GENERAC RG04845ANAC 48kW Protector Standby Generator - Catalyst

No transfer switch is included with the RG04845ANAC. The generator ships as the genset alone, so an automatic transfer switch has to be ordered separately and sized to the load you are backing up. The unit is rated 120/240 volts at 200 amps, so the switch you pair with it needs to match that voltage and carry that service rating.

The RG04845ANAC can be set as close as 18 inches from the structure, which is what makes it workable on tight lot lines and narrow side yards. The install guide governs the conditions on that 18 inch offset. For the pad itself, plan around a cabinet measuring 83.4 inches long, 35 inches wide and 46 inches high.

Either one. The RG04845ANAC is a dual-fuel-capable standby set that runs on liquid propane or natural gas, so the same model covers a building on a gas main and a rural site on a propane tank. Fuel selection is made at installation, and the gas line has to be sized for a 4.5L liquid-cooled engine at full 48 kW load.

Yes. The RG04845ANAC puts out 48,000 watts at 120/240 volts with a current rating of 200 amps, which lines up with a standard 200 amp single-phase service. Note that rated and surge wattage are both 48,000, so there is no extra motor-starting headroom above the continuous rating; size for the largest motor start on the panel rather than counting on a surge cushion.

Single phase. The RG04845ANAC is rated 120/240 volts, which is the standard single-phase residential and light-commercial configuration. If the building is on 120/208 or 277/480 three phase, this is the wrong unit and you need the three-phase version of the Protector Series instead.

The RG04845ANAC carries three listings: UL Listed, CSA Certified, and ETL Listed. That covers the approvals an inspector or facilities spec typically asks for on a permanently installed standby set in the US and Canada. It is built in the United States.

Output is under 5% total harmonic distortion through Generac's True Power technology, which is the threshold sensitive electronics, drives and computer loads are normally specified to. Automatic voltage regulation is included, so output voltage is held steady as load steps on and off. For a property manager backing up an elevator, boiler controls or a server closet, that combination is the spec that matters.

Mobile Link comes standard on the Protector Series, so status is visible from a phone, tablet or PC without a site visit. On the unit itself, the Evolution controller is readable without opening the enclosure, and there is an hour meter for tracking service intervals. Quiet-Test self-test runs at reduced RPM for five or twelve minutes and can be set weekly, bi-weekly or monthly, so exercise cycles do not wake a neighborhood or burn much fuel.

Liquid cooled, with a Generac 4.5L engine. That is the difference between this and the smaller air-cooled home standby units: a liquid-cooled set is built to carry load for extended runs rather than short outages, which is what you want on a commercial building, a healthcare site, or a property where an outage runs for days.

The part number is RG04845ANAC, a Generac Protector Series 48 kW standby generator with catalyst, 2019 model year, 120/240 volt single phase, liquid propane or natural gas. Order by that full MPN; the catalyst version and the voltage configuration both change the suffix on Generac's RG-series numbering.

The enclosure and internal frame are aluminum with Generac's RhinoCoat powder-coated finish, which is the corrosion-resistant build rather than painted steel. Color is bisque, a neutral tone meant to disappear against landscaping. Aluminum is the reason these can sit outdoors on a coastal or high-humidity site without the rust problems a steel cabinet develops.

Three protections are built in: low oil shutdown, overload protection, and automatic voltage regulation. The engine start type is automatic with override, so the set starts itself on a utility failure and can still be commanded manually for testing or maintenance. For an unmanned site, the low oil shutdown is the one that saves the 4.5L engine when nobody is there to hear it.