Solar Calculators
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Solar, EV & Home Energy Calculators & Converters
Solar, EV & Home Energy Calculators & Converters
EV charging time, range, cost comparison, and battery degradation calculators for EV drivers, owners, and installers planning home or public charging.
Who This Is For
An electric vehicle decision is usually four separate math problems that get mashed into one: how far the car actually goes in your weather, how long a charge takes at the power you can get, what that energy costs, and whether the house panel can accept a charger. These seven tools keep those problems on separate pages so the formula on each page stays honest. EnterPlanet LLC built them for drivers, homeowners adding a circuit, and students comparing a window-sticker range to a winter highway trip. Read the full guide ↓
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The EV Range Calculator starts from a rated efficiency and then applies speed, temperature, climate control, and load. Environmental Protection Agency and similar lab cycles are measured in mild, controlled conditions. Highway speed raises aerodynamic drag with the square of velocity. Cabin heat in freezing weather is a real kilowatt-hour load, and a heat pump wastes less of that energy than a resistive heater. Use this page for a trip. Use Battery Degradation for the pack over years of calendar aging, mileage, and DC fast-charging habits. Those are not the same question.
Charging time is limited by the lower of charger power and the vehicle's acceptance rate, and DC fast charging tapers after about 80 percent. That is the Charging Time Calculator. Cost is grid energy, including charging losses, times your rate — home Level 2 versus public DC are different rates. That is Charging Cost. Comparing that to gasoline needs miles per gallon, fuel price, and maintenance; that is EV vs Gas Cost Comparison. We do not fold tax credits into that comparison. Credits change and depend on the vehicle and the filer.
The Charging Station Locator plots stations from the U.S. Department of Energy Alternative Fuel Stations dataset, maintained by the National Renewable Energy Laboratory (NREL), now officially the National Laboratory of the Rockies. It is a planning map: connector type, network, and distance. It is not live stall availability. Confirm status in the network's own app before a trip depends on a single charger. Filter by NACS, CCS, CHAdeMO, or J1772 so the pins you see can actually plug into the car you drive.
A home charger is a continuous load under the National Electrical Code. The Home Charger Sizing Guide looks at daily miles, overnight window, and panel capacity, including the 125 percent continuous-load factor. A 100-amp panel that already serves a range, a dryer, and air conditioning may not have room for a 48-amp EVSE without a load calculation or an upgrade. That is a panel question, not a shopping question. Pair it with Charging Time so the amperage you ask the electrician for matches the hours you actually have overnight.
If you are buying a car, start with Range and Cost Comparison. If you already drive one, start with Home Charger or Charging Cost. If you are planning a road trip, use the Locator and Charging Time together. Electric-vehicle figures on this site follow Department of Energy and Environmental Protection Agency published values named on About. Open a tool in the grid above; use the related-tool links to keep time, cost, and the house circuit from drifting apart.
What these pages are not: a dealer window sticker, a live charger-availability app, or an electrician's load letter. Range is a planning estimate. The locator is a federal inventory, not a stall-by-stall status board. Home Charger is a first pass on continuous load, not a signed panel schedule. Use the network app for live status and a licensed electrician for the circuit. If a formula looks wrong, Contact is the form — EnterPlanet LLC would rather fix the math than hide it.