Head to head
Atlas Copco QAS 45 vs Stephill SSD6000S
The Atlas Copco QAS 45 is a silenced diesel generator, 43,5 kva prime power. The Stephill SSD6000S is a 6 kva super silent diesel generator on a two-wheel site trolley.
Last reviewed 6 October 2026
Specifications side by side
| Atlas Copco QAS 45 | Stephill SSD6000S | |
|---|---|---|
| Fuel tank | 92 / 257 (l) | 24.0 Litres |
| Noise level | 62 (LpA at 7m, dB(A)) | 60dBA @ 7 metres |
| Weight | 985 / 1065 (dry / wet, kg) | 210 KG |
| Prime power PRP | 43,5 / 35 (kVA / kW) | - |
| Emergency standby power ESP | 47,6 / 38 (kVA / kW) | - |
| Output | - | 6.0kVA / 4.8kW |
| Engine | - | Yanmar L100V (EU Stage V) |
Sources: Atlas Copco QAS 45, Stephill SSD6000S. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the QAS 45 if...
A mid-size 50Hz site generator for temporary power on larger sites and events, from the Atlas Copco QAS range that the maker designs for rental use. The brochure lists two fuel tank capacities for longer runs between refuels.
Full QAS 45 specifications →Buy or hire the SSD6000S if...
Light, quiet site generator for small crews, tool power and welfare use. The trolley makes it easy to move around site. The figures below are from the maker's own page.
Full SSD6000S specifications →Common questions
What is the difference between the Atlas Copco QAS 45 and the Stephill SSD6000S?
The Atlas Copco QAS 45 is a silenced diesel generator, 43,5 kVA prime power; the Stephill SSD6000S is a 6 kVA super silent diesel generator on a two-wheel site trolley.
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