Specifications
| Fuel | Natural Gas, Propane Vapor |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 45 kW |
| Standby kVA | 68 |
| Prime power | 45 kW |
| Emissions | EPA Emissions Compliance: Stationary Emergency |
| Controller | Digital H-Panel Controller |
| Oil capacity | 5.7 L |
| Alternator | 390 (Class NEMA MG1-32.6, NEMA MG1-1.66 insulation) |
| Voltage options | 120 V, 208/240 V, 480 V |
| Phase | Three-Phase |
| Rated current | 188 A |
| Power factor | 0.8 |
| Circuit breaker | 120 A |
| Battery group | 24/27/31 |
| Battery cranking | 525/700/925 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 11.36 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 1930×950×1176 mm |
| Dry weight | 714 kg |
| Tank runtime | N/A hr |
Engine
| Oil capacity | 5.7 L |
|---|---|
| Coolant capacity | 11.36 L |
| Displacement | 5.4 L |
| Aspiration | Naturally Aspirated |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Generac SG045| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Standard | — | |||
| Fuel filter | Standard | — | |||
| Battery | Standard | — | |||
| Belt | Standard | — | |||
| Coolant | Standard | 11.36 L | — | ||
| Oil | Full-flow spin-on cartridge | 5.7 L | — |
Service intervals
1| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Generator set | Inspect | 100 hr | 12 mo | First service — Level 4 mid-level inspection; annually or following each 100 hours of operation; approx. 5.0 man-hours; authorized Generac Service Dealer only; add 20% to all times for 8 cylinder or larger engines |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | Half low silicate, ethylene glycol base antifreeze and half soft water (50-50) | 17.0 L | Cooling System SG035/045/075 = 17 L (4.5 U.S. gals.); do not use chromate base rust inhibitor or high silicate antifreeze boosters | ||
| Engine oil | SAE 10W or 15W-40 | For Service CC, SD, SE or SF | below 0°C | 4.25 L | Below 32 F (0 C) |
| Engine oil | SAE 20W-20 or 15W-40 | For Service CC, SD, SE or SF | -1°C to 27°C | 4.25 L | 30 to 80 F (-1 to 27 C) |
| Engine oil | SAE 30W or 15W-40 | For Service CC, SD, SE or SF | above 27°C | 4.25 L | Above 80 F (27 C) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What size generator is the Generac SG045?
The Generac SG045 is rated 45 kW standby (68.0 kVA).
What engine does the Generac SG045 use?
The Generac SG045 is powered by the Generac SG045 engine.
What fuel type does the Generac SG045 take?
The Generac SG045 runs on Natural Gas, Propane Vapor.
How much oil does the Generac SG045 take?
The Generac SG045 engine in the Generac SG045 has an oil capacity of 5.7 liters.
How much coolant does the Generac SG045 hold?
The Generac SG045 cooling system holds 11.36 liters (3.0 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
How much does the Generac SG045 weigh?
The Generac SG045 has a dry weight of 714 kg (1574 lb).
What voltages is the Generac SG045 available in?
The Generac SG045 is offered in 120 V, 208/240 V, 480 V, Three-Phase-phase.
What size battery does the Generac SG045 need?
The Generac SG045 uses 1 battery, 12 V each, 525/700/925 CCA, group 24/27/31, per the manufacturer specification sheet.
What alternator comes on the Generac SG045?
The Generac SG045 uses a 390 alternator. Insulation class NEMA MG1-32.6, NEMA MG1-1.66.
Parts
47model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 035606 | SENSOR HI COOLANT SHUTDOWN | 1 | Sensor | Amazon eBay |
| 053666 | SENDER OIL PRESSURE | 1 | Sensor | eBay |
| 053667 | SENDER WATER TEMP | 1 | Sensor | eBay |
| 057448 | HOSE 5/8 ID TYPE 3 SINGLE (12") | 1 | Hose | eBay |
| 057522 | SENSOR COOLANT LEVEL | 1 | Sensor | Amazon eBay |
| 059056A | STARTER | 1 | Starter | eBay $234.00 |
| 059057 | HOSE 3/4 ID SAE-30R2 | 1 | Hose | Amazon eBay |
| 0758720149 | SEAL, CR/SHAFT RR OIL (1996) | 1 | Seal | eBay |
| 0758720177 | GASKET, WATER PUMP | 2 | Gasket | eBay |
| 0758720225 | GASKET, DISTR | 1 | Gasket | Amazon eBay |
| 075885 | THERMOSTAT 195 DEG | 1 | Thermostat | Amazon eBay |
| 0A1232 | D.C. ALTERNATOR ASSY | 1 | Alternator | Amazon eBay |
| 0A2440 | GASKET THERMOSTAT | 1 | Gasket | eBay |
| 0A37970001 | FILTER OIL | 1 | Oil filter | Amazon eBay $16.00 NAPA $9.09 |
| 0A37970120 | PUMP KIT, WATER | 1 | Pump | Amazon eBay |
| 0A37970122 | PUMP, OIL | 1 | Pump | eBay |
| 0A37970127 | SEAL, CR/SHAFT RR OIL (1997-98) | 1 | Seal | eBay |
| 0A37970137 | GASKET, OIL PAN | 1 | Gasket | Amazon eBay |
| 0A37970142 | SEAL, CR/SHF FRT OIL | 1 | Seal | eBay |
| 0A37970164 | GASKET KIT, INT MANIF (INCLS GASKETS & INST SH) | 1 | Gasket | eBay |
| 0A37970168 | GASKET, VLV RKR ARM CVR | 2 | Gasket | eBay |
| 0A37970172 | SPARK PLUG | 6 | Spark plug | Amazon eBay $38.54 |
| 0A37970177 | GASKET, CYL HD | 2 | Gasket | eBay |
| 0A37970180 | SEAL, INT VLV STEM OIL | 6 | Seal | eBay |
| 0A37970208 | SEAL, CR/SHAFT RR OIL (1999-2001) | 1 | Seal | eBay |
| 0A37970213 | GASKET, CR/SHF RR OIL SEAL HSG | 1 | Gasket | eBay |
| 0A37970217 | SEAL, OIL PAN DRN PLUG | 1 | Seal | Amazon eBay |
| 0A37970219 | GASKET, W/PMP CVR | 1 | Gasket | Amazon eBay |
| 0A37970228 | SEAL, EXH VLV STEM OIL | 6 | Seal | eBay |
| 0A37970237 | HOSE, W/PMP INL | 1 | Hose | eBay |
| 0A37970239 | GASKET KIT, CYL HEAD | 1 | Gasket | eBay |
| 0A4085 | GASKET EXHAUST MANIFOLD | 1 | Gasket | eBay |
| 0A4277 | WIRES SPARK PLUG 4.3L | 1 | Spark plug | eBay |
| 0A4278A | BELT SERPENTNE 72.5" | 1 | Belt | eBay |
| 0A4278B | SERPENTINE BELT 72-1/2 | 1 | Belt | eBay |
| 0A4637 | Air Cleaner | 1 | Air filter | Amazon eBay $49.95 NAPA $13.61 |
| 0A5264 | V-BELT 3/8 X 41 | 1 | Belt | eBay |
| 0A8584 | Switch | 1 | Sensor | Amazon eBay $19.57 FridayParts $31.60 |
| 0A37970191 | COIL, DISTR PICK UP (DISTRIBUTOR PICK UP COIL) | 1 | Service part / kit | eBay |
| 0A37970193 | Distributor Ignition Module (4.3 Liter Gas) | 1 | Service part / kit | eBay |
| 0A37970195 | Distributor Rotor (4.3 Liter Gas) | 1 | Service part / kit | eBay |
| 0A37970198 | COIL, IGN | 1 | Service part / kit | Amazon eBay |
| 0A37970201 | CAP, DISTR (DISTRIBUTOR CAP) | 1 | Service part / kit | eBay |
| 0A37970222 | GEAR KIT, BALR SHF (1997-2001) (INCLS DRIVE & DRIVEN GRS, ITEMS 89 & 95) | 1 | Service part / kit | eBay |
| 0A37970223 | CHAIN KIT, TMG (1999-2001) (INCLS CHAIN, CR/SHF SPROCKET, CM/SHF SPROCKET) | 1 | Service part / kit | eBay |
| 0A4215 | DIP STICK 4.3L GM | 1 | Service part / kit | eBay |
| 0A4244 | CONNECTOR COIL TO DISTRIBUTOR | 1 | Service part / kit | Amazon eBay |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 25% | 290.0 | 8.2 |
| Standby | 50% | 426.0 | 12.1 |
| Standby | 75% | 562.0 | 15.9 |
| Standby | 100% | 698.0 | 19.8 |
Available documents
This page was generated from the 5 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.