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WATTSTUNDE WS140SF SunFolder+ 140 Wp with a Victron MPPT 75/15 review

A 140 Wp folding solar bag supplied as a complete set with a Victron SmartSolar MPPT 75/15 controller, battery cables and a 5 m Anderson lead.

The bottom line The only solar bag in this catalogue with a named, documented controller, a 5 m Anderson lead and battery cables in the box. It publishes nothing about the panel itself — no voltage, no weight, no folded size — which leaves the chain half-checkable.

A 140 Wp solar bag sold as a complete charging chain rather than as a panel.

A controller in the bag, not sold separately

The controller is a Victron SmartSolar MPPT 75/15, named by maker and model. That is the only third-party component named anywhere in this catalogue, and it means its datasheet — input voltage ceiling, output current, battery compatibility, Bluetooth — can be read independently of this listing.

What is in the set

The 140 Wp SunFolder+ bag, the Victron controller, battery cables, and a 5 m connection cable with an Anderson plug system. Longest supplied lead in this family, and the only one that reaches a battery without a further purchase.

The irony of the sheet

Everything is published about the controller and nothing about the panel. No voltages, no weight, no folded dimensions, no material, no ingress rating. The controller has a 75 V input ceiling; the panel’s open-circuit voltage is not stated, so the one calculation the named controller makes possible cannot actually be completed from this page.

The price

Several times the other bags here. What that buys is the controller, the cables and the naming — not, on the evidence of this listing, more documentation about the panel.

Availability

German Amazon store quoted about 384 € when this page was compiled.

French, Italian and Spanish Amazon catalogues carry an entry for it, with nobody selling.

American and British Amazon stores returned nothing at all, so the buy button there runs a search instead of landing on an empty page.

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

  • The controller is named by maker and model — a Victron SmartSolar MPPT 75/15 — so its own datasheet can be consulted
  • Anderson connectors on a 5 m lead, which is the longest supplied cable in this family
  • Battery cables are included, so the set reaches a battery without a second purchase

Compromises

  • Neither folded size nor weight is published, on a bag sold for vanlife
  • No panel voltages, despite the controller having a published input window of its own
  • The most expensive product in this family by a wide margin

Specifications

Peak wattage140 Wp, from the title and first bullet
Panel countNowhere in the listing — folding construction is named without a count
ConstructionNowhere in the listing — no material or surface is named
Output connectorsAnderson plug system on a 5 m connection cable, third bullet; battery cables are included
Any integrated controllerVictron SmartSolar MPPT 75/15 included, second bullet, suitable for 12 V and 24 V battery systems — the only named third-party controller in this catalogue
Folded sizeNowhere in the listing
WeightNowhere in the listing
Stated weather resistanceNowhere in the listing
Amazon referenceB07SS4K8JZ (same reference on 4 Amazon marketplaces)
EAN4251190106010

Questions owners ask about this one

Why does naming the controller matter?

Because a named model has a published datasheet. A SmartSolar MPPT 75/15 states its maximum input voltage, its current limit and its battery compatibility — so the whole chain from panel to battery can be checked, which an unnamed controller makes impossible.

Is 75/15 enough for a 140 Wp panel?

The controller’s own datasheet is where that is settled — 75 is its maximum input voltage and 15 its output current in amps. The panel’s voltages are not published here, which is the missing half of the calculation and the one to ask the maker for.