Power storage

Battery runtime

How long will the coffee maker, the fridge, or the whole rig run before the battery taps out? Three numbers, one answer.

Updates as you typeNew on Megawatt RV

Battery and load

Live
Battery size as
1,280 Wh
80 %

Use the depth of discharge your battery maker publishes. This page doesn’t assign one to lithium or AGM.

100 W
Quick picks from the Megawatt load table

How long it lasts

0

Runtime

0hours

Days

0d

Usable

0Wh

State of charge as the load runsYour usable floor

Need more hours?

Doubling the bank doubles the runtime. These are the two most common steps up from a single 100Ah on the original Megawatt calculator.

Vatrer 12V 300Ah lithium battery

3,840 Wh

Price is shown on Amazon. It is not stored on this site.

Check price on Amazon

Vatrer 12V 460Ah lithium battery

5,888 Wh

Price is shown on Amazon. It is not stored on this site.

Check price on Amazon
How the math works

hours = battery Wh × usable share ÷ load W. Amp-hours convert as Ah × volts. A steady load is assumed. Real loads cycle, so a fridge that draws 80 W while running uses less over a day than 80 × 24.

Keep planning

Solar plannerRoof layout, three build tiers, parts listsBattery bankDaily loads, days off-grid, and solar in. Voltage, amp-hours, and the Vatrer battery out.Solar 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.