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186 products

  • Top Rated
    Cummins RS150

    Cummins RS150 - 150kW Quiet Connect Series 120/240V Three Phase Liquid Cooled Standby Generator - A063A486

    SKU: PES-PS-GEN-00100
    MPN NO

    A063A486

    Cummins
    $50,230.86 USD
    $50,230.86 USD
  • Top Rated
    Cummins RS150 Standby Generators 150kW - 480V | Portlandia Electric Supply

    Cummins RS150 150kW Standby Generator | 3-Phase 277/480V | Quiet Connect

    SKU: PES-PS-GEN-0099
    MPN NO

    A063A484

    Cummins
    $50,230.86 USD
    $50,230.86 USD
  • Top Rated
    Cummins RS150 - 150kW

    Cummins RS150 - 150kW Quiet Connect Series 120/208V Three Phase Liquid Cooled Standby Generator - A063A483

    SKU: PES-PS-GEN-0098
    MPN NO

    A063A483

    Cummins
    $50,230.86 USD
    $50,230.86 USD
  • Top Rated
    Cummins RS150 Standby Generators 150kW - 240V | Portlandia Electric Supply

    Cummins RS150 150kW Standby Generator | 1-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0097
    MPN NO

    A063B605

    Cummins
    $51,556.47 USD
    $51,556.47 USD
  • Top Rated
    Cummins RS125 Standby Generators 125kW - 240V | Portlandia Electric Supply

    Cummins RS125 125kW Standby Generator | 3-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0096
    MPN NO

    A063A453

    Cummins
    $44,990.78 USD
    $44,990.78 USD
  • Top Rated
    Cummins RS125 Standby Generators 125kW - 480V | Portlandia Electric Supply

    Cummins RS125 125kW Standby Generator | 3-Phase 277/480V | Quiet Connect

    SKU: PES-PS-GEN-0095
    MPN NO

    A063A449

    Cummins
    $44,990.78 USD
    $44,990.78 USD
  • Top Rated
    Cummins RS125

    Cummins RS125 125kW Standby Generator | 3-Phase 120/208V | Quiet Connect

    SKU: PES-PS-GEN-0094
    MPN NO

    A063A442

    Cummins
    $44,990.78 USD
    $44,990.78 USD
  • Top Rated
    Cummins RS125 Standby Generators 125kW - 240V | Portlandia Electric Supply

    Cummins RS125 125kW Standby Generator | 1-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0093
    MPN NO

    A063B604

    Cummins
    $46,308.07 USD
    $46,308.07 USD
  • Top Rated
    Cummins RS100 Standby Generators 100kW - 240V | Portlandia Electric Supply

    Cummins RS100 100kW Standby Generator | 3-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0092
    MPN NO

    A054F874

    Cummins
    $42,050.09 USD
    $42,050.09 USD
  • Top Rated
    Cummins RS100 - 100kW

    Cummins RS100 100kW Standby Generator | 3-Phase 277/480V | Quiet Connect

    SKU: PES-PS-GEN-0091
    MPN NO

    A054F873

    Cummins
    $35,779.21 USD
    $35,779.21 USD
  • Top Rated
    Cummins RS100 Standby Generators 100kW - 208V | Portlandia Electric Supply

    Cummins RS100 100kW Standby Generator | 3-Phase 120/208V | Quiet Connect

    SKU: PES-PS-GEN-0090
    MPN NO

    A054F870

    Cummins
    $42,050.09 USD
    $42,050.09 USD
  • Top Rated
    Cummins RS100 Standby Generators 100kW - 240V | Portlandia Electric Supply

    Cummins RS100 100kW Standby Generator | 1-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0089
    MPN NO

    A054F867

    Cummins
    $42,050.09 USD
    $42,050.09 USD
  • Top Rated
    Cummins RS80 Standby Generators 80kW - 240V | Portlandia Electric Supply

    Cummins RS80 80kW Standby Generator | 3-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0088
    MPN NO

    A054F857

    Cummins
    $36,252.81 USD
    $36,252.81 USD
  • Top Rated
    Cummins RS80 - 80kW

    Cummins RS80 80kW Standby Generator | 3-Phase 277/480V | Quiet Connect

    SKU: PES-PS-GEN-0087
    MPN NO

    A054F852

    Cummins
    $36,252.81 USD
    $36,252.81 USD
  • Top Rated
    Cummins RS80 Standby Generators 80kW - 208V | Portlandia Electric Supply

    Cummins RS80 80kW Standby Generator | 3-Phase 120/208V | Quiet Connect

    SKU: PES-PS-GEN-0086
    MPN NO

    A054F849

    Cummins
    $36,252.81 USD
    $36,252.81 USD
  • Top Rated
    Cummins RS80 - 80kW

    Cummins RS80 80kW Standby Generator | 1-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0085
    MPN NO

    A054F838

    Cummins
    $36,252.81 USD
    $36,252.81 USD
  • Top Rated
    Cummins RS60 Standby Generators 60kW - 240V | Portlandia Electric Supply

    Cummins RS60 60kW Standby Generator | 3-Phase 120/240V | Quiet Connect

    SKU: PES-PS-GEN-0084
    MPN NO

    A054F835

    Cummins
    $28,053.57 USD
    $28,053.57 USD
  • Top Rated
    Cummins RS60 Standby Generators 60kW - 480V | Portlandia Electric Supply

    Cummins RS60 60kW Standby Generator | 3-Phase 277/480V | Quiet Connect

    SKU: PES-PS-GEN-0083
    MPN NO

    A054F833

    Cummins
    $28,053.57 USD
    $28,053.57 USD

Generator Backup Power Solutions

Ensure your home or business never loses power with a generator backup system from PES Supply. From automatic standby generators that kick on within seconds of an outage to portable units for flexible power, we carry every type and size. Shop trusted brands including Generac, Kohler, Briggs & Stratton, Champion, Cummins, DuroMax, and more.

Generator Backup Options

  • Standby generators – permanent, automatic, whole-home (10kW-60kW)
  • Portable generators – movable power for any location
  • Inverter generators – quiet, clean power for electronics
  • Transfer switches – ATS for standby, manual for portable
  • Generator accessories – maintenance kits, covers, cords
  • Natural gas, propane, and gasoline fuel options

A standby generator with an automatic transfer switch provides hands-free backup—you may not even notice the power went out. For homes already on solar, a generator adds redundancy for extended cloudy periods. Our team helps you size the right generator for your critical loads and fuel availability.

Browse the full selection below and order today with fast shipping from PES Supply. Questions? Our solar and backup power experts are ready to help you spec the right system—contact us.