Author Topic: Going off-grid in Idaho  (Read 607 times)

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Offline Pete

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Re: Going off-grid in Idaho
« Reply #30 on: May 07, 2020, 04:17:23 am »
Painful Process Doc.
Sure is a lot of work to get a supposedly working inverter to work.
Pity they are not designed well in the first place.
good to know that you have a good dose of perserverence.
Maybe a bicycle frame and a generator would be easier, just peddle whenever you want power. Not so much to go wrong.
It is good to read of your experiments
Pete

Offline dochubert

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Re: Going off-grid in Idaho
« Reply #31 on: May 08, 2020, 11:01:20 pm »
Well I did some troubleshooting with Sean (by text) and he thinks the charger/output board portion of the control board is the culprit.  Doesn't seem that likely, but willing to let him lead since I feel it has to be something to do with his control board, and this way at least he's taking some responsibility.  No reason to suspect my transformers.  (When was the last time you ever heard of a transformer spontaneously "going bad"?)
He is sending my other "tested" control board/mainboard set that I already paid for, plus a replacement charger /output board for this one.  Supposed to be here Monday.
Will try to be patient till Monday.
Ommmmmmmmmmmm.........
"War does not determine who is right - only who is left." -- Unknown

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Offline dochubert

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Re: Going off-grid in Idaho
« Reply #32 on: May 12, 2020, 05:27:36 pm »
Well, my parts got sent to Georgia.
I live in Idaho.  (I checked!)
Customer in Georgia is supposed to be forwarding package to me.  No idea when it will get here (if ever!)
Chances of "damaged in shipping"  just doubled!

At least my luck is consistent...
"War does not determine who is right - only who is left." -- Unknown

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Offline dochubert

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Re: Going off-grid in Idaho
« Reply #33 on: May 14, 2020, 04:03:06 pm »

Parts arrived!  Nothing appears broken!  It's a miracle!
"War does not determine who is right - only who is left." -- Unknown

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Offline dochubert

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Re: Going off-grid in Idaho
« Reply #34 on: May 18, 2020, 08:36:33 pm »
I suspected the charger board wouldn't fix it.  Nothing fixes it.  Tried swapping parts from the new set.  Same results. 
I have to face the unpleasant conclusion that there is something wrong with my transformers.  Don't see how.  But there is nothing else in the mix. 

So, going to take a left turn, pull out my hybrid inverter made from my other 15kw powerjack case and transformers with a new chinese inverter board, and rework it back to full powerjack with the second set from Sean.  Now that I have just tested these transformers.  Here it is with the generic inverter installed.

8561-0
8563-1

I pulled it out, opened it, checked it, powered it up, let it run for awhile, checked voltage and frequency, then turned it off. 
Commenced to remove the inverter board.  Also removed bolts and plates from the 2 transformers in this unit.  This one has two As3 transformers (about 3000w each).  The 3 transformers in the other unit are As2 (2000w).  I need to make some blocks to set the two transformers on like I did with the other transformers.  Add a couple of fans on top of each xfmr.  Pull the endplate and mod the output like I just did with the failed unit.

So with the second mainboard/control board set installed with these tested xfmrs, It either proves the other xfmrs bad or that something "else" is at fault.  It pretty much HAS to be the xfmrs at this point.
Work to do...
"War does not determine who is right - only who is left." -- Unknown

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Offline Pete

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Re: Going off-grid in Idaho
« Reply #35 on: May 18, 2020, 09:38:25 pm »
Hi Doc, just wondering if it is possible to try the inverter that you suspect has bad transformers with just one of transformers at a time connected.
There is a chance that one of the transformers may have a short and be pulling the other down with it.
Or they may not be connected right, possibly they have paralleled them with one transformer fighting the others.
Just a thought
Pete

Offline dochubert

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Re: Going off-grid in Idaho
« Reply #36 on: May 20, 2020, 09:21:34 pm »
Hi Pete,
You are exactly right.  Next step with that inverter is to test transformers individually. 
Before I do that, however,  I'm hoping to get at least one of these 2 older style inverters working.  Putting the second board set into the other inverter with it's tested transformers seems a quicker way to get one running.  At the same time it verifies that the transformers have to be the problem in the first inverter.
Then I'll go back and test transformers. 
I expect that you are correct that one is pulling the other two down.  Ready to soon get this solved and move on.....
"War does not determine who is right - only who is left." -- Unknown

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Offline dochubert

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Re: Going off-grid in Idaho
« Reply #37 on: May 23, 2020, 10:32:31 pm »

Just when I thought it couldn't get any stranger, it does!

Got the 'second set' installed in the 2nd powerjack.  Powered it up.  Lights up and runs.  No flashing lights.  No beeping.  Great, right?
Just one problem.  Output voltage is not 240/120 volts.  Instead I get 120/60 volts out.  Huh?
Checked and rechecked everything.  Same result.  Inverter mainboard is putting 16-17 volts into the transformers (just as a 24v inverter would do)

So the first inverter with the first complete control board/mainboard set in it blinks, beeps and won't start up.
The second inverter with the second set starts and run perfectly...  at half voltage.
Wonderful!

I guess now I will have to take the blinking control board and put it in the other inverter and see what happens.  Tomorrow....
"War does not determine who is right - only who is left." -- Unknown

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Offline Pete

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Re: Going off-grid in Idaho
« Reply #38 on: May 24, 2020, 05:34:23 pm »
Wow Doc, you sure are having fun!
Sounds like someone who connects the transformers isn't quite up to the job.
Maybe they paralleled the secondary windings rather than series .
Good luck
Pete