Learn before you buy
Formulas explained in plain language and basic electrical concepts — no claims we can't verify.
Best EcoFlow for your home: which one to choose for your needs
Not a list of models: it's the full decision, with links to each one's spec sheet.
EcoFlow or BLUETTI for your home
Compared by real capacity, at the three capacities where the catalog has an almost-identical pair.
How long each capacity lasts in a real power outage
Real hours with a refrigerator, fan and router — the same formula as the calculator.
What data your shipping agency needs
Capacity, chemistry, weight, dimensions and exact model — as data, never as a recommendation.
Catalog rankings
Stations ranked by a single real spec the manufacturer states.
How many hours does a battery of X Wh last with a device of Y watts?
- Education & formulas4 min
What Wh means and how to calculate how long your device will run
The difference between watts (W) and watt-hours (Wh), and the real formula to calculate how many hours a battery lasts with a device connected.
Key pointHours = (Capacity in Wh x efficiency) / Consumption in W. Real inverter efficiency runs 80%-90%, never 100%.
Read article - Basic electricity3 min
Why pure sine wave matters (and modified wave doesn't)
Cheap inverters deliver a square wave that can damage motors and compressors over time. What the difference is and how to spot it before buying.
Key pointA modified-wave inverter delivers a square electrical signal, not the smooth curve a motor or compressor expects — that generates extra heat and accelerated wear.
Read article - Refrigeration & power3 min
What peak (surge) power is and why your refrigerator needs it
Refrigerators, water pumps and air conditioners demand a startup surge several times higher than their normal consumption. If the station can't supply it, the device simply won't start.
Key pointA compressor's startup surge can be 3 to 6 times its rated consumption, even though it lasts only an instant. The station needs that peak power available, not just the continuous rating.
Read article - Systems & savings3 min
LiFePO4 vs other battery chemistries: what actually changes
Battery chemistry determines how many years a power station lasts with daily use, and how well it tolerates heat. What charge cycles actually mean.
Key pointA charge cycle is one full discharge (0% to 100% and back). LiFePO4 typically handles thousands of cycles before losing significant capacity; other lithium chemistries, considerably fewer.
Read article
Common questions about power
Why do a station's specs include BOTH continuous power AND peak power?
Continuous power is what the inverter sustains all the time. Peak power is what it can deliver in a brief burst, needed to start motors and compressors. See the peak power guide for details.
How long does a station take to charge with a solar panel?
It depends on the panel's power and the station's capacity: more panel watts and less Wh capacity means faster charging. Each spec sheet in the catalog states the maximum solar input that specific model accepts.
What's the difference between 'continuous output' and 'capacity' in Wh?
Capacity (Wh) is how much total energy the battery can store. Continuous output (W) is how much it can deliver at a given instant. A unit can have a lot of capacity but little output, or the other way around — both figures matter for different decisions.
Does this site's data come from Amazon, or are they our own estimates?
The technical specs (capacity, power, weight, battery chemistry) come from the manufacturer's spec sheet. The editorial scores (0 to 10 per axis) are this site's own assessment, always labeled as such — never presented as data from Amazon.