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Onan Paralleled with an Inverter Based Machine?


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  #61  
Old 05-16-2019, 01:22:46 PM
Eric.S Eric.S is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

Where is your copper??
Benning Tebevert 48 to 220, 2.5kVA

Eric
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  #62  
Old 05-16-2019, 08:25:08 PM
Zephyr7 Zephyr7 is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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Negative on the HF. Got caps and lots of copper!
Why use finesse when brute force will do

Bill
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  #63  
Old 05-16-2019, 08:35:32 PM
Zephyr7 Zephyr7 is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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Where is your copper??
Benning Tebevert 48 to 220, 2.5kVA

Eric
I see your copper and raise you two 500kVA

Bill
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  #64  
Old 05-16-2019, 09:15:53 PM
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Default Re: Onan Paralleled with an Inverter Based Machine?

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I see your copper and raise you two 500kVA

Bill
A bit bulky for home/residential use.....

I'll squeak by with 8kVA continuous, 9kVA @ 30 minutes, 12kVA for about 5 seconds and maybe get 17kVA for all of 100ms!

Considering average loads are under 3kVA that's some decent head room.

Staying totally on topic, all my Onan's parallel/sync up perfectly with my "Inverter based machine" and provide load support if needed.

Under back up power conditions this is typical peak load numbers. Average load is under 2kVA.
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  #65  
Old 05-17-2019, 05:52:18 PM
grif grif is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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Invert until it Hertz. Or just take the stairs.....easy now, one step at a time, don't trip.
Groan,,,,,
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Old 05-17-2019, 07:07:20 PM
Zephyr7 Zephyr7 is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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Groan,,,,,
That’s what happens when you’ve been zapped one too many times by the stuff you’re working on... I do that too

I think I’ve been zapped by all the usual AC voltages up to 480, DC from the -48vdc plant at work, 150 vdc or so from a telecom “wet loop” (common on old repeatered T1 circuits) and 370 or so vdc from an inverter I was building. 20Hz 90v AC telephone ringing voltage (some idiot always calls when you’re working on the lines). Friends on the other side of the pond say to try getting zapped by 50 Hz sometime.

All us tech people have to let our crazy out somehow. Right now for me that’s listening to Russian pop music and reading the ‘Stak while my wife bakes pie Ани Лорак хорошо певица

Bill
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Old 05-17-2019, 07:30:43 PM
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Default Re: Onan Paralleled with an Inverter Based Machine?

Певица Ани Лорак !
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Old 05-17-2019, 07:44:15 PM
Zephyr7 Zephyr7 is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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Певица Ани Лорак !
There are better pics of her out there, or just watch this video: https://m.youtube.com/watch?v=1Yjm9HlIaJo
Of her song “оранжевые сны“ (“orange dreams”).
I like her song “Обними меня” (“hold me”).

Bill
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Old 05-18-2019, 06:39:44 PM
grif grif is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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All us tech people have to let our crazy out somehow.

Bill
CRT connection on a clam shell looking terminal that was right at your wrist when you were doing any adjustments on the logic board. All the adjustments were right where you were always getting hit.

Only gen set I've ever seen actually sync up on AC is a 15MW hydro plant,,,, syncing up to the grid. For working around that unit from 1993 I never got close to the big electricity guys,,, always comms or IT.
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Old 05-21-2019, 12:48:29 AM
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Default Re: Onan Paralleled with an Inverter Based Machine?

You could probably combine the power output of a SBC 350 with a Harley Davidson 103 Twin Cam and almost make a BBC 454. With some very fancy engineering. Almost. It falls under the jurisdiction of "You could, but why?"

Or you can just get a legit 454, bolt it in and be done. If you need a bigger generator, just get one! No replacement for displacement...er kW.

Inverter gens exist for one purpose: Fuel economy and noise reduction. OK, that's two.

Normal Gen is fuel being turned into noise, heat and electricity, even if the former offends, the intermediary is a hazard and the later is wasted.

Fun thread.

Not practical. I get it.

Later edit:

Probably mentioned, but inverter and a normal gen don't have the same sine wave. Correct me if wrong but most inverters create a squared off sine wave. Like an UPS. As one one failed Trig 101.

Last edited by TLB01; 05-21-2019 at 01:19:55 AM.
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Old 05-21-2019, 02:10:14 AM
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Default Re: Onan Paralleled with an Inverter Based Machine?

I like the concept of two generators. A small one, and a large one. This way, you can run the small one to make your fuel reserves last longer when it is sufficient, use the large one when it's extra power is needed, and have redundancy, so you're never left in the dark!

If I had a DC system, I would make them parallelable. With AC, this is quite a challenge, unless you have the inverter sets.

I also appreciate the advantage of these inverter sets, but I like the opposite end of the spectrum. Rugged simplicity. 1200 rpm. Magneto ignition. No electronics. Simple relay controls that are easy to service, troubleshoot, repair, or even bypass if needed.
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Old 05-21-2019, 07:18:05 AM
armandh armandh is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

+1 on KISS

even the unloved "G" brand makes a few.

their V twin in a construction model
except for being a 3600 screamer
potted e-gov and VR

simple relay control
and only max loading to 2/3 of the alleged continuous rating.
I hope provides the longevity

13 yrs old about to get another battery
and the only other problem
"sticky fuel pump check valve"
was easily cleared

the 2nd [smaller] backup is a 1964 vintage 1800 rpm opposed twin Kohler powered Homelite
induction regulated mechanical gov. same fuel problems.
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  #73  
Old 05-21-2019, 09:40:40 AM
Zephyr7 Zephyr7 is offline
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Quote:
Originally Posted by TLB01 View Post
Probably mentioned, but inverter and a normal gen don't have the same sine wave. Correct me if wrong but most inverters create a squared off sine wave. Like an UPS. As one one failed Trig 101.
Cheap inverters tend to put out a so-called “modified” sine wave, which tends to be a square wave stepped back at the zero crossings so that the RMS voltage is close to that of a “true” sinewave.

Better inverters put out a true sinewave. The big UPSes I work with at work do, for example, as do many smaller ones that are in the higher-end product lines (like APC SmartUPS, their low-end BackUPS line is a modified sine).

It’s actually pretty easy to build a true sine wave inverter that runs PWM into a low-pass filter. That has he advantages of stable frequency regardless of load, and easy/fast voltage control.

That said, I also like the simplicity of a “regular” generator. Less stuff to break.

Bill
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  #74  
Old Yesterday, 06:01:10 PM
Eric.S Eric.S is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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(like APC SmartUPS, their low-end BackUPS line is a modified sine).
Look here
www.hardwareinsights.com

Eric
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Old Yesterday, 07:59:33 PM
Zephyr7 Zephyr7 is offline
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Default Re: Onan Paralleled with an Inverter Based Machine?

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Interesting site. Someone sure put in a lot of time with their 'scope!

Bill
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