Tools
RV calculators
The original Megawatt calculators, rebuilt so you can see the answer move as you change the inputs. Each one shows its math.
11 calculatorsSaves to My rigFree, no sign-up
Flagship tool
Solar planner
Pick your rig, lay panels around the A/C and vents, add up your day, and pull real sun for your ZIP. You get three builds with battery, inverter, controller, and wire sizes, plus parts lists.
Plan my solarPower and solar
Size the battery, the panels, and the wire between them.
Battery bankDaily loads, days off-grid, and solar in. Voltage, amp-hours, and the Vatrer battery out.Original Megawatt mathSolar arrayWatt-hours and sun hours in. Minimum array and pack counts out.Original Megawatt mathSolar by location and seasonZIP and panel watts in. Twelve months of real watt-hours out.NewBattery runtimeBattery size, usable share, and load in. Hours and a discharge curve out.NewWire size and voltage dropAmps, volts, and run length in. Gauge, drop, and fuse out.Original Megawatt mathGenerator vs solar, one yearYour fuel, nights, and fees in. A one-year cost picture out.NewSolar paybackSolar cost and yearly running costs in. Breakeven year out.New
On the road
Weight, wind, fuel, and the license you need.
Fuel savingsRig, tanks, and speed in. Water weight and a labeled speed estimate out.Original Megawatt mathMax windLength, height, and weight in. Parked and 65 mph tipping bands out.Original Megawatt mathWeight and payloadSticker weights and cargo in. Remaining payload out.NewState license lookupPick a state. License notes for each rig class out.Original Megawatt math
Live data
Tools that call a weather service or a directory.