How These Numbers Are Computed
One formula, five manufacturers' own listings, no estimates of ours.
The formula
dollars per watt-hour = list price ÷ battery capacity
(Wh)
Worked example
The Jackery Explorer 1500 Ultra lists at $1,199.00 with a 1,536 Wh battery.
$1,199.00 ÷ 1,536 =
$0.78 per watt-hour
Where the numbers come from
- Specifications: each manufacturer's own public product listing (EcoFlow, Bluetti, Jackery, Anker SOLIX, Goal Zero). Every model page shows its source link, the capture date, and the verbatim sentence the capacity figure was read from.
- List price (MSRP): the list price shown on the manufacturer's own store at capture — the crossed-out "compare at" price where the store shows one, otherwise the store price itself. Each page says which of the two it used.
- Refusal over guessing: a station appears here only if its capacity and price are stated unambiguously by its own maker. Listings that state only an "expandable to" capacity, or contradict themselves, are left out rather than guessed at. Secondary specs (output watts, chemistry, weight, ports) show "not stated" when the listing doesn't state them.
Honest limitations
- List price is not street price. Power stations are discounted aggressively and often. $/Wh at list is a fair like-for-like ranking (every brand's list, same treatment), but the deal of the week can reorder any two neighbors. Live price tracking is planned; it is not here yet, and no number on this site pretends otherwise.
- $/Wh is one lens. It measures battery bought per dollar — not inverter power, port selection, cycle life, weight, or warranty. Small stations always cost more per Wh; compare within a size class or use the head-to-head pages.
- Capacity figures are the manufacturers' rated Wh, measured by each maker's own method. Usable energy after inverter losses is lower for every station.
- Data refresh: monthly. Stations whose listings go away or turn ambiguous drop out at the next refresh rather than lingering wrong.