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Old 06-09-2021, 04:59 PM   #1
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Electrical System Upgrade - 2021 Airstream Atlas

I got this in the mail today - looks like some upgrades available ….

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Old 06-09-2021, 06:44 PM   #2
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Hi

That sounds like swapping out hardware. From what I've seen, it's really about re-programming the firmware. Simply put: it's a software / settings update.

Bob
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Old 06-11-2021, 07:27 AM   #3
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It's not a lot, but it's more than I've ever seen AS do before for rigs already sold and out in the field. Competitive pressure, perhaps? Enjoy!
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Old 06-12-2021, 06:25 AM   #4
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It's not a lot, but it's more than I've ever seen AS do before for rigs already sold and out in the field. Competitive pressure, perhaps? Enjoy!
Hi

..... or maybe there's a safety issue buried in there ....

Bob
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Old 06-12-2021, 10:17 AM   #5
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Interesting to know what 'other charge device settings' they will adjust and how they will 'reduce electrical draws'. I suspect older model years could benefit from this. Or maybe the 2020 and 2021 model years are REALLY BAD, and they are just returning them to the BAD configuration of earlier years.
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Old 06-12-2021, 10:22 AM   #6
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Originally Posted by Titus View Post
Interesting to know what 'other charge device settings' they will adjust and how they will 'reduce electrical draws'. I suspect older model years could benefit from this. Or maybe the 2020 and 2021 model years are REALLY BAD, and they are just returning them to the BAD configuration of earlier years.
Hi

Some Interstates have the Victron DC/DC between the alternator and the house batteries. It has charge profiles / lithium settings just like the Magnum inverter / charger and the Blue Solar MPPT.

Static draw might be referring to an update on the control panel firmware ...

Bob
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Old 06-14-2021, 12:24 AM   #7
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I got this letter as well. Airstream is just swapping the Magnum out with the proper one.

the Magnum inverter/charger that were installed on early 2021 Interstate / Atlas do not support charging Lithium batteries. there's no charge profile for Lithium.

The "wrong" Magnum can not be reprogrammed to add Lithium profile, it must be replaced with the proper one.
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Old 06-14-2021, 07:48 AM   #8
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Based on my personal experience and what others have posted, here's what we KNOW is wrong on the initial production lithium packages (generally the first 6 months of production of the 2021s):

1. The Magnum MMS1012 Inverter/Charger under the front passenger seat was the NON-lithium version (non "L" model), thus, does not charge lithium batteries correctly.
Fix: It needs to be replaced with the "L" model.
2. The Magnum ME-RC50 remote control located in the upper electronics locker also is the NON-lithium version.
Fix: It needs to be replaced with the ME-RC50-L model so it has the lithium profile (I called Magnum and it seems the firmware cannot be upgraded).
3. The Victron MPPT 150/35 BlueSolar Charge Controller buried in the upper electronics cabinet behind the panel was shipped with the default AGM battery charge profile.
Fix: The rotary dial setting on the bottom of the unit needs to be changed to "7" for lithium batteries.
4. The BatteryMINDer 128CEC1 Maintenance charger located under the driver's seat was not set to it's highest charging rate of 8A. This is for charging the Mercedes chassis battery off shorepower, not for the lithium house batteries.
Fix: change the setting on the top to 8A via the push button.

Note: To verify if the correct Magnum "L" versions are installed for items #1,2 above, I posted some instructions here.

Here's what else could be wrong but unconfirmed:
1. The Victron Buck-Boost DC-DC Converter (charger) under the driver's seat may also have incorrect lithium charging settings and/or excessive parasitic draw. It requires a laptop connection to verify so again, this is speculative.


In addition to above, here are some factory quality issues that have been experienced or reported for the Victron MPPT 150/35 BlueSolar Charge Controller:
1. On my 2021 unit, the "PV" + and - wires were reversed from the factory, rendering my house battery solar charging useless until I found the problem and fixed it. (The dealer couldn't find it themselves.)
2. Others have reported loose (but not necessarily reversed) wires going into the controller which reduced the charging effectiveness. Once corrected, their solar charging seemed to be operating correctly.

I addressed most of the above items myself, ahead of the recall notice, but it will be interesting to see what the dealer actually fixes. Whoever takes theirs in, please post your experience here.
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Old 06-14-2021, 08:03 AM   #9
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Quote:
Originally Posted by WA_Airstream View Post
I got this in the mail today - looks like some upgrades available ….

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Interesting shadows.
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Old 06-15-2021, 12:51 AM   #10
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Quote:
Originally Posted by WeekendBob View Post
1. The Victron Buck-Boost DC-DC Converter (charger) under the driver's seat may also have incorrect lithium charging settings and/or excessive parasitic draw. It requires a laptop connection to verify so again, this is speculative.

there's a software to download on Victron website, it requires a windows laptop. I have yet to check mine. I always had a feeling it wasn't programmed properly. mine doesn't seem to be charging the house batteries when driving.
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Old 06-15-2021, 11:26 AM   #11
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there's a software to download on Victron website, it requires a windows laptop. I have yet to check mine. I always had a feeling it wasn't programmed properly. mine doesn't seem to be charging the house batteries when driving.
Hi

When you do download the Victron software, set aside a nice calm afternoon to dive into it. It *may* work fine first time / no trouble at all. It also may take a bit of "quality time" to get past this and that feature of how it does its thing. Some of there stuff is fine, other packages not so much..... user experience also seems to vary depending on exactly what Windows machine you have.

Bob
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Old 06-15-2021, 03:10 PM   #12
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thanks WeekendBob. fantastic summary!
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