Tools
Every SolarEvaluator calculator and converter in one place — all free, all in your browser.
AC/DC Adapter & Converter Calculator
Find the exact adapter, inverter, or converter for any device.
Open →📋Appliance Wattage Database
Look up the wattage of 140+ household appliances.
Open →🔋Battery Backup Calculator — How Long Will Your Battery Last?
Calculate how long any battery lasts under your load with runtime by appliance.
Open →🧰Battery Charge & Discharge Calculator — Free Tool
Charge rate, runtime, solar panel count, and inverter sizing for any battery.
Open →⚙️Electrical Unit Converter
Convert between volts, amps, watts, kWh, and other electrical units.
Open →💡Electricity Bill Calculator
Estimate your monthly electricity bill from your appliances.
Open →🧰EV Charging Cost Calculator
Free interactive solar tool.
Open →🧰Generator Sizing Calculator
Free interactive solar tool.
Open →🧰Inverter Size Calculator
Size your inverter with surge capacity for motor startup — enter appliances, get the kVA rating.
Open →🔁kVA to Watts Converter — Instant Calculation + Power Factor Table
Convert kVA to watts and watts to kVA at any power factor.
Open →🔌Load Shedding Battery Planner
Plan your battery backup for scheduled power outages.
Open →🧰Net Metering Calculator
Free interactive solar tool.
Open →📐Panel Output Calculator
See how much energy your solar panels produce per day, month, and year.
Open →🧰Solar Installation Cost Calculator
Estimate your total installed cost with incentives and cost per watt.
Open →🧰Solar Panel Angle Calculator
Find the optimal tilt angle for your solar panels by latitude with seasonal adjustments.
Open →📉Solar Panel Degradation Calculator
Model how panel output declines over 25 years.
Open →🧰Solar Panel Wire Size Calculator
Find the correct AWG wire gauge for every cable run in your solar panel system.
Open →🧰Solar Roof Space Calculator
See how many panels fit on your roof and the total system kW.
Open →💰Solar Savings Calculator
See your payback period and 25-year savings from solar panels.
Open →☀️Solar System Calculator — Size Panels, Battery & Inverter (Free)
Size your complete solar system — panels, battery, inverter, and controller from your appliance list.
Open →⛽Solar vs Generator Calculator
Compare the 25-year cost of solar versus a fuel generator.
Open →🧰Tools
Free interactive solar tool.
Open →🧰UPS Sizing Calculator
Free interactive solar tool.
Open →🧰Voltage Drop Calculator
Calculate voltage drop across any wire run — see drop percentage, power loss, and NEC compliance.
Open →🔧Wire Gauge Calculator — AWG Size for Any Current & Length
Find the correct cable AWG for any current, length, and voltage drop limit.
Open →