An automatic transfer switch is the part of a standby system that decides how fast the lights come back on. This collection runs from 50-amp, 10-circuit Champion units (100950) up through 200-amp service-entrance models that carry a whole house on one switch. For residential work, Champion's aXis line covers 100A, 150A, and 200A service entrance…
107 products
Trina Solar
Trina Solar Vertex N 600W N-Type TOPCon Commercial Module
$299.00
$0.50/W · 600WAvailable to orderLead time confirmed at checkoutTop Seller
ZNShine
ZNshine 400W ZXM7-SH108-400/M All Black Monocrystalline...
$144.99
$0.36/W · 400WIn stockShips in 1–2 business daysTop Seller
ZNShine
ZNShine Solar 405W 108-Cell Solar Panel
$147.61
$0.36/W · 405WAvailable to orderLead time confirmed at checkout
LONGi
LONGi Hi-MO X6 Scientist 600W N-Type TOPCon Bifacial Mo...
$161.29
$0.27/W · 600WAvailable to orderLead time confirmed at checkout
Jinko Solar
Jinko Tiger Neo N-Type 600W Bifacial TOPCon Solar Panel
$216.00
$0.36/W · 600WAvailable to orderLead time confirmed at checkout
Canadian Solar
Canadian Solar HiKu6 395W Mono Solar Panel - CS6R-395MS-HL
$163.99
$0.42/W · 395WAvailable to orderLead time confirmed at checkout
Hyundai Energy Solutions
Hyundai HiS-S410YH(BK) 410W Bifacial Commercial Solar P...
$167.76
$0.41/W · 410WAvailable to orderLead time confirmed at checkout
Talesun
Talesun TM7G54M-450 450W Bifacial Solar Panel
$185.63
$0.41/W · 450WAvailable to orderLead time confirmed at checkout
Aptos
Aptos Solar DNA-120-BF10-440W 440W Bifacial Solar Panel
$176.00
$0.40/W · 440WAvailable to orderLead time confirmed at checkout
JA Solar
JA Solar 545 W Solar Panel – JAM72D30‑545/MB, 144‑cell ...
$239.99
Available to orderLead time confirmed at checkout-
Vendor:Cummins
MPN: GAP-CUMMINS-CUMMINS100AMPRA
Regular price $830.21 USDRegular priceUnit price per$833.21 USDSale price $830.21 USDIn stockExpected ship Oct 20 – 21SaleIn Stock -
Vendor:Cummins
MPN: GAP-CUMMINS-CUMMINS100AMP20
Regular price $813.49 USDRegular priceUnit price per$816.49 USDSale price $813.49 USDIn stockExpected ship Oct 20 – 21SaleIn Stock -
Vendor:Cummins
MPN: PES-SPS-SOL-3483
−3%Pallet of 30-3%Regular price $3,637.27 USDRegular priceUnit price per$3,749.76 USDSale price $3,637.27 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1471
−3%-3%Regular price $2,839.29 USDRegular priceUnit price per$2,927.10 USDSale price $2,839.29 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1472
−3%-3%Regular price $3,787.72 USDRegular priceUnit price per$3,904.87 USDSale price $3,787.72 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1473
−3%-3%Regular price $2,839.29 USDRegular priceUnit price per$2,927.10 USDSale price $2,839.29 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1474
−3%-3%Regular price $3,787.72 USDRegular priceUnit price per$3,904.87 USDSale price $3,787.72 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1475
−3%-3%Regular price $3,637.27 USDRegular priceUnit price per$3,749.76 USDSale price $3,637.27 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1476
−3%-3%Regular price $4,591.75 USDRegular priceUnit price per$4,733.76 USDSale price $4,591.75 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1477
−3%-3%Regular price $3,637.27 USDRegular priceUnit price per$3,749.76 USDSale price $3,637.27 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1478
−3%-3%Regular price $4,591.75 USDRegular priceUnit price per$4,733.76 USDSale price $4,591.75 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-1479
−3%-3%Regular price $7,833.22 USDRegular priceUnit price per$8,075.49 USDSale price $7,833.22 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Growatt
MPN: TV03.0005202
−9%-9%Regular price $636.00 USDRegular priceUnit price per$699.00 USDSale price $636.00 USDAvailable to orderExpected ship Oct 26 – Nov 02SaleIn Stock -
Vendor:Tigo Energy
MPN: GAP-P2-TIGO200A240VAUTOMATI
−16%-16%Regular price $1,732.66 USDRegular priceUnit price per$2,055.99 USDSale price $1,732.66 USDAvailable to orderLead time confirmed at checkoutSaleIn Stock -
Vendor:Tigo Energy
MPN: GAP-P2-TIGO200A240VAUTOMATI
−10%-10%Regular price $1,944.13 USDRegular priceUnit price per$2,149.99 USDSale price $1,944.13 USDAvailable to orderLead time confirmed at checkoutSaleIn Stock -
Vendor:KohlerMPN: GAP-P2-KOHLER20KWGENERATORW
Regular price $5,997.00 USDRegular priceUnit price per$6,000.00 USDSale price $5,997.00 USD$300/kWAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERAC100AMPAUTOMAT
−1%Regular price $546.00 USDRegular priceUnit price per$549.00 USDSale price $546.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERAC200AMPAUTOMAT
−1%Regular price $739.00 USDRegular priceUnit price per$749.00 USDSale price $739.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACRXSW100A3CUL1
−1%Regular price $749.00 USDRegular priceUnit price per$759.00 USDSale price $749.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACPWRCELL100AMP
Regular price $756.00 USDRegular priceUnit price per$759.00 USDSale price $756.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACGNCRTSN100G3G
−1%Regular price $909.00 USDRegular priceUnit price per$919.00 USDSale price $909.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACGNCRTSN100J3G
−1%Regular price $909.00 USDRegular priceUnit price per$919.00 USDSale price $909.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERAC200AAUTOMATIC
−1%Regular price $1,349.00 USDRegular priceUnit price per$1,369.00 USDSale price $1,349.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACGNCRTSN200G3G
−1%Regular price $1,349.00 USDRegular priceUnit price per$1,369.00 USDSale price $1,349.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERAC200AAUTOMATIC
−1%Regular price $1,379.00 USDRegular priceUnit price per$1,399.00 USDSale price $1,379.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACGNCRTSN200K32
−2%Regular price $1,429.00 USDRegular priceUnit price per$1,459.00 USDSale price $1,429.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACRTSW100J31202
−2%Regular price $1,759.00 USDRegular priceUnit price per$1,789.00 USDSale price $1,759.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERAC400AMPAUTOMAT
Regular price $2,126.00 USDRegular priceUnit price per$2,129.00 USDSale price $2,126.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACRTSN400G3GUAR
−2%Regular price $2,289.00 USDRegular priceUnit price per$2,329.00 USDSale price $2,289.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACGNCRTSN400J31
−2%Regular price $2,309.00 USDRegular priceUnit price per$2,349.00 USDSale price $2,309.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Generac
MPN: GAP-P2-GENERACRTSW200G31202
−2%Regular price $2,329.00 USDRegular priceUnit price per$2,369.00 USDSale price $2,329.00 USDAvailable to orderExpected ship Nov 02 – 16SaleIn Stock -
Vendor:Kohler
MPN: GAP-KOHLER-KOHLER200AMPAUT
Regular price $1,126.00 USDRegular priceUnit price per$1,129.00 USDSale price $1,126.00 USDIn stockExpected ship Oct 20 – 21SaleIn Stock -
Vendor:Generac
MPN: GAP-GENERAC-GENERAC50AMP10C
Regular price $796.00 USDRegular priceUnit price per$799.00 USDSale price $796.00 USDIn stockExpected ship Oct 20 – 21SaleIn Stock -
Vendor:Generac
MPN: GAP-GENERAC-GENERAC100AMPAU
Regular price $826.00 USDRegular priceUnit price per$829.00 USDSale price $826.00 USDIn stockExpected ship Oct 20 – 21SaleIn Stock -
Vendor:Generac
MPN: USS-GENE-K10179
Regular price $2,024.92 USDRegular priceUnit price per -
Vendor:Tigo Energy
MPN: USS-TIGO-TIG50AAUT
Regular price $465.51 USDRegular priceUnit price per -
Vendor:Tigo Energy
MPN: USS-TIGO-TIG200AUT
Regular price $2,057.24 USDRegular priceUnit price per -
Vendor:Cummins
MPN: PES-PA-ELC-A067J405
−3%-3%Regular price $1,512.62 USDRegular priceUnit price per$1,559.40 USDSale price $1,512.62 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-A067J404
−3%-3%Regular price $1,597.04 USDRegular priceUnit price per$1,646.44 USDSale price $1,597.04 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Cummins
MPN: PES-PA-ELC-A076C684
Regular price $2.00 USDRegular priceUnit price per -
Vendor:Cummins
MPN: PES-PA-ELC-A066W927
−3%-3%Regular price $4,170.65 USDRegular priceUnit price per$4,299.64 USDSale price $4,170.65 USDAvailable to orderExpected ship Jan 18 – Mar 08SaleIn Stock -
Vendor:Champion
MPN: PES-SPS-SOL-3011
Pallet of 30Regular price $1,395.50 USDRegular priceUnit price per -
Vendor:Kohler
MPN: PES-PS-GEN-0350
Pallet of 5Regular price $4,225.00 USDRegular priceUnit price per -
Vendor:Tigo Energy
MPN: PES-PS-GEN-0245
Pallet of 5Regular price $2,194.00 USDRegular priceUnit price per -
Vendor:Champion
MPN: PES-PA-ELC-1592
Regular price $1,295.75 USDRegular priceUnit price per -
Vendor:Champion
MPN: PES-PA-ELC-1591
Regular price $1,295.75 USDRegular priceUnit price per -
Vendor:Champion
MPN: PES-PA-ELC-1590
Regular price $677.00 USDRegular priceUnit price per -
Vendor:Champion
MPN: PES-PA-ELC-1518
Regular price $546.00 USDRegular priceUnit price per
About Automatic Transfer Switches
An automatic transfer switch is the part of a standby system that decides how fast the lights come back on. This collection runs from 50-amp, 10-circuit Champion units (100950) up through 200-amp service-entrance models that carry a whole house on one switch.
For residential work, Champion's aXis line covers 100A, 150A, and 200A service entrance in NEMA 3R enclosures — outdoor-rated, so the switch can sit at the meter where it belongs. Cummins' RA Series 100-amp gives you 20 spaces of load management in the same NEMA 3R format. On the commercial side, the Cummins OTEC 125A handles 208V and 480V three-phase, open transition, for small commercial services.
We tell every customer the same thing: size the switch to the service, not the generator. A 22kW standby unit on a 200A service still needs a 200A service-rated ATS if you want whole-house coverage. Drop to a 50A or 100A sub-panel switch only when you've picked the critical circuits deliberately.
Service entrance, sub-panel, single and three-phase — the full range is in the catalog.