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Old 08-02-2017, 10:45 PM   #451
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AFAIK, the battery bank size in the Balmar is used to calculate the absorption time for lead acid batteries, either AGM or wet cells. On lithium, there is really no absorption time needed, so it could always be set very low to make it drop out of absorption very quickly to prevent holding at charging voltage, which is said to be bad for lithium. The maximum absorption time would also be set to the minimum time.

It would also be interesting to see the rest of the settings, as I think the Balmar also checks voltage at the start of charging and might go right to float if above 12.8v or so. At that point it might not show any output on the field, as it wouldn't need any amps to be generated if the voltage was above the float setpoint.

We see that with our solar, which will finish charging in absorption and then show discharging until the voltage drops to setpoint for float. If we plug in the Magnum at that point, it will not go to absorption and we still see discharge to the Magnum float setpoint, which is a bit higher than the solar one.
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Old 08-02-2017, 10:50 PM   #452
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AFAIK, the battery bank size in the Balmar is used to calculate the absorption time for lead acid batteries, either AGM or wet cells. On lithium, there is really no absorption time needed, so it could always be set very low to make it drop out of absorption very quickly to prevent holding at charging voltage, which is said to be bad for lithium. The maximum absorption time would also be set to the minimum time.

It would also be interesting to see the rest of the settings, as I think the Balmar also checks voltage at the start of charging and might go right to float if above 12.8v or so. At that point it might not show any output on the field, as it wouldn't need any amps to be generated if the voltage was above the float setpoint.

We see that with our solar, which will finish charging in absorption and then show discharging until the voltage drops to setpoint for float. If we plug in the Magnum at that point, it will not go to absorption and we still see discharge to the Magnum float setpoint, which is a bit higher than the solar one.
One of the folks we talked to today on the phone suggested we run down one module because it might not be showing enough "need" to trigger the charging. We ran it down to about 12.68 and just tried to charge it alone with the GU but that still didn't trigger anything. I would hope that the GU would charge lithium batteries that were not completely full, but that AGM heritage (and knowing exactly when a battery is full) might be a hindrance here.
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Old 08-02-2017, 11:00 PM   #453
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One of the folks we talked to today on the phone suggested we run down one module because it might not be showing enough "need" to trigger the charging. We ran it down to about 12.68 but still didn't trigger anything. I would hope that the GU would charge lithium batteries that were not completely full, but that AGM heritage might be a hindrance here.
Doesn't seem likely but is it possible that the solar input is confusing the regulator? It's easy enough to rule this out by shutting down the solar controller.
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Old 08-02-2017, 11:10 PM   #454
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AFAIK, the battery bank size in the Balmar is used to calculate the absorption time for lead acid batteries, either AGM or wet cells. On lithium, there is really no absorption time needed, so it could always be set very low to make it drop out of absorption very quickly to prevent holding at charging voltage, which is said to be bad for lithium. The maximum absorption time would also be set to the minimum time.
There is an AGM battery in the mix that wants a different charging sequence than the lithiums. But since it never delivers any load except during a lithium reset, perhaps it never requires absorption charging.
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Old 08-03-2017, 12:42 AM   #455
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... And the dealer here reimbursed and continues to pay for my hotel and offered me a car to drive in the meantime. They're taking care of me and making progress.

....
That's a class act.


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Old 08-03-2017, 12:44 AM   #456
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It is highly unlikely you got two bad regulators. More likely something either killed it or is shutting it off.

...

My same thought.


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Old 08-03-2017, 12:46 AM   #457
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That's a class act.



i'd really be impressed if he'd already paid for it and they did that.
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Old 08-03-2017, 12:48 AM   #458
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That's a class act.


I agree, I think it was a very good thing to get the owners involved. Hopefully, they will be able to get reimbursed from Roadtrek.
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Old 08-03-2017, 06:41 AM   #459
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I thought the dealership did a fine job with troubleshooting as far as I could tell. They got the part ordered and it came in this morning. Then it was two techs, one of the owners, and myself spending the day troubleshooting it and talking to people from Balmar, Nations, and RT.

At this point it seems this Balmar is not working either. It tested fine except for the top right blue wire coming out. He took the blue wire out and bypassed the regulator and was able to register a significant voltage increase in the ecotrek that way, so it seems it's just another bad Balmar. So another one is on the way that Nations guarantees will work because they're test it before the send it just to be sure. And the dealer here reimbursed and continues to pay for my hotel and offered me a car to drive in the meantime. They're taking care of me and making progress.

I don't have any reason to think we won't work through these issues and I'm very happy with the Warp Core. Haven't tested out the solar but the solar charge controllers indicate properly. There might be a tiny sliver of shading from the awning on one panel that may be an issue, but I'll troubleshoot solar later. It's far down the priority list.
Without providing sufficient information to troubleshoot the system it should be RT’s responsibility to send someone and resolve the issue instead of pushing the monkey on the dealer. It shouldn’t take a couple of hours to trouble shoot with a multimeter not by sparking and with a day for ordering you should be out in a day or two.

I wonder how do you envision a possible future failure while in the boonies. Lithium batteries are sensitive to wrong charging, what will happen if the fry, kaboom?
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Old 08-03-2017, 09:22 AM   #460
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I envision things working as advertised, safely.
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