Power Station Says Overload — What Now?

First, get it running again

1. Unplug everything from the AC outlets. Not just the thing you think did it.
2. Switch the AC output off at the button. On some units the error holds until you do this.
3. Wait thirty seconds. The inverter needs a moment to reset.
4. Switch AC back on. The error should clear.
5. Reconnect one appliance at a time, largest first, watching the wattage display after each.

If the error returns with nothing plugged in, skip to the fault section at the bottom.

Now work out which limit you hit

This is the part that decides whether you have a habit to change or a unit that is wrong for the job.

Did it trip the instant something switched on? That is a surge trip. A motor or compressor spiked past the surge ceiling for a fraction of a second.

Did it run fine for a while and then quit? That is a continuous overload. Your total draw sat above the inverter's sustained rating.

The distinction matters because a surge trip can happen at 200W of actual load, and a continuous overload cannot.

Surge trips: what actually spikes

Anything with a motor or a compressor draws far more starting than running.

verify on each figure above.

Note the last row. Heating elements have no startup spike at all — they just demand their full draw from the first instant. That is why a heater that is under your rating always works, and a fridge that is far under it sometimes does not.

Fixes for surge trips:

• Start things one at a time. Let the fridge finish its startup before plugging in anything else.
• A soft starter, if the culprit is an air conditioner. It smooths the spike and is standard practice on RV rooftop units.
• More surge headroom. Aim for at least 20 percent above your largest spike. This one means a different unit.

Fridge tripping it specifically is common enough that we wrote it up on its own.

Continuous overloads: do the arithmetic

Add up the running watts of everything connected. If that total is above your inverter's continuous rating, it will trip — the only question is how long it takes.

A worked example on an 1,800W unit:

That is inside the rating with 30W to spare — until the fridge compressor kicks on and briefly asks for 900. Then you are at roughly 2,500W and it trips.

This is why "it worked for an hour then failed" is such a common story. The load did not change. The compressor cycled.

Fixes:

• Unplug the largest thing, which is nearly always a heating appliance
• Run high-draw items one at a time rather than together
• Leave real headroom — target 70 to 80 percent of the rating, not 98

The things that are simply too big

Some appliances are not a sizing problem. They are out of reach for portable units, and no setting changes that.

• Electric water heaters
• Electric ranges and ovens
• Central air conditioning
• Electric clothes dryers
• Well pumps above roughly 1/2 HP, on most units

If your overload is one of these, the honest answer is that this class of product does not do it. We list the full set in 9 things a solar generator will not run.

When it is a genuine fault

Everything so far assumes the protection circuit is right. Occasionally it is not.

Treat it as a fault when:

• The error appears with nothing plugged in
• It trips on a load you have measured well under the rating
• It trips instantly every time regardless of what is connected
• The case is hot while idle, or swollen, or smells acrid

That last one is not a troubleshooting step. Disconnect it, put it outside away from anything flammable, and contact the manufacturer without opening it.

If this keeps happening, you sized wrong

Worth being direct about, because it is the actual conclusion for a lot of people reading this.

An overload error once is a lesson. An overload error every time the fridge cycles is the unit telling you it cannot do the job you bought it for. There is no firmware update for that.

Before replacing it, get the number right — work out your real requirement, paying attention to the surge column rather than the watt-hours. Then look at what we recommend for outages, where every unit is listed with who it is wrong for as well as who it suits.

The short version

Unplug, reset, reconnect one at a time. That fixes the immediate problem almost every time.

Then decide honestly which limit you hit. Continuous overload is a habit you can change. Repeated surge trips on a normal household appliance are a purchase you need to redo — and knowing which one you have is worth the two minutes it takes.