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Inverter Generators

Old 06-02-2018, 11:06 AM
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Default Inverter Generators

I clearly understand the benefits of an inverter generator, but have some questions. For my power needs, a pair of Honda EU2200i's in parallel would be ideal. Researching whole house generators however, you can buy an 8KW natural gas unit for around the same cost, plus they typically include a transfer switch. The nice thing about the whole house version, is with the transfer switch and automatic switch-over, if I'm not home during the outage, I'll have back-up power keeping my fridge running until I get home.

The question I have is, I don't see that these whole house generators are inverter technology, or at least it's not called out in the literature. Does that imply that they do not utilize inverter technology? If not, do they have the same technology as a typical generator? I know Honda makes some generators with DAVR (digital automatic voltage regulation), so I don't know if perhaps the whole house generators have some sort of power management or not. I would imagine DAVR is likely in between a regular generator and inverter generator for power quality.
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Old 06-02-2018, 11:25 AM
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Pretty rare for house or other backup gennies to use inverter tech. Inverter tech allows gen to run at a variable speed so can be much more quiet and efficient at low load. But the electronics have a cost and it gets substantial when you get into several kW. A packaged house backup unit can be made very quiet with enclosures, and as a backup efficiency is not that important. Pretty much all of them are synchronous rotating field machines (constant rpm). Might have elaborate voltage regulation, but even the most basic VR works fine.

I would not bother trying to find something in that size with inverter tech.
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Old 06-02-2018, 12:03 PM
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Originally Posted by Corndog38 View Post
I would not bother trying to find something in that size with inverter tech.
I think that may be the crux of the issue. Perhaps I'm falling prey to the "sensitive electronics" positioning, and I'm sure an inverter is the best for that. I'm sure my new Kitchenaid fridge is full of boards with sensitive electronics. I'd sure hate to fry a $3K fridge with a $500 generator!
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Old 06-02-2018, 12:25 PM
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A synchronous rotating field machine does have a pretty decent sine wave output even with a crude VR. Can get some dips/spikes with load acceptance and shedding but the inverter would have some of that too.

A $500 gennie could have a real mess as an output. I would not go too cheap.
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Old 06-11-2018, 12:29 PM
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https://tools.woot.com/offers/wen-56...gn=woot_widget

No input as to how these WEN units perform, but when i saw it i remembered this thread the other day. I can say that I've had a Honda 2000 for years and it has worked flawlessly. I've had it since we were using them to demo military satcom and we would run +$200K work of equipment off of them and also ship them overseas to Iraq and Afghanistan for service members to run their equipment off of. So i would trust the Honda to power anything i own. But those cost more than twice what this unit is selling for. $400 seems like a steal if it is as reliable and wouldn't fry my stuff....
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Old 06-11-2018, 03:31 PM
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Originally Posted by KIMDer View Post
https://tools.woot.com/offers/wen-56...gn=woot_widget

No input as to how these WEN units perform, but when i saw it i remembered this thread the other day. I can say that I've had a Honda 2000 for years and it has worked flawlessly. I've had it since we were using them to demo military satcom and we would run +$200K work of equipment off of them and also ship them overseas to Iraq and Afghanistan for service members to run their equipment off of. So i would trust the Honda to power anything i own. But those cost more than twice what this unit is selling for. $400 seems like a steal if it is as reliable and wouldn't fry my stuff....
Glad to see this Wen generator on sale at Woot! I bought another one.
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Old 06-11-2018, 03:54 PM
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I have two of the WEN generators and the parallel module. So far they have been extremely reliable.
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