48 kW Whole House Generator Cost: Kohler 48RCLC Lists at $25,703.
A 48 kW home standby generator is liquid-cooled. Kohler publishes list prices for this class and puts the 48RCLC at a $25,703 MSRP, generator only (checked October 2026). Installation is quoted on top by the dealer.
Kohler Liquid-Cooled RCL Line, MSRP
| Model | kW | MSRP |
|---|---|---|
| Kohler 24RCLA | 24 | $17,900 |
| Kohler 30RCLA | 30 | $20,399 |
| Kohler 38RCLC | 38 | $22,949 |
| Kohler 48RCLC | 48 | $25,703 |
| Kohler 60RCLB | 60 | $28,304 |
Starting MSRP, installation not included, from Kohler's home generators listing, checked October 2026.
The Jump From 26 kW to 48 kW
Kohler's air-cooled RCA line stops at the 26RCA, listed at $7,546. Above that the choice is a liquid-cooled RCL model, starting with the 24RCLA at $17,900. A 48 kW unit is not a bigger version of a 26 kW unit: it has a radiator and coolant system and is built for longer, heavier running, and it is priced that way.
That gap is why the load calculation matters more here than at any other size. If a licensed electrician's calculation, with load management on the largest appliances, fits within 26 kW, the air-cooled route costs a fraction of the list price. Start with our sizing calculator, then get the electrician's figure.
What a 48 kW Quote Should List
The list prices exclude installation, which the dealer prices, and installs at this size vary with the service size, the gas supply and the site. Ask each dealer to list separately: the transfer switch and its amperage, the gas line and any meter upgrade the gas utility requires, the pad and how the unit will be set on it, the electrical feeders, the permit, and factory commissioning. Compare the lines, not just the totals.
Generac sells 48 kW liquid-cooled Protector models through distributors. The distributor prices we saw in October 2026 differed by thousands of dollars, so ask for the model number and compare like for like.
FAQ
How much does a 48 kW whole house generator cost?v
Kohler lists its 48 kW liquid-cooled 48RCLC at a $25,703 MSRP on its home generators page (checked October 2026). That is the generator only: the transfer switch, pad, fuel and electrical work, permit and commissioning are quoted by the installing dealer on top.
Why does a 48 kW generator cost so much more than a 26 kW one?v
At 48 kW you are buying a liquid-cooled generator, a different class of machine. On Kohler's own price list the air-cooled 26RCA is $7,546 and the liquid-cooled 48RCLC is $25,703, both MSRP, generator only, checked October 2026.
Which brands make a 48 kW home standby generator?v
Kohler lists the 48RCLC in its liquid-cooled RCL line, which runs from the 24RCLA to the 60RCLB. Generac sells 48 kW liquid-cooled Protector models through distributors. The distributor prices we saw in October 2026 differed by thousands of dollars, so we do not quote one.
Do I need 48 kW?v
Only if your load calculation says so. Kohler's air-cooled RCA line tops out at 26 kW, and the step to liquid cooling more than triples the list price, so size from a load calculation first. Our sizing calculator gives a starting figure; your electrician's load calculation decides.