Power storage

Battery bank

Tick what runs in your rig, say how long you’ll be off hookups, and the bank sizes itself. Same load table and battery picks as the original Megawatt calculator.

Updates as you typeSame math as the original Megawatt tool

Your setup

Live
Setup class
What runs each day
Days without hookups
0 W
Sun hours for the solar offset

The original calculator always used 4 hours. Pick another if you camp somewhere darker or sunnier.

Storage you need

12V
0

Recommended bank

0Wh

Amp-hours

0Ah

Peak draw

0W

The battery that covers it

How the math works

Load over the trip is daily Wh × days. Solar offset is solar W × sun hours × 0.75 × days. The bank must hold the larger of load minus offset or 1.5 × daily Wh, and never less than 1,280 Wh. Peak draw over 3,000 W moves to 24V, over 5,000 W to 48V. The calculator then picks the smallest Vatrer battery at that voltage that covers the need, or parallels the biggest one.

These are the same load table, efficiency, floor, and battery links as the calculator on the current Megawatt site.

Keep planning

Solar plannerRoof layout, three build tiers, parts listsSolar arrayWatt-hours and sun hours in. Minimum array and pack counts out.Solar by location and seasonZIP and panel watts in. Twelve months of real watt-hours out.Battery runtimeBattery size, usable share, and load in. Hours and a discharge curve out.