The cable between battery and converter is part of the rating · review

Green Cell 500 W pure sine, 12 V to 230 V, 1000 W peak review

A 500 W pure sine converter with a 1000 W short-term peak and a USB port — a true sine unit sold under the general converter term rather than in the sine wave family.

By Jean-Benoit Buisson

The bottom line A pure sine output sold at modified sine prices, in a family where it is the exception. Its sheet is almost entirely empty — six blank lines out of eight — and its certifications are claimed without one being named.

A 500 W converter that is not like its neighbours.

The waveform, and the shelf

The title says pure sine. Six of the seven converters in this family are modified sine. That is not a mistake in the catalogue: these products are sold under the German term Spannungswandler, which covers both, and the shelf follows the term rather than the technology. This page names what the product is and leaves the shelf alone.

What that buys

A smooth output for motors and transformers, at a price that sits among modified sine units. That is the whole argument, and it is a real one.

What the listing does not contain

Input current. Cable size. Fusing. Mounting. Idle consumption. Efficiency. An identified certification. Six of eight lines above say the same thing.

The title to read carefully

500 W and 1000 W in the same phrase. The first bullet makes the relationship clear — 500 W continuous, up to 1000 W briefly — but the pairing in the title is the commonest way a peak gets read as a rating.

Availability

German, French and Italian Amazon stores quoted 37 € to 58 € when this page was compiled.

American and British Amazon stores carry it too, priced in their own currency, which the euro range above deliberately omits.

Spanish Amazon store wanted more than 1.6× what the cheapest country wanted. A margin that wide usually means stock shipped in from elsewhere rather than a seller on the ground, so that quote stays out of the range above.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.

Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.

What it gets right, and what it leaves out

Strengths

A pure sine output at a price that competes with modified sine units
A USB port alongside the mains socket
The peak is described as short-term rather than presented as a second rating

Compromises

Certifications are claimed and not one is named
Six of the eight specification lines are absent from the listing
The title pairs 500 W and 1000 W, which invites the peak to be read as continuous

Specifications

Output power	500 W continuous with a short-term peak up to 1000 W, first bullet
Waveform	Pure sine, from the title — the only converter in this family with a true sine output
Input current	Nowhere in the listing
Recommended cable	Absent as a size; the first bullet refers to the rated connection without a figure
Fusing	Nowhere in the listing
Mounting	Nowhere in the listing
Remote control	None
Protections	Described as a range of safety features and certifications, fourth bullet; none is named
Amazon reference	DE B071P1XH16 · US B086P8Y6LS · GB B086P8Y6LS · FR B086P8Y6LS · IT B086P8Y6LS · ES B086P8Y6LS
EAN	5902719422225

Questions owners ask about this one

Why is a pure sine unit in the converter family?

Because the families here follow the terms products are actually sold under, not a taxonomy. This one is listed as a Spannungswandler and produces a true sine wave. Six of its seven shelf-mates are modified sine. The family boundary is a market boundary, and this review says so rather than reclassifying the product.

Does pure sine matter at 500 W?

For motors and transformers, yes — they run cooler and quieter on a smooth waveform. For heating elements and simple electronics it changes very little. The device’s own manual is where any requirement for a sine supply is stated.