How long will a Jackery Explorer 300 Plus run an aquarium heater? (US 120 V)
Yes, it runs it 2.1 h
Includes this load’s 100% duty cycle and the station’s 12 W idle draw — not a label-wattage guess.
Derived from official coefficients + Derived by WattPairverified 2026-08-09US 120 V unit × aquarium heater
Running100 Wof300 Wcontinuous output
0 – 300 W across the rails above
No start-up rail: this load has no locked rotor to publish an inrush for, so no start-up demand was checked.
Two numbers decide this, and readers use them interchangeably: watts are the ceiling on what the inverter holds at any instant, watt-hours are how much energy the battery holds. A machine can have plenty of one and not enough of the other.
The verdict is a calculation, not a lookup; the hours are a division, not the nameplate watt-hours. The working is in the evidence below.
This page answers an electrical question, not a fishkeeping one.
Where this page puts hours on a pairing, that number is how long a power station’s battery lasts running this heater’s wattage — an electricity number, not a judgment about whether the animals in the tank are safe. Hours here means hours of power, nothing more.
Where a verdict below reads a tight fit — the amber triangle — read it as don’t rely on this pairing, not as a compromise that will probably hold. It means the load doesn’t clear that station’s numbers with confidence — it isn’t a passing grade with an asterisk.
What to do when the power goes out is a fishkeeping question, and it’s outside what this site answers — a tank’s own care sheet, a local fish store, or an aquarium-keeping community can say what a given species and setup actually need. If keeping the heater running through an outage matters enough to plan for, the usual paths are a generator sized for the load or a written outage plan; this page can help with the electricity math for either one.
Where those numbers come from
A blank is never left blank. A field we have found no figure for says so, and a field whose sources disagree — two documents, or one document with itself — says that instead of picking one.
What an aquarium heater demands
What the Jackery Explorer 300 Plus offers
The arithmetic: 288 Wh nameplate × 80% published capacity coefficient = 230.4 Wh
Jackery publishes the coefficients but not this figure, so it is computed rather than copied.
What the machine consumes just being switched on. It sits in the runtime denominator alongside the load.
Where to buy
Out of stock at the official store · checked 2026-08-16
Out of stock at the official store when we checked on 2026-08-16. We are not sending you to a sold-out page with a buy button on it — the link below goes to the product page, where you can set a restock alert.
Where to buy the Jackery Explorer 300 Plus
Prices checked 2026-08-17
If this is not the pairing
BLUETTI Elite 30 V2 (US 120 V) reaches the same conclusion on an aquarium heater at 600 W continuous, and it is $239. Cheaper is only cheaper when the answer is the same — this one is. See that pairing →
The same load on the machines beside it
The same machine on the loads beside it
Where to go next
An aquarium heater has a dedicated guide: the same records this page computes from, worked through in prose with room for the reasoning a table can only summarise — Why do some appliances change wattage between the US and Europe, and some don’t?