Single-phase 120/240V is the standard for residential and small light-commercial standby power. Air-cooled units typically run 8-26 kW; liquid-cooled residential units extend up to ~60 kW. Sizing is driven by the largest motor start (compressor, pump) plus continuous load.
17 models in this category.
Need help selecting a single-phase backup generators?
Our application engineers help size, spec, and source backup power for commercial, industrial, and mission-critical sites.
Cummins RS20: 20 kW residential standby generator running on natural gas or LP. Air-cooled Cummins engine with automatic transfer switch for whole-home backup.
Single-phaseresidential-standby
Echo
Echo DGK14F
Patented SimulPhase — simultaneous single and three-phase output from one unit, eliminating step-down transformers on mixed-load sites.
14.7 kW standby · Diesel · Liquid-cooled
Mixed-load construction sites where SimulPhase eliminates transformer cost, and rental fleets discovering Shindaiwa heritage.
14 kVA portable diesel generator with SimulPhase technology. Built in Japan by Shindaiwa/Yamabiko.
Tier 4 FinalSingle-phaseconstructionrental-fleet
Echo
Echo DGK20FS
Patented SimulPhase — simultaneous single and three-phase output from one unit, eliminating step-down transformers on mixed-load sites.
22 kW standby · Diesel · Liquid-cooled
Mixed-load construction sites where SimulPhase eliminates transformer cost, and rental fleets discovering Shindaiwa heritage.
20 kW single-phase portable diesel generator with SimulPhase technology.
Tier 4 FinalSingle-phaseconstructionrental-fleet
Echo
Echo DGK36FS
Patented SimulPhase — simultaneous single and three-phase output from one unit, eliminating step-down transformers on mixed-load sites.
40 kW standby · Diesel · Liquid-cooled
Mixed-load construction sites where SimulPhase eliminates transformer cost, and rental fleets discovering Shindaiwa heritage.
36 kW single-phase portable diesel generator with SimulPhase technology.
Tier 4 FinalSingle-phaseconstructionrental-fleet
Echo
Echo DGK7F
Patented SimulPhase — simultaneous single and three-phase output from one unit, eliminating step-down transformers on mixed-load sites.
7.2 kW standby · Diesel · Liquid-cooled
Mixed-load construction sites where SimulPhase eliminates transformer cost, and rental fleets discovering Shindaiwa heritage.
7 kVA portable diesel generator with SimulPhase technology. Built in Japan by Shindaiwa/Yamabiko.
Tier 4 FinalSingle-phaseconstructionrental-fleet
Hipower Systems
Hipower HYSG-30
Yanmar-powered small commercial standby from a vertically integrated US manufacturer — Big 4 specs at Tier 2 pricing.
30 kW standby · Diesel · Liquid-cooled
Small commercial standby where Yanmar reliability and US manufacturing matter.
30 kW Yanmar diesel standby generator. SafeGuard series for small commercial standby. Single-phase. US manufactured in Olathe, Kansas.
Tier 4 InterimSingle-phasecommercial-standby
Kohler
Kohler 25CCL
25 kW gaseous standby with PowerBoost -- 300% short-circuit for 10 sec. Kohler KG2204T turbo, no fuel storage required.
25 kW residential/light commercial standby on NG or propane. Sized for whole-house backup and small retail with motor-starting loads.
25 kW gaseous-fueled standby generator with Brushless Wound-Field alternator and PowerBoost excitation. Sized for residential and light commercial backup on natural gas or propane.
Single-phaseresidentialcommercial-small
Kohler
Kohler 30CCL
30 kW gaseous standby with PowerBoost -- 300% short-circuit for 10 sec. Kohler KG2204T turbo, no fuel storage required.
30 kW residential/light commercial standby on NG or propane. Sized for whole-house backup and small retail with motor-starting loads.
30 kW gaseous-fueled standby generator with Brushless Wound-Field alternator and PowerBoost excitation. Mid-range CCL series unit for residential and light commercial backup.
Single-phaseresidentialcommercial-small
Kohler
Kohler 36CCL
36 kW gaseous standby with PowerBoost -- 300% short-circuit for 10 sec. Kohler KG2204T turbo, no fuel storage required.
36 kW residential/light commercial standby on NG or propane. Sized for whole-house backup and small retail with motor-starting loads.
30-36 kW gaseous-fueled standby generator with Brushless Wound-Field alternator and PowerBoost excitation. Largest CCL series unit for residential and light commercial backup.
Single-phaseresidentialcommercial-small
Winco
Winco DE20I4
100% US-made diesel standby with Stamford alternator and non-proprietary engines — serviceable by anyone, not locked to a dealer network.
20 kW standby · Diesel · Liquid-cooled
Cost-conscious commercial/institutional standby where Buy American and component independence matter.
20 kW standby diesel generator with Isuzu 4LE1 engine. DE series open-frame. 100% US-made in Le Center, Minnesota.
Tier 4 InterimSingle-phasecommercial-standby
Winco
Winco DR12I4
100% US-made diesel standby with Stamford alternator and non-proprietary engines — serviceable by anyone, not locked to a dealer network.
12.5 kW standby · Diesel · Liquid-cooled
Cost-conscious commercial/institutional standby where Buy American and component independence matter.
12.5 kW standby diesel generator with Isuzu 3CE1 naturally aspirated engine. Smallest DR series. US-made.
Tier 4 FinalSingle-phasecommercial-standby
Winco
Winco DR20I4
100% US-made diesel standby with Stamford alternator and non-proprietary engines — serviceable by anyone, not locked to a dealer network.
20 kW standby · Diesel · Liquid-cooled
Cost-conscious commercial/institutional standby where Buy American and component independence matter.
20 kW standby diesel generator with Isuzu 4LE1 2.2L engine and Stamford alternator. DR series enclosed. US-made.
Tier 4 InterimSingle-phasecommercial-standby
Winco
Winco HPS12000HE
Honda GX630-powered tri-fuel portable — runs on gasoline, LP, or natural gas with no proprietary engine lock-in.
12 kW standby · Gasoline · Air-cooled
Contractors, spray foam/roofing crews, and rural backup where engine quality and fuel flexibility matter.
12,000W surge / 10,800W running tri-fuel portable with Honda GX630 engine. Gas, LP, or NG. US-made.
