Canopy Diesel Generators vs. Open Units

A Canopy Diesel Generator is a generator that is enclosed in a protective structure. Diesel generators without a protective structure are referred to as Open Units. Open Units are typically cheaper, however, Canopy Diesel Generators require less maintenance because they have additional protection against the elements.  Canopy Diesel Generators are also more secure, safe and sound-proof than Open Units.

Rather than purchase a Canopy Diesel Generator, some choose to purchase Open Units and buy or build housing for their generator in an attempt to save money.  Though home-built Canopy Diesel Generators are more protected from the elements than an Open Unit, the resources used to make them sound-proof and secure typically outweigh any savings.  However, if a location for an Open Unit that protects it from the elements is available and if noise levels do not matter, an Open Unit may be a better investment.

To help you narrow down your search, we’ve put together a list of some of our favorite Canopy Diesel and Open Unit Generators!

Best Canopy Diesel Generators

HJW 180 T5 Himoinsa CanopyThe HJW-180 T5 HIMOINSA Canopy Diesel Generator

Equipped with John Deere’s durable powerhouse 6068HF258 diesel engine and coupled to a Stamford alternator, this generator delivers a powerful 182kVA prime. With a super quiet enclosure reducing sound to 69dB(A) at 7 meters, this genset is ready for residential, commercial, or work site use. Considering it’s backed by a full manufacturer’s warranty, you can’t wrong with this one.

Himoinsa HSW 255 T5 LUX CanopyThe HSW-255 T5 LUX HIMOINSA Canopy Diesel Generator

This genset utilizes a powerful and reliable Scania DC9-72A diesel engine coupled to a Stamford alternator. For a 250kVA prime generator, you might expect the genset would produce tremendous noise pollution, but Yanmar-Himoinsas’ engineering prowess wins out. With the engine alternator mounted to the base frame via anti vibration mounts and a super quiet enclosure, this robust genset has a sound level of only 70dB (A) at 7 meters!

Himoinsa HSW 280 T5 Canopy Diesel GeneratorThe HSW-305 T5 HIMOINSA Canopy Diesel Generator

Himoinsa knows how to build a fantastic generator, and this model is no exception. Himoinsa chose an economical Scania DC9-72A diesel engine coupled to a Stamford alternator as the heart of this 300kVA prime genset .  This Canopy Diesel Generator is suitable for nearly any application, from agricultural and mining installations to power back-up for telecommunication systems. It’s 450 litre tank provides 10 hours of run efficient, quiet run time at 70dB(A).

Himoinsa HFW 600 T5 Canopy Diesel GeneratorThe HFW-600 T5 Himoinsa Canopy Diesel Generator

Pumping 599kVA prime and weighing in at 5305 kg, this workhorse relies on a durable Iveco CR16 TE1W diesel engine coupled to a Mecc Alte alternator. With its canopy enclosure, this monster still only produces a sound level of 79dB(A) at 7 meters! This model is ideal for heavy industrial work, mining and construction, or telecommunications and IT applications.

Yanmar Himoinsa HFW 500 T5 Canopy Diesel GeneratorThe HFW-500 T5 Himoinsa Canopy Diesel Generator

This genset rates an impressive 500kVA prime with an 8 hour run time on a 597 litre fuel tank. Even more impressive is that due to its quiet canopy enclosure, it only emits 68dB(A) at 7 meters! This genset features the durable Iveco C13TE7 diesel engine coupled to a Mecc Alte alternator as its powerhouse, and is of course backed by a full manufacturer’s warranty.

Best Open Unit Generators

Himoinsa HFW 500 T5 Canopy Diesel GeneratorThe YANMAR – HIMOINSA HYW-30 M5 Open Diesel Generator

Given that this beautiful Open style genset is powered with Yanmar’s stalwart 4TNV98 diesel engine, you know this is a quality diesel generator. To help combat the sound level produced by the open design, the engine alternator has been mounted to the base frame via anti vibration mounts. Always going the extra mile, Yanmar-Himoinsa designed this genset with a heavy duty exhaust muffler mounted with discharge rain cap to ensure quieter usage.

Yanmar-Himoinsa HYW 30 M5 Open Diesel GeneratorThe YANMAR – HIMOINSA HYW-17 M5 Open Diesel Generator

Rated at 13.1kVA and driven by Yanmar’s efficient 4TNV88 diesel engine, this genset has an impressive 18 hour run time with only a 60 litre fuel tank! This generator is excellent for use in light construction or agricultural work, but could easily find its home with you as part of your own off-grid power backup.

Yanmar-Himoinsa HYW 35 T5 Open Diesel GeneratorThe YANMAR – HIMOINSA HYW-35 T5 Open Diesel Generator

This 34kVA prime Three Phase genset operates with a Yanmar 4TNV98 diesel engine as its core. This heavy duty set was built with the work site in mind and finds its ideal use in agriculture, mining and construction. It sports a 120 litre fuel tank and an impressive 21 hour run time – and is, of course, backed by a full manufacturer’s warranty.

Yanmar Himoinsa HYW 45 T5 Open Diesel GeneratorThe YANMAR – HIMOINSA HYW-45 T5 Open Diesel Generator

With an output of 41kVA prime and a 17 hour run time at 75% load, this efficient genset houses a reliable Yanmar 4TNV98 diesel engine.  This versatile genset has a range of applications, from residential emergency backup, home use with an existing solar system, to mining and construction site use. And if sound level is a concern, the genset can be upgraded with a steel residential silencer, reducing total volume output by 35dB(A)!

Yanmar Himoinsa  HFW 85 T5 Open Diesel GeneratorThe HFW-85 T5 Himoinsa Open Diesel Generator

This powerful Himoinsa genset is powered with an economical & durable Iveco NEF45 SM diesel engine coupled to a Mecc Alte alternator. At 84kVA, this workhorse is suited for work in industrial settings, as well as mining, construction and IT / Telecommunication back-up.

We hope our list helps make your decision easier, but if you still aren’t sure if a canopy diesel generator or an open diesel generator is right for your needs, our experts would be happy to assist you. Feel free to send us an email through our contact page or call 1300 767 257 to get immediate assistance from one of our team members!

A word from the editor

Aaron Generator PowerMy name is Aaron Robins, I’m the sales manager at Generator Power. I have been in the generator game for over 10 years. I have supplied generators to residential and commercial clients for a wide range of various uses. My aim in writing this short article it that I may be able to arm you with the right information in order to help you make a wise decision. There are many people who make poorly informed decisions in my industry. This commonly results in loss of finances, wasted time and bucket loads of stress. I believe in doing a job right the first time and with as little stress possible. As a result I aim to educate potential customers so that people avoid these issues before they happen.

Contact Generator Power and let us run through our Generator Needs Analysis in order to help you make the right choice up front!

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