Kohler Generator Sizing: Match the Right Model to Your Home
Kohler offers residential standby generators from 10kW to 26kW, covering homes from small condos to large estates. Each Kohler model is available as a generator-only unit or bundled with a matched automatic transfer switch. Here is a straightforward sizing guide that maps Kohler models to home sizes.
10kW and 12kW: Small Homes and Essential Circuits
The Kohler 10kW RESV and 12kW RESV are designed for homes under 1,500 square feet or as essential-circuit backup for larger homes using a load-managed transfer switch. These units cover a gas furnace, refrigerator, lighting, outlets, and a sump pump. They pair with 100-amp transfer switches for selective circuit protection. Available with matched ATS as the 10kW RESVL and 12kW RESVL kits.
14kW: Mid-Size Homes
The Kohler 14kW RCA provides whole-house backup for homes up to approximately 2,000 square feet with a gas furnace and a central AC system up to 3 tons. It is Kohler most popular entry-level whole-house generator and pairs with a 200-amp transfer switch for complete panel coverage. Available as the 14kW RCAL with 200A ATS kit.
20kW: Standard Whole-House Coverage
The Kohler 20kW RCA is the equivalent of the Generac 22kW in the Kohler lineup and is the most popular Kohler model for homes between 2,000 and 2,500 square feet. It powers central AC up to 4 tons alongside all other household loads. PowerBoost technology handles compressor startup surges cleanly. Available as the 20kW RCAL with 200A ATS kit.
24kW and 26kW: Large Homes
The Kohler 24kW RCLA and 26kW RCA cover homes from 2,500 to 3,500+ square feet with multiple HVAC zones, all-electric configurations, or high electrical demand. The 26kW RCAL with 200A ATS is the maximum residential Kohler kit, providing the quietest whole-house coverage available for large properties.
Beyond 26kW: Kohler Commercial Models
For homes and properties that exceed 26kW of demand, IB Lighting carries Kohler commercial generators at 30kW, 38kW, 48kW, and 60kW. These liquid-cooled commercial units serve large estates, multi-building properties, and commercial facilities with three-phase power requirements.
Free Kohler Sizing Help
Not sure which Kohler model fits your home? Call IB Lighting at (800) 674-9019 with your home square footage, AC tonnage, and panel amperage. We will recommend the exact Kohler model and configuration for your needs. Browse all Kohler models in our online shop.