| Gen-set model | IS-25 | IS-30 |
| Prime output (KW/KVA) | 20/25 | 24/30 |
| Standby output (KW/KVA) | 22/27.5 | 26/33 |
| Engine model | 4JB1 | 4JB1T |
| Rated output (KW) | 24 | 28 |
| Standby output (KW) | 27 | 32 |
| Engine speed (rpm) | 1500rpm |
| Engine characters | Water-cooling, in line, Vertical, 4 stroke, direction injection |
| Air induction system : | Natural Aspiration |
| Bore (mm) X Stroke (mm) | 93 X 102 | 93 X 102 |
| Cubic capacity (L) | 2.771 | 2.771 |
| Piston speed (m/s) | 6.12 | 6.12 |
| Compression ratio | 18.2 : 1 | 18.2 : 1 |
| Speed stability bandwidth | ≤±0.8% | ≤±0.8% |
| Steady governing rate | ≤5% | ≤5% |
| Exhaust temperature | 550 | 550 |
| Exhaust back pressure | 15KPa | 15KPa |
| Lube temperature/capacity | 120/5.5L | 120/5.5L |
| BMEP:Kpa (prime power) | 746 | 890 |
| Heat rejection to cooling | 27.1kw/min | 30.7kw/min |
| Cooling system volume | 4.5L (except water tank) | 4.5L (except water tank) |
| Cooling air flow | 118m 3 /min | 118m 3 /min |
| Combustion air flow | 2.56m 3 /min | 3.08m 3 /min |
| Exhaust gas flow | 7.97m 3 /min | 9.53m 3 /min |
| Rating fuel consumption (L/h) | 6.5 | 6.5 |
| Alternator model | STG-25 | STG-30 |
| Type | Stamford Model .Brushless Self excitation. With AVR |
| Prime output (KW/KVA) | 20/25 | 24/30 |
| Standby output (KW/KVA) | 22/27.5 | 26/33 |
| phase/connection | 3-phase,4-wire,Y type connection |
| Voltage adjustment | ≤±5% | ≤±5% |
| Insulation class | H | H |
| Diesel Generator Set | | |
| Standar parts: | with meter.indicator,Emergency stop switch.with battery and 12hours the fuel tank on the bottom |
| Additional Part: | Smartgen Digital Controllor |
| Open type Dimensions(mm) | 1800*770*1100 | 1800*870*1100 |
| New Weight(kg) | 900 | 1000 |
| Silent type Dimensions(mm) | 2000*900*1200 | 2100*1000*1200 |
| New Weight(kg) | 1000 | 1100 |
| 20FT/PCS | 18 | 18 |
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