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.
31 models in this category.
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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 14RCA
Entry-level Kohler standby at 14 kW -- Kohler CH740 V-twin with Decision-Maker controller. Quieter than most air-cooled competitors.
14 kW standby · Natural Gas / LPG · Air-cooled
14 kW residential standby for small-to-medium homes on natural gas or propane. Covers standard HVAC, kitchen, and essential circuits.
14 kW residential air-cooled standby generator. Kohler's entry-level whole-house backup on natural gas or propane.
Single-phaseresidential-smallwhole-house-basic
Kohler
Kohler 20RCA
20 kW air-cooled standby -- Kohler CH1000 V-twin at 3600 RPM. Decision-Maker controller with mobile monitoring and self-test.
20 kW standby · Natural Gas / LPG · Air-cooled
20 kW whole-house residential standby on NG/LP for medium homes with central A/C, full kitchen, and home office loads.
20 kW residential air-cooled standby generator. Mid-range air-cooled backup for medium homes on natural gas or propane.
Single-phaseresidential-mediumwhole-house
Kohler
Kohler 24RCL
Liquid-cooled 24 kW standby -- quieter and heat-rated where air-cooled units derate. Kohler KG2204 at 1800 RPM.
24 kW standby · Natural Gas / LPG · Liquid-cooled
24 kW residential standby for medium-to-large homes requiring quiet operation and full-load performance in hot climates on NG/LP.
24 kW residential liquid-cooled standby generator. Kohler's whole-house backup for medium homes on natural gas or propane.
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 26RCA
Top-of-line air-cooled at 26 kW -- Kohler CH1006 V-twin. Largest capacity before stepping up to liquid-cooled RCL series.
26 kW standby · Natural Gas / LPG · Air-cooled
26 kW residential standby for larger homes on NG/LP where liquid-cooled cost is not justified but full-house coverage is required.
26 kW residential air-cooled standby generator. The largest air-cooled unit in Kohler's residential lineup for larger homes on a budget.
Single-phaseresidential-largewhole-house
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 30RCL
30 kW liquid-cooled residential -- Kohler KG2204T turbo at 1800 RPM. Quieter than 3600 RPM air-cooled with longer service life.
30 kW standby · Natural Gas / LPG · Liquid-cooled
30 kW whole-house standby for large homes and estates with dual-zone HVAC, pool equipment, or EV charging on NG/LP.
30 kW residential liquid-cooled standby generator. Premium whole-house backup for larger homes with multiple HVAC zones.
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
Kohler
Kohler 38RCL
38 kW liquid-cooled residential -- Kohler KG2204T turbo at 1800 RPM. Quieter than 3600 RPM air-cooled with longer service life.
38 kW standby · Natural Gas / LPG · Liquid-cooled
38 kW whole-house standby for large homes and estates with dual-zone HVAC, pool equipment, or EV charging on NG/LP.
38 kW residential liquid-cooled standby generator. Premium whole-house backup for large estates and homes with heavy electrical loads.
Compact portable at 6 kW prime. Residential backup, small tool power, and light commercial applications where 120/240V flexibility is needed in a small footprint.
7 kW standby (6 kW prime) portable diesel generator. Compact Kubota-powered WhisperWatt with 120/240V output at 65 dBA.
WhisperWatt 20 kW single-phase — Isuzu diesel at 1800 RPM, 65 dBA at 7m, 120/240V output, 41.7-gal tank. Same 20 kW as the DCA-25 but for single-phase-only loads.
22 kW standby · Diesel · Liquid-cooled
Full residential or light commercial at 20 kW prime. For sites that need the power of a DCA-25 but only require single-phase 120/240V output.
20 kW prime (22 kW standby) portable diesel generator. Isuzu-powered WhisperWatt single-phase at 65 dBA — same power as the DCA-25, single-phase only.
The largest single-phase WhisperWatt — 36 kW prime from an Isuzu 4LE2X, 65 dBA at 7m, 120/240V only, 79.2-gal tank. Same engine as the DCA-45 but optimized for single-phase loads.
40 kW standby · Diesel · Liquid-cooled
Large single-phase portable at 36 kW. For commercial and residential sites needing maximum single-phase power: large homes, small buildings, and construction sites with heavy single-phase tool loads.
36 kW prime (40 kW standby) portable diesel generator. The largest single-phase WhisperWatt — Isuzu 4LE2X powered at 65 dBA with 79.2-gal tank.
