizing: Usable kWh, Power and Runtime
- Solar Shading Loss: Trees, Roof Obstacles & Inverters
- Heat Pump + Solar: Sizing, Costs & Savings (2026)
- How Long Do Solar Panels Last? Lifespan & Degradation
- Solar Panel Degradation Rate & 25-Year Savings
- Community Solar vs Rooftop Solar: Which Is Right for You?
- Solar for Renters: 5 Options Without a Rooftop
- Net Metering by State (2026): Export Credit Guide