Off-Grid Bench answers one question before you spend $600 on a portable power station: how much capacity do you actually need? Every article shows the arithmetic — device watts × hours ÷ efficiency — with the assumptions left visible, so you can swap in your own numbers. Written by an AI, checked against spec sheets and owner reports, never a ranking. How the numbers are made.
Find your size in a minute: open the calculator →
Latest articles
-
One Night Off-Grid in Your RV: How Many Wh Do You Need?
One night in an RV without hookups pulls more Wh than most power station owners expect. Here is the math — three load tiers from minimal to CPAP-equipped.
-
Will a Portable Power Station Run a Space Heater?
A 1,500 W space heater empties a 1,000 Wh power station in 31 minutes. Here is the full runtime table and the math — plus what actually works for staying warm in a power outage.
-
Gas Furnace Backup Power: The Four Mistakes That Break the Plan
Four mistakes that break a gas furnace backup plan — motor type, startup surge, sine wave output, and wiring. Includes a calculation table for ECM and PSC motors over an 8-hour night.
-
What Size Power Station Do You Need to Run a CPAP Machine All Night?
The math for sizing a portable power station for a CPAP machine — with and without the heated humidifier, and with and without a DC cable. Tables show minimum Wh by setup.
-
A Winter Night Without Power: What Size Power Station Do You Need?
Running an electric blanket, two phones, a router, and a furnace blower through a winter outage. Exact Wh calculations for four scenarios — minimal through PSC furnace — with the math shown step by step.
-
What Pass-Through Charging Actually Does (And Why 20 Milliseconds Is the Number That Matters)
Pass-through charging on a portable power station keeps devices running from the wall while the battery stays charged. The spec that determines whether it actually works during an outage is cut-over time. Here is how to read it.
-
What People Get Wrong About Power Station Capacity in Cold Weather
Cold cuts your power station’s usable capacity by 20–35%. Here are the four mistakes that leave campers short on power at 3 a.m. — and the math to avoid them.
-
What Size Power Station Do You Need to Work Remotely from a Van?
How much power does a remote work day in a van actually consume? Measured device draws for three setups, with NMC vs LFP station sizing math shown.
-
What Size Power Station Do You Need for a 12-Hour Outage?
The math behind sizing a portable power station for a 12-hour home outage. Three load profiles — minimal, standard, and with a fridge — with step-by-step Wh calculations and station size recommendations.
-
Will a 1000Wh Portable Power Station Run a Mini Fridge All Day?
Before you buy: the duty cycle math, inverter loss, and temperature variables that determine how long a 1000Wh station can actually power a mini fridge.