Camping & Overlanding
Car camping, weekend trips and vehicle-based travel
UDPOWER · Compact
UDPOWER C400 Specs, Price & Buyer Notes
256 Wh of storage, 400 W of continuous AC output, listed at $189. That works out to $0.74 per watt-hour and 37.1 watt-hours per pound. Spec figures below are taken from UDPOWER’s own product page; WattPicks editors are deep-use experience reviewers, not a pretend third-party lab for every SKU.
256 Wh400 W AC6.9 lb
What this unit is for
We have not yet written a positioning profile for this brand.
Best suited to: General portable power.
Phones, lights, a laptop. Carryable in one hand.
Where to buy
A tracked retailer link appears here only when we have a resolved offer for this model. We do not send readers to a manufacturer store page we cannot attribute.
Safety: lithium power stations store a lot of energy. Follow UDPOWER’s charge, ventilation, and storage instructions. WattPicks does not certify electrical installs.
Specifications
3 of 19 fields are published by UDPOWER for this model. The rest are shown as “—” and are excluded from rankings rather than estimated.
| Rated Wh (nameplate) | 256 Wh |
|---|---|
| AC output (continuous) | 400 W |
| AC surge | — |
| Power lifting / boost | — |
| Battery chemistry | — |
| Rated cycles | — |
| Weight | 6.9 lb |
| AC recharge to full | — |
| Max solar input | — |
| AC outlets | — |
| USB-C ports | — |
| USB-A ports | — |
| 12V car port | — |
| UPS switchover | — |
| Max expandable capacity | — |
| Warranty | — |
| Noise level | — |
| Ingress protection | — |
| Operating temp (low) | — |
| List price | $189 |
Where these numbers come from. WattPicks does not test power stations — this is a spec profile, not a review. Every figure on this page is taken from UDPOWER’s own product listing and is stored with the vendor’s exact wording, reproduced below. We do not estimate missing specs — a field the vendor does not publish is shown as “—” and excluded from rankings. Source: UDPOWER listing on Amazon.
Vendor wording for each figure (3)
capacityWh: “256 Wh”acOutputW: “400 watts”weight: “6.88 pounds”
UDPOWER C400 specs FAQ
What are the UDPOWER C400 specs?
256 Wh capacity; 400 W continuous AC; 6.9 lb; listed at $189. 3 of 19 fields are published by UDPOWER on the product page we read.
How long does the UDPOWER C400 last?
The vendor does not publish a cycle rating for this model on the page we read. Runtime is still capacity ÷ load; chemistry and duty cycle decide calendar life.
Can the UDPOWER C400 charge from solar?
No maximum solar input is published on the product page we read, so we cannot state a solar ceiling for this model.
Is the UDPOWER C400 good value?
At the published list price it works out to $0.74 per watt-hour. Compare that figure on our cost-per-watt-hour ranking rather than price alone.
Still sizing the purchase? How much capacity do I need · Solar charge time · Jackery vs EcoFlow vs BLUETTI
Where it ranks
Specs table →Position among all 137 power stations we track, in each dimension this unit publishes the inputs for.
| Dimension | Rank | Value |
|---|---|---|
| Best value (cost per watt-hour) | #85 of 128 | $0.74 |
| Most portable (Wh per pound) | #56 of 131 | 37.1 Wh/lb |
| Most inverter headroom | #58 of 137 | 156 W/100Wh |
| Most output per dollar | #70 of 137 | 2.12 W/$ |
Fits these buying scenarios
All use cases →Elsewhere in the UDPOWER range
All UDPOWER models →
Closest rivals by capacity
Other brands’ models nearest in capacity — the units a buyer is most likely to be comparing against this one.
