Pro Power reserve limit fails

[chl]

Ford asked me to test the Climate bug so I ran three tests:
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June 12 - Test #1 at approx. 2:14pm:
PPOB ON no load - cord plugged into bed outlet but 0 power being used
Heated seat OFF
PPOB with truck off - not enabled
Power Down Timer - OFF
Pressed Climate button in App
PPOB did not shut OFF but...
the app displayed an orange triangle with exclamation point inside, the truck honked three times with a pause in between each honk, and no climate was turned on inside the truck.
Because PPOB did not shut off, I did not do a bug report.

When inside the truck I turned the heated seats ON to HIGH for next test and the PPOB stayed ON.
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June 12 - Test #2 at approx. 2:18pm:
PPOB ON no load - cord plugged into bed outlet but 0 power being used
Heated seat ON and on HIGH
PPOB with truck off - enabled
Power Down Timer - OFF
Turned truck OFF
Pressed Climate button in App
PPOB shut OFF
2:20pm turned truck ON and recorded bug report

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June 12 - Test #3 at approx. 2:44pm:
PPOB ON no load - cord plugged into bed outlet but 0 power being used
Heated seat OFF
A/C set to 72F and ON
PPOB with truck off - enabled
Power Down Timer - OFF
Turned truck OFF
Pressed Climate button in App
PPOB shut OFF
2:48pm turned truck ON and recorded bug report
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c

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[Space Flash]

Yes, I think so too, and I think the question is, "is it adequate" to avoid a low battery shut down?

With a healthy battery it may be, with a weak battery, maybe not.
With a light load on the PPOB, may not be a problem, with a heavy load, maybe not.

I sent the Ford guys our latest theory and evidence about what is happening and they asked me to run another test with the truck ON without using a battery maintainer presumably to see what the effects to the 12v battery are.

I keep my 12v on a maintainer consistently (if I remember to plug it in) and have since mid-2024, and I have a relatively light load on the PPOB (usually well under 1kW), so I am not sure how useful my systems info will be.

I did mention that weak 12v battery issues are a pretty frequent issue on the forums.

If Ford could do something to fix that issue of 12v battery maintenance/health it would solve a lot of problems.

Planning on using the PPOB on our new Lightning Flash during power outages. Do you take any precautions before you connect your battery maintainer? I've used a maintainer on all of our cars including our previous EV and everything worked fine just connecting it to the +/- terminals. But before I connect it to our new Lightning I just wanted to confirm that there isn't anything else I'd need to do. TIA!

 

[chl]

Planning on using the PPOB on our new Lightning Flash during power outages. Do you take any precautions before you connect your battery maintainer? I've used a maintainer on all of our cars including our previous EV and everything worked fine just connecting it to the +/- terminals. But before I connect it to our new Lightning I just wanted to confirm that there isn't anything else I'd need to do. TIA!

Yes, the negative should be connected to a ground point or down stream of the BMS sensor which is mounted to the negative battery terminal:

And of course take the usual precautions to avoid shorts or sparks, etc.

 

[Space Flash]

Yes, the negative should be connected to a ground point or down stream of the BMS sensor which is mounted to the negative battery terminal:

And of course take the usual precautions to avoid shorts or sparks, etc.

Got it. I actually used a chassis ground to avoid the shunt/smart sensor completely in our other EV, so this will be easier.

Thanks very much!

 

[chl]

Got it. I actually used a chassis ground to avoid the shunt/smart sensor completely in our other EV, so this will be easier.

Thanks very much!

Glad to help.

BTW check out the various ways people run the maintainer wire to avoid having to keep the frunk open"

https://www.f150lightningforum.com/forum/threads/charging-12v-battery.16979/

 

[dmd3home]

Back to the original....PPOB shuts down prior to the set reserve limit:

Yesterday I charged my Tesla with PPOB. It charged for 7 hours straight at 4kW....a fairly large load, with no shut down. Of course I did have the battery maintainer on the whole time. Next time I'll try it with no 12v battery maintainer. Can we guess what will be the result?

 

[Space Flash]

Glad to help.

BTW check out the various ways people run the maintainer wire to avoid having to keep the frunk open"

https://www.f150lightningforum.com/forum/threads/charging-12v-battery.16979/

Will do. Thanks again!

 

[chl]

FOR Pro owners in this thread. You might like to add bed lights. This is how to do it (I haven't done it yet, but parts ordered). Should make hooking up to PPOB at night easier!

https://www.f150lightningforum.com/forum/threads/xlt-oem-bed-lights-install.13467/post-722824

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