Cummins Engine
ST66C5
66 kVA Standby
Technical Specifications
Key Features

Robust, practical and reliable diesel generator. Whether it’s for use as a standby or backup generator, or for prime running on a construction site, this is engineered to do the job. Designed by the technical team here at OMC specifically for demanding New Zealand conditions. Every feature is intentional: like the silent canopy made from fully galvanised sheet with heavy duty 120µm powder coating, or the bunded fuel tanks that come standard for safety and environmental protection. Fitted exclusively with Deep Sea Electronics controllers, for the ultimate in reliability. To maximise protection, we opted for marinized, triple-dipped LeRoy Somer Alternators to make these seriously robust.
The ST66C5 is suitable for a wide range of applications from small house backup or standby applications to construction sites, events, or farming. With a 4 Pole AVR Controlled alternator this provides mains quality power, ensuring your electronics are safe. This is also suitable to charge battery energy storage systems such as those connected to solar panel systems.
Cummins QSB3.9-G2 Diesel 1500rpm Engine 68dBA Noise Levels @ 7m 66kVA Three Phase 400/230V Power Output 230L Fuel Tank Deep Sea DSE6120 Controller LeRoy Somer LSA Marinized (Extra-Varnish) Alternator Auto Start/2 Wire Start Capable Stronta generators represent the culmination of more than 25 years of hands on experience in the generator industry here in NZ. Designed by OMC from the ground up, they embody the lessons learned from hundreds of installs across construction sites, farms, homes, and industrial operations. In short: they’re robust, reliable, and made to keep running when you need them most. We stake our reputation on this product, so you don’t have to.
Frequently Asked Questions
ST66C5 — common questions
What engine is in the Stronta ST66C5?
The ST66C5 is powered by a genuine Cummins QSB3.9-G35 engine.
What are the power ratings of the ST66C5?
The ST66C5 is rated at 66 kVA standby / 60 kVA prime at 0.8 power factor.
What voltage and phase does the ST66C5 supply?
The ST66C5 supplies 400V three-phase, 50 Hz, three phase.
How loud is the ST66C5?
The ST66C5 operates at 64 dBA at 7 metres, housed in a super-silent canopy.
What controller is fitted to the ST66C5?
The ST66C5 uses a DSE6120MKII controller.
What alternator does the ST66C5 use?
The ST66C5 is fitted with a Leroy Somer LSA 44.3 S2 alternator.
What warranty is included with the ST66C5?
The ST66C5 is covered by a 2 Years / 1000 Hours warranty.
What is the fuel tank capacity of the ST66C5?
The ST66C5 has an integrated 230 litre fuel tank.