Head to head
Atlas Copco QAS 45 vs Pramac GRW22Y/S5
The Atlas Copco QAS 45 is a silenced diesel generator, 43,5 kva prime power. The Pramac GRW22Y/S5 is a stage v rental generator set, 18.3 kva prime power.
Last reviewed 6 October 2026
Specifications side by side
| Atlas Copco QAS 45 | Pramac GRW22Y/S5 | |
|---|---|---|
| Prime power PRP | 43,5 / 35 (kVA / kW) | 18.3 kVA |
| Emergency standby power ESP | 47,6 / 38 (kVA / kW) | 19.3 kVA |
| Fuel tank | 92 / 257 (l) | - |
| Noise level | 62 (LpA at 7m, dB(A)) | - |
| Weight | 985 / 1065 (dry / wet, kg) | - |
| Voltage | - | 400/230 (V) |
| Engine | - | YANMAR |
| Emission stage | - | Stage V |
Sources: Atlas Copco QAS 45, Pramac GRW22Y/S5. 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 GRW22Y/S5 if...
Rental-series generator set for hire fleets, events, construction sites and city centre works needing temporary three-phase power.
Full GRW22Y/S5 specifications →Common questions
What is the difference between the Atlas Copco QAS 45 and the Pramac GRW22Y/S5?
The Atlas Copco QAS 45 is a silenced diesel generator, 43,5 kVA prime power; the Pramac GRW22Y/S5 is a stage V rental generator set, 18.3 kVA prime power.
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