A 20 kVA generator delivers approximately 16 kW of usable power — enough to run a medium retail store or small clinic with lighting, IT and selected HVAC. At 75% load it consumes roughly 3.8 litres of diesel per hour. In South Africa a 20 kVA silent diesel generator typically costs between R68 000 and R95 000 excluding VAT and installation.
Pricing verified August 2026
Compare full specifications for matching models in the catalogue: 20 kVA Three Phase Silent Diesel Generator, 20 kVA Single Phase Silent Diesel Generator, 18 kVA Single Phase Silent Diesel Generator, 22 kVA Single Phase Silent Diesel Generator, 16 kVA Single Phase Silent Diesel Generator, 25 kVA Single Phase Silent Diesel Generator, 25 kVA Three Phase Silent Diesel Generator and 14 kVA Single Phase Silent Diesel Generator.
Not sure this is the right size? Try our generator sizing calculator, residential estates power solutions and hospitality and lodges power solutions.
A 20 kVA set most often falls into these ranges: diesel generators, single phase generators and three phase generators.
What a 20 kVA generator will run
Running cost at 20 kVA
Available 20 kVA generators
Every 20 kVA unit currently in the range, compared side by side.
| Model | Engine | Prime | Standby | Phase | Fuel @75% | Noise | Weight | Price excl. VAT |
|---|---|---|---|---|---|---|---|---|
| AGP 20 Hyundai Silent | Hyundai DHY20KS | 20 kVA | 22 kVA | Single | 3.8 l/h | 68 dB | 400 kg | R74 900 |
| AGP 20 Perkins Silent | Perkins 404D-22G | 20 kVA | 22 kVA | Three | 3.7 l/h | 67 dB | 450 kg | R89 200 |
| AGP 20 FAW Silent | FAW 20G | 20 kVA | 22 kVA | Three | 3.9 l/h | 69 dB | 430 kg | R71 800 |
| AGP 20 Cummins Silent | Cummins X2.5 | 20 kVA | 22 kVA | Three | 3.75 l/h | 68 dB | 470 kg | R92 800 |
Is 20 kVA the right size?
Twenty kVA covers many branch sites. If the clinic has imaging equipment or the shop has a large cold room compressor, model starting current carefully or move to 30 kVA.
20 kVA generator FAQs
Silent 20 kVA diesel sets typically range from R68,000 to R95,000 excl. VAT depending on engine brand and phase.
About 3.8 L/h at 75% load — roughly R89 per hour at R23.50/L.
Approximately 16 kW: medium retail, a small clinic or a branch office with selective HVAC and IT.
Both. Single-phase remains common under ~22 kVA for retail; three-phase is preferred where the building board is already 400 V.
Structural pad, acoustic placement relative to neighbours, fuel, earthing, exhaust and compliant electrical integration with CoC.
A typical 90 L base tank at 75% load runs near 24 hours before refuel — confirm the exact tank on the model you specify.