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Potential Taycan fleetwide battery replacement in 2025

ZenicaNC

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the HEM is a power flow manager from Porsche - works with Solar - GRID - EVSE's and manages power flow to avoid too much power being drawn from the grid - the PMCC and PWCC integrate with it and I presume can adjust their power flow to take advantage of solar power

I'm also guessing with multiple EVSE"s it will do load balancing to stay with in a total amp budget, but I honestly don't know - it's not a Product for North America but it does exist…

the HEM causing the Taycan's battery to catch fire was obviously satire (hopefully).

here is a link to the HEM product page from Porsche - it does exist but not for North America

https://tequipment-finder.porsche.com/uk/J1/Taycan/&ac=product&pr=B281BB0139B23934C125853B00606071
Yea, I got the satire. I guess my 1/4 house comment was too dry. Given how lithium batteries burn, it wouldn't be limited to 1/4 of the house. Not a NA product?, guess that's good in a way, for NA!
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daveo4EV

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Yea, I got the satire. I guess my 1/4 house comment was too dry. Given how lithium batteries burn, it wouldn't be limited to 1/4 of the house. Not a NA product?, guess that's good in a way, for NA!
just making sure!!

the HEM is a pretty good idea and mirrors what enphase/clippercreek/Tesla/wallbox can do when you have multiple EVSE's charging at the same time - adjust the charge rate to maintain an over all budget - Tesla will do the same thing with PowerWall+Solar+EVSE to have the EVSE only use "excess" solar to charge the car - something like a HEM is going to be a thing going forward in North America in the next 5+ years - manage batteries, solar, EV charging, and overall house demand plug load shift time of day usage…
 

ZenicaNC

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Yes, I can see the benefit, for those on solar wishing not to pull from the grid. I would like solar but the more I read about insurance companies using the roof as an excuse to dop policy holders in areas where once-in-a-lifetime storms are occurring once-a-year has me skittish about roof top solar. I've read that people with 5 to 10 year old roofs being told to replace them or get dropped on renewal would be in an even deeper *hole if they had to contend with solar panels. (as if the prospect of replacing a viable roof wasn't enough)
 

daveo4EV

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Yes, I can see the benefit, for those on solar wishing not to pull from the grid. I would like solar but the more I read about insurance companies using the roof as an excuse to dop policy holders in areas where once-in-a-lifetime storms are occurring once-a-year has me skittish about roof top solar. I've read that people with 5 to 10 year old roofs being told to replace them or get dropped on renewal would be in an even deeper *hole if they had to contend with solar panels. (as if the prospect of replacing a viable roof wasn't enough)
removing panels and putting them back on is no big deal once the roof has been modified to support it…the footings to mount the panels are no different than any roof attachment - it's not $0 cost, but the panels are reasonably light, easy to disconnect and put back on...

my solar company will remove/reinstall the panels when it's time for roof job for $950 - and the 24 panels will take less than 3 hours to remove, and 3 hours to reinstall

most roofers in California have no problem re-roofing around the solar "mounts" as long as the panels are set aside…

my roof is a 25+ year roof and we're about 10 years into that - removing the panels when a new roof goes on isn't my biggest concern, and I might use the opportunity to take old panels off and put new more efficient panels back on generating more power for the same square footage…

the roof replacement before the end of it's useful life is a bigger deal and more cost than messing with the panels…panels remove/install is not that big of a job and noise vs. the cost of the core roofing work.
 

daveo4EV

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Yes, I can see the benefit, for those on solar wishing not to pull from the grid. I would like solar but the more I read about insurance companies using the roof as an excuse to dop policy holders in areas where once-in-a-lifetime storms are occurring once-a-year has me skittish about roof top solar. I've read that people with 5 to 10 year old roofs being told to replace them or get dropped on renewal would be in an even deeper *hole if they had to contend with solar panels. (as if the prospect of replacing a viable roof wasn't enough)
if you're being forced to replace a roof that's the perfect time to "add" solar - solar install is 50% roofing job, 30% wiring/hookup for the panels, 10% panel install, 10% paperwork for "approvals" from local power company - if you're touching a roof and not considering installing solar you really should - in some cases the roof job might be eligible for the solar tax credits as part of the overall "solar" job -making the roof job cost less due to tax benefits.
 


ZenicaNC

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if you're being forced to replace a roof that's the perfect time to "add" solar - solar install is 50% roofing job, 30% wiring/hookup for the panels, 10% panel install, 10% paperwork for "approvals" from local power company - if you're touching a roof and not considering installing solar you really should - in some cases the roof job might be eligible for the solar tax credits as part of the overall "solar" job -making the roof job cost less due to tax benefits.
Our house had a new roof installed a year before we bought it in 2022. IF this house had a basement and was our (in as much as anyone can forecast) forever home, I'd add solar but given we plan to sell within the year and look for a home that has a basement, it wouldn't be a good use of funds or time. Not having a basement feels like living in a shed. Our last home in PA had a beautifully finished basement with 10 foot ceilings, doric columns and judges paneling throughout. We miss that but that house sold much faster than we expected, and it was much harder finding something in the Triangle of NC so we settled.

The cost to have the solar people come remove the panels is far more economical than I imagined. In the grand scheme of replacing a roof, that is a marginal cost.

If we add solar to the new house, I will take the EcoFlow Delta Pro Ultra battery system we have now and just need to install a new Smart Home Panel. It can't do the things the Porsche system can but our electric rate isn't based on time or usage. It's a fixed .11 cents per kilowatt.

Maybe by then, the new Taycans will allow for two way flow through the chargeport and it can power the house if the grid is down long enough to deplete my EcoFlow.
 

daveo4EV

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Our house had a new roof installed a year before we bought it in 2022. IF this house had a basement and was our (in as much as anyone can forecast) forever home, I'd add solar but given we plan to sell within the year and look for a home that has a basement, it wouldn't be a good use of funds or time. Not having a basement feels like living in a shed. Our last home in PA had a beautifully finished basement with 10 foot ceilings, doric columns and judges paneling throughout. We miss that but that house sold much faster than we expected, and it was much harder finding something in the Triangle of NC so we settled.

The cost to have the solar people come remove the panels is far more economical than I imagined. In the grand scheme of replacing a roof, that is a marginal cost.

If we add solar to the new house, I will take the EcoFlow Delta Pro Ultra battery system we have now and just need to install a new Smart Home Panel. It can't do the things the Porsche system can but our electric rate isn't based on time or usage. It's a fixed .11 cents per kilowatt.

Maybe by then, the new Taycans will allow for two way flow through the chargeport and it can power the house if the grid is down long enough to deplete my EcoFlow.
this all makes perfect sense - Porsche's HEM is not available in NA and so far VW/Audi/Porsche have not announced V2G support or even hinted they understand it's a thing

most solar "systems" have battery management + some home management along with them…so what ever system you get will have some management capabilities - enphase solar bought clipper creek presumable to do some future integration between solar + batteries + EVSE + vehicles - otherwise there was no point in them buying the business…

your plan is a solid one - and if you're moving in less than 5 years solar is not cost effective in that time frame (although the next owner will love you for it - LOL).

In california once it all settle out break even is about 6-8 years in terms of electricity bill savings, and the panels have a 25 year warranty - so after year 8 the power your'e getting is "free" vs. what you'd pay if it was on your electricity bill…
 

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if you're being forced to replace a roof that's the perfect time to "add" solar - solar install is 50% roofing job, 30% wiring/hookup for the panels, 10% panel install, 10% paperwork for "approvals" from local power company - if you're touching a roof and not considering installing solar you really should - in some cases the roof job might be eligible for the solar tax credits as part of the overall "solar" job -making the roof job cost less due to tax benefits.
That is what I have been looking at doing.
 


ZenicaNC

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so far VW/Audi/Porsche have not announced V2G support or even hinted they understand it's a thing
That seems a contradiction, given the EU has a bigger push for connecting EVs to the grid. I'd think a German automaker would want to implement this, even if not in all markets. Tesla will continue to have an advantage until others realize how useful this is to the EV consumer.

Then again, Porsche should probably concentrate on their EV batteries first ;) though my VIN seems to be a luckyone in that it has managed to skip all of the battery recalls.
 

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Well, it may be clickbait, but when you’re waiting for a recovery truck for the 2nd time in as many months, it is clear Porsche have a problem. If they don’t resolve these HV issues, they will have no brand credibility….
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There is an issue no question. It’s also a large part of why Taycan has huge unsustainable depreciation. Unsustainable because much of the demand for new Taycans would have come from existing owners trading up to new models. However trading up for many Taycan owners will now be too expensive and depreciation issues threaten Porsche’s reputation for reliability dependability and engineering prowess. Ultimately Porsche can’t just be a fashion item it has to have great cars. The market will decide. The market may also in the future develop a solid state battery, CATL already has one. Imagine if you could upgrade your out of warranty battery for sensible non Porsche money ? At the moment this is too hard but in the future ?
 

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There is an issue no question. It’s also a large part of why Taycan has huge unsustainable depreciation. Unsustainable because much of the demand for new Taycans would have come from existing owners trading up to new models. However trading up for many Taycan owners will now be too expensive and depreciation issues threaten Porsche’s reputation for reliability dependability and engineering prowess. Ultimately Porsche can’t just be a fashion item it has to have great cars. The market will decide. The market may also in the future develop a solid state battery, CATL already has one. Imagine if you could upgrade your out of warranty battery for sensible non Porsche money ? At the moment this is too hard but in the future ?
Agreed. Depreciation is to be expected, and I would have traded up for another Taycan, but not now….
 

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Kind of like marrying a beautiful model that does everything you want, but she keeps cheating on you... :confused:
Well the problem with the Taycan is that she actually doesnt do everything you want when you want it. She’s more like a super model with a bad and unpredictable personality (like in real life).
 

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My dealer called today and scheduled visit for next monday 18th. There is a new “important and urgent” recall here in the EU for reprogramming if the battery manager related to the temperature control if the battery. Stated it would take up to a day.
 

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My car is absolutely amazing to drive, but there is always a nagging feeling that something will go wrong, and that is influencing the quality of my ownership experience significantly.
Reset your devices and dump all SM accounts and start fresh. Life is beautiful, enjoy your ride! ;)
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