Need advice to buy a generator

[KUMARA SHP]

Hello, here is my problem. I am buying two (2) TurboChef Fire Pizza Ovens (spec sheet attached). I want to know what kind of generator I would need to power them both up and run them continuously safely. My preference in generator is the Honda EU class for its low noise levels but any other model would do should I have to change based on what my needs are (All Honda Models spec sheet attached). I obviously still need enough juice to power up two 50inch LED TV's, a few refrigerators, AC unit, and exhaust fans, but in all honestly that a bit easier to figure out since they use 110v. My question is:
What would be the most cost effective way to make this ALL work smoothly? Would I possibly need 2 generators to make this work?

I think it is related with horse power
but not sure how?

please suggest me a generator or advice me

I like if you suggest because I am going to buy it

I can't add honda generators.pdf file because it is large.

however tell me how to select it?

should we consider the starting wattage of all devices or normal one?

 

[Bluejets]

The 2 ovens are rated at around 5kw (3 phase) plus "a few refrigerators" which is not a loading that I can relate to(much like saying I want a belt about this long).
Same with 2 50"tv's , not a recognised loading. So on and on......
Since the oven units are 415v 3 phase, then the generator will have to supply the same configuration, as a result the phase to neutral voltage will be 240volt.
This brings another probem with any 110v equipment as it would be expensive to supply transformers for all this "auxiliary equipment".
Better to get 240v gear.
Educated guess brings the generator in at around 20kva 3 phase.
I say 20kva because it is always the case where the generator is installed and the consumer comes along " oh, and I need this massive power chewing bain marie stuck on the gen set too please".
I doubt very much you will get any "quiet Honda" for this size.
Diesel would be the preferred fuel.
A quick stab at the cost, maybe Aus$75,000.00 .

 

[duke37]

You need to add up the power requirements of all the devices, the 60Hz version of one pizza oven uses about 5kW. Some devices do not take a nice sine wave and they will need a bigger power generator than the kW would imply.

I have not added up all the power requirements as you have not given the specifications. As a rough guess you should go for 30kW (40hp) to allow for starting transients.

 

[Bluejets]

Gensets are not rated in kw but kva as the power factor of the load is unknown.

 

[duke37]

A quick stab at the cost, maybe Aus$75,000.00

You could do it much cheaper than this if you buy an alternator which is driven by a farm tractor. You need to have the tractor and a big fuel tank of course !

 

[KUMARA SHP]

bluejets - what did you mentioned as 240V gear, is that somthing like transformer?

 

[Tha fios agaibh]

The 2 ovens are rated at around 5kw (3 phase) plus "a few refrigerators" which is not a loading that I can relate to(much like saying I want a belt about this long).
Same with 2 50"tv's , not a recognised loading. So on and on......
Since the oven units are 415v 3 phase, then the generator will have to supply the same configuration, as a result the phase to neutral voltage will be 240volt.
This brings another probem with any 110v equipment as it would be expensive to supply transformers for all this "auxiliary equipment".
Better to get 240v gear.
Educated guess brings the generator in at around 20kva 3 phase.
I say 20kva because it is always the case where the generator is installed and the consumer comes along " oh, and I need this massive power chewing bain marie stuck on the gen set too please".
I doubt very much you will get any "quiet Honda" for this size.
Diesel would be the preferred fuel.
A quick stab at the cost, maybe Aus$75,000.00 .

Spec sheet for oven says
single phase 230 or 240v. Single phase 20kw would probably suffice, but
It's silly to guess what loads might be.

 

[Tha fios agaibh]

To me its silly to convert gas to electricity to power electric ovens, when you could just use gas ovens. (And I'm an electrician) The most cost effective way would to use load shedding where all the loads would not run at the same time allowing less demand and the purchase of a smaller generator.

 

[Calmore]

That is a valid point. It may be more cost effective to sell the electric ovens and use the proceeds towards some new gas ones.

 

[KUMARA SHP]

thank you all
I ordered one according to your advice and my thoughts.
very helpful

 

[Tha fios agaibh]

No, you ordered one based on a wild guess.