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Güde ISG 1200-1 inverter, 1200 W, 2.8 l tank review

A 12.9 kg inverter generator rated 1200 W with a 2.8 litre tank and a stated runtime of up to 6.5 hours, with low-oil protection and an ECO mode.

The bottom line The lightest generator here by a clear margin, with proper engine protections and a tool bag in the box. It publishes a runtime with no load, no noise figure and no emissions class — three of the nine lines are blank.

A 12.9 kg inverter generator for one person to carry.

The weight

12.9 kg, against 18.5, 21 kg and more elsewhere in this family. With a carrying handle and anti-vibration feet, that is the difference between a generator that goes to a campsite and one that stays in a car boot.

What it protects itself against

Low oil, overload, with an LED display showing operating status and an oil warning. Engine protections rather than electrical ones, which is what a small four-stroke actually needs.

The runtime figure to discount

Up to 6.5 hours from 2.8 litres. No load stated. At a quarter load a tank lasts several times longer than at full output, so the number describes an unspecified condition. Every generator in this family has the same gap.

The two silences

Noise, on a machine sold for camping — where noise is the reason people are asked to switch it off. And any emissions class, which on a petrol engine sold in Europe is basic regulatory information.

Where it may be run

Its manual, not this page. Exhaust makes this an outdoor machine and no wording here softens that.

Availability

German, French and Spanish Amazon stores quoted 241 € to 353 € when this page was compiled.

Italian 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.

British Amazon catalogue carries an entry for it, with nobody selling.

American Amazon store 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 lightest generator in this family at 12.9 kg, with a carrying handle and anti-vibration feet
  • Low-oil protection, overload protection and an LED status display with an oil warning
  • A tool bag is included, which the third bullet lists

Compromises

  • The 6.5 hour runtime is quoted with no load, which makes it uncomparable
  • No noise figure at all, on a generator sold partly for camping
  • Only one 230 V outlet

Specifications

Rated1200 W, from the title and second bullet, from a four-stroke OHV petrol engine at 1.3 kW
Maximum outputAbsent as a separate figure — only the rated output is published
WaveformInverter technology named as delivering stable clean energy for sensitive devices, first bullet; pure sine is not stated
Tank2.8 litres, from the title
Runtime at a stated loadUp to 6.5 hours, from the title; NO load is stated
Noise at a stated distanceNowhere in the listing
Weight12.9 kg, third bullet — the lightest generator here
Outlets1× 230 V, from the title
Emissions classNowhere in the listing
Amazon referenceB07DLCZSXG (same reference on 5 Amazon marketplaces)
EAN4015671696465

Questions owners ask about this one

What does a runtime without a load mean?

Very little. A tank lasts far longer at a quarter load than at full output, and the figure is only comparable when the load is stated. Six generators here, and not one publishes the load its runtime was measured at.

Is “inverter technology” the same as pure sine?

Inverter generators rebuild the waveform electronically, which is why they suit sensitive equipment. Four of the six generators here say “pure sine” explicitly; this one describes clean stable energy without the term. The maker’s datasheet is where the distinction is settled.