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Old 08-05-2017, 05:40 PM   #511
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The more I read this thread, the more relief I feel in dodging a bullet.
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Old 08-05-2017, 05:58 PM   #512
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The more I read this thread, the more relief I feel in dodging a bullet.

You would know wincrasher, since you had pulled the trigger.

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Old 08-05-2017, 07:29 PM   #513
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The more I read this thread, the more relief I feel in dodging a bullet.

Not every bright-eyed fanboy agrees with you.
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Old 08-06-2017, 01:22 AM   #514
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The more I read this thread, the more relief I feel in dodging a bullet.
Sometimes yes sometimes no. many have them with everything and they work fine. a few do not.
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Old 08-06-2017, 02:09 AM   #515
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Sometimes yes sometimes no. many have them with everything and they work fine. a few do not.
It's distantly analogous to the conundrum that faces the press when they are chided for gruesome inflammatory journalism. The somber fact is that they would all go broke trying to sell newspapers reporting that nothing bad happened today.

The fact of life is that those folks that experience problems are understandably vocal about expressing their dissatisfaction Those that experience few or no problems and are happy as clams in the sand are less likely to express that sentiment.
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Old 08-06-2017, 02:28 AM   #516
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At the risk of being a nay-sayer, I would contend that a lithium battery system that costs tens of thousands of dollars and loses 2% of its capacity PER HOUR when just sitting there is not exactly working "fine". Getting by usable, maybe, but you really need to have an extra 200ah module compared to a system without that much parasitic to have near the same real capacity in use, and that costs $. That is how much capacity wet cells, which lose much more than AGMs, lose in a MONTH of sitting.
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Old 08-06-2017, 02:42 AM   #517
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I've been very happy with the lithium so far. Yesterday I boondocked from 1pm until 6am the next morning using just one of the eight EcoTreks and when I pulled chocks in the morning, it still had more than half of its capacity. And I wasn't even being all that energy conserving.

And when the sun was up, I was running purely off solar without the battery taking a hit.

The air conditioner, however, is an issue. I'll be blogging about it soon in more detail, but today it ran for 1.5 hours while I was driving, low 70s outside and mostly overcast and it reduced the temp inside the coach by only one degree. As soon as I turned the AC off, within minutes, it was back up to the original temp (which is an insulation issue, not the A/C). Fifteen minutes later it was 83F in the coach despite being low 70s outside and mostly overcast.

Pulled into a KOA with shore power and ran it on max tilt and it couldn't even get the coach colder than it was outside. Still overcast.

Either the A/C does not work or the A/C is a total waste of roof space that would be better replaced with an additional solar panel and a better fan system to circulate air.

No way this thing would be livable in Florida during the summer. Not a chance.

One thing I find interesting is the different readings from the two solar charge controllers. Sometimes they both have a slow flash showing the battery bank is fully charged. Sometimes, however, one shows the batteries are fully charged and the other does not. Makes me wonder if one solar charger is charging some of the batteries, and the other is charging others instead of both charging all.

But the solar charger is a good way to see if the batteries are full in addition with the 13.6 voltage reading.

I'm very happy with this RoadTrek so far, except for the air conditioning.
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Old 08-06-2017, 03:02 AM   #518
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At the risk of being a nay-sayer, I would contend that a lithium battery system that costs tens of thousands of dollars and loses 2% of its capacity PER HOUR when just sitting there is not exactly working "fine". Getting by usable, maybe, but you really need to have an extra 200ah module compared to a system without that much parasitic to have near the same real capacity in use, and that costs $. That is how much capacity wet cells, which lose much more than AGMs, lose in a MONTH of sitting.
Your math is spot on but I think you're leveling your volley at the wrong target. The losses involved here are not from a battery with chemistry that invites excessive local discharge. Lithium bstteries seem to have local discharge rates equal to or lower than AGMs. The culprit is the BMS that uses power totally disproportionate to to what should be necessary to fulfill it's mission. The sensors that simply monitor temperature, voltage, power delivery and charge rates involve circuitry operating a signal levels. The remaining viable suspect are the BMS power relays that control the load and charging ports. Redesigned to use bi-stable relays, I don't think the "parasitic" loss would be any higher than it is on the Silverleaf system.

Now whether these lithium batteries provide the return on investment compared to a slug of AGMs that admittedly may have a shorter service life than lithiums, well, that's a different kettle of fish. The RT 6 year non-prorated warranty alleviates some concern with this yet to be determined equation. The incidence of the number and the depth of discharge of these batteries will largely depend on how they are used. Paradoxically,for RT, the larger the battery bank they install, the less likely there will be battery failures within the warranty period but the more likely there will be failures from overworked inverters and altternators.
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Old 08-06-2017, 11:08 AM   #519
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................ it still had more than half of its capacity..................
How do you know remaining capacity?

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................ Makes me wonder if one solar charger is charging some of the batteries, and the other is charging others instead of both charging all..................
Ask & find out the answer. It would be good to know.

Sounds like you're having fun.

Maybe someone here will comment on the air conditioner performance in a RT Sprinter to give you an idea if it should work better than what you've experienced.
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Old 08-06-2017, 11:46 AM   #520
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I've been very happy with the lithium so far. Yesterday I boondocked from 1pm until 6am the next morning using just one of the eight EcoTreks and when I pulled chocks in the morning, it still had more than half of its capacity. And I wasn't even being all that energy conserving.

And when the sun was up, I was running purely off solar without the battery taking a hit.

The air conditioner, however, is an issue. I'll be blogging about it soon in more detail, but today it ran for 1.5 hours while I was driving, low 70s outside and mostly overcast and it reduced the temp inside the coach by only one degree. As soon as I turned the AC off, within minutes, it was back up to the original temp (which is an insulation issue, not the A/C). Fifteen minutes later it was 83F in the coach despite being low 70s outside and mostly overcast.

Pulled into a KOA with shore power and ran it on max tilt and it couldn't even get the coach colder than it was outside. Still overcast.

Either the A/C does not work or the A/C is a total waste of roof space that would be better replaced with an additional solar panel and a better fan system to circulate air.

No way this thing would be livable in Florida during the summer. Not a chance.

One thing I find interesting is the different readings from the two solar charge controllers. Sometimes they both have a slow flash showing the battery bank is fully charged. Sometimes, however, one shows the batteries are fully charged and the other does not. Makes me wonder if one solar charger is charging some of the batteries, and the other is charging others instead of both charging all.

But the solar charger is a good way to see if the batteries are full in addition with the 13.6 voltage reading.

I'm very happy with this RoadTrek so far, except for the air conditioning.
Are you sure you have the air conditioner running and not just the fan thats in the air conditioner?.. you need to set the Fan on AU and then set the air conditioner on. Have you practiced sliding the vents on the air conditioner? there are 3. one at each end and the one that lets full blast straight down in the middle. also a fan on the floor helps with spreading the air around
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