GENERAC RD02025JDAE Protector Series 20 kW Diesel Standby Generator - 3 Phase 120/240 V, Standard Tank

Plan the pad around a unit that measures 81 inches long, 31 inches wide and 65 inches tall, weighing 1,465 lbs dry of fuel. That footprint and weight is why these go on a poured concrete pad rather than a composite mounting pad, and why you want equipment on site to set it, not four guys and a dolly.

It is a three phase unit at 120/240 V, with a current range of 167/84 A. If your building service is single phase 120/240, this is not the right model for you, and a three phase generator cannot be reconnected in the field to feed a single phase panel. Confirm the service on the drawing before ordering.

Diesel, and it ships with a standard base tank built into the unit. The base tank is listed to UL/CUL 142. Diesel means you own the fuel supply on site, so build a fuel service interval into the maintenance plan and plan for periodic polishing or turnover if the site rarely exercises under load.

The generator is UL/CUL 2200-listed and the base tank is listed to UL/CUL 142. The unit is also CSA Certified, ETL Listed and UL Listed. Those are the listings an AHJ or an institutional spec reviewer will ask for on a permanently installed standby set.

The enclosure and frame are aluminum, finished in aluminum, and it is sound attenuated. Aluminum is the reason these get specified for coastal and rooftop sites where a steel enclosure rusts through at the seams. The sound attenuation matters if the set sits near occupied units or a property line with a noise ordinance.

Mobile Link connectivity is standard on all Protector Series generators, so you can check generator status from a phone, tablet or PC from anywhere. For a property manager or MRO group running sets at several buildings, that is how you catch a failed weekly exercise without sending someone to look at the panel. The unit also carries a two line multilingual LCD Evolution controller (English, Spanish, French, Portuguese) with an external viewing window, so status and breaker position can be read without opening the enclosure.

It uses an isochronous electronic governor, which holds engine speed, and therefore output frequency, flat from no load to full load instead of drooping as load is applied. That is what you want behind UPS gear, elevators, medical equipment or VFDs that are picky about frequency stability.

Order Generac model RD02025JDAE. That designation is the 20 kW Protector Series diesel standby, three phase 120/240 V, with the standard base tank. Generac builds the Protector line in several kW ratings, tank sizes and voltage configurations, so the full model string is what separates this one from the extended tank and single phase versions.

A smart battery charger is included as part of the package. On a standby set that may sit for weeks, the charger is what keeps the cranking battery ready, and it is a common omission on lower tier units that leaves the crew chasing a no-start on the first outage.

Country of origin is the United States, and it is not flagged as containing chemicals that cause birth defects under California Prop 65. Government and institutional buyers working to domestic sourcing preferences usually need both of those on record before a PO clears.