Residential Solar Calculators
Size your home solar system — from panel count to roof fit to annual production.
67 calculators
☀ Solar Panel Calculator
How many panels does your home need? Enter your bill, get your answer.
🏠 How Many Solar Panels Do I Need
The #1 solar question. Bill in — panel count out.
⚡ Solar System Size Calculator
Calculate the right kW system for your home.
🏡 Solar Panel for Home Calculator
Home size to solar system size — quick estimate.
🏗 Solar Roof Calculator
How many panels fit on your roof?
🔌 Solar Power Calculator
How much power will your array produce?
⚡ Solar Energy Calculator
Estimate annual solar energy production.
📊 Solar Panel Output Calculator
Real-world output with temperature derating.
💡 Solar Panel Wattage Calculator
Calculate recommended wattage for your needs.
🔄 kW to Solar Panels Converter
How many panels for 5kW? 10kW? Any size.
📊 Panel Efficiency Calculator
Compare efficiency ratings and real output.
🌞 Peak Sun Hours Calculator
Find peak sun hours for your location.
📐 Solar Panel Tilt Calculator
Seasonal tilt angle optimization.
📐 Solar Panel Area Calculator
Calculate area needed for your system.
🌞 Solar Irradiance Calculator
Solar radiation data for your location.
🌓 Solar Shading Calculator
Estimate production loss from shading.
📊 Solar Panel Comparison
Compare two panels side-by-side: 25-year production, cost per kWh, and value winner.
🏛 Ground Mount Solar Calculator
Calculate land area, row spacing, and cost for ground-mounted solar arrays.
🏗 Solar Roof Load Calculator
Check if your roof can support the weight of solar panels and snow.
📐 Row Spacing Calculator
Calculate minimum panel row spacing to prevent inter-row shading.
🌡 Temperature Coefficient Calculator
See how heat reduces your panel output month by month.
🏠 Solar Pergola Calculator
Size a solar pergola: panels that fit, power output, and shade area.
❄ Snow Load & Winter Calculator
Assess snow weight on panels and estimate winter production losses.
📈 Panel Degradation Calculator
Project your panel output decline over 25 years.
☀ Bifacial Panel Calculator
Calculate rear-side energy gain from bifacial solar panels.
❄ Solar Mini Split Calculator
Size solar panels to power a ductless mini split heat pump.
💧 Solar Tankless Water Heater
Calculate solar offset for electric tankless water heaters.
🔌 Solar Dryer Calculator
How many panels to offset your clothes dryer's energy use.
🌡 Solar Space Heater Calculator
Solar offset for electric heaters with heat pump comparison.
🏠 Solar ADU Calculator
Size solar for accessory dwelling units with Title 24 compliance.
🐟 Solar Aquarium Calculator
Power your fish tank equipment with solar panels.
💧 Solar Dehumidifier Calculator
Solar offset for whole-house or basement dehumidifiers.
🔌 Solar Washing Machine Calculator
Solar panels for washing machine with water heating analysis.
💨 Solar Ceiling Fan Calculator
Size solar for DC or AC ceiling fans with AC savings estimate.
☀ Solar Tracker Calculator
Compare fixed vs single-axis vs dual-axis tracker production.
🏠 Balcony Solar Calculator
Size a plug-in balcony solar system for apartments.
📐 Wall-Mounted Solar Calculator
Calculate wall-mount panel production vs rooftop.
🌣 Solar Attic Fan Calculator
Size solar attic ventilation and estimate AC savings.
🌍 Solar + Geothermal Calculator
Combined net-zero HVAC system with solar and geothermal.
💨 Solar ERV Calculator
Energy recovery ventilation powered by solar panels.
❄ Solar Portable AC Calculator
Size solar for portable air conditioners.
☀ Solar Shingle vs Panel Calculator
Side-by-side cost and ROI comparison.
💧 Solar Thermosiphon Calculator
Passive solar water heating system sizing.
☀ Perovskite Solar Calculator
2026 tandem panel efficiency comparison vs silicon.
💧 Solar Sauna Calculator
Traditional and infrared sauna solar sizing.
🌡 Solar Radiant Floor Heating
BTU sizing for solar-powered heated floors.
🍷 Solar Wine Cellar Calculator
Constant 55°F cooling with solar panels.
📊 Solar Panel Brand Comparison
Compare 8 top panel brands by efficiency, warranty, and value.
📊 SunPower vs REC Panels
Premium panel head-to-head: efficiency, warranty, and 25-year value comparison.
📊 QCells vs Canadian Solar
Budget panel comparison with domestic content bonus eligibility.
📊 LG vs Panasonic vs REC
Premium panel 3-way comparison (includes LG discontinuation warning).
📊 Trina vs JA Solar vs LONGi
3-way Tier 1 panel comparison.
🌡 Solar + HVAC Combo Calculator
Bundled tax credit ROI for solar and HVAC systems.
☀ JinkoSolar Specs Calculator
World #1 panel manufacturer model selector: Tiger Neo, Cheetah, and Swan series specs.
☀ Aiko ABC Panels Calculator
All-Back-Contact premium aesthetic panel sizing.
☀ Q CELLS Q.PEAK Calculator
Premium TOPCon US-made domestic content panel sizing.
☀ Silfab Solar Panels Calculator
30yr warranty premium NA-made panel sizing.
☀ Risen Energy Calculator
HJT and TOPCon Tier 1 panel sizing.
☀ Astronergy Calculator
Bloomberg Tier 1 ASTRO Series panel sizing.
☀ Hyundai Solar Calculator
Korean engineering quality panel sizing.
☀ Maxeon Solar Panels Calculator
IBC technology with industry-leading 40-year warranty panel sizing.
☀ JA Solar DeepBlue Calculator
World #2 manufacturer DeepBlue series panel sizing.
☀ First Solar Thin-Film Calculator
CdTe utility-scale thin-film panel sizing and performance.
☀ Yingli Solar Calculator
Tier 1 value panel sizing with cost-per-watt analysis.
☀ Solaria PowerXT Calculator
Premium aesthetic full-black panel sizing for high-visibility roofs.
☀ Trina Vertex S+ Calculator
All-black HOA-compliant dual-glass panel sizing.
☀ Tongwei Solar Panels Calculator
Top-5 manufacturer HJT 700W flagship panel sizing.