[RE-wrenches] Prepping for Bi-directional Charging with Enphase

[Jason Szumlanski]

My understanding is that the EV charger will be compatible with the SC3 but not
the SC2. The white paper
[https://mailtrack.io/l/90667185047385cae6914b7225cd28f5ef001880?url=https%3A%2F%2Fenphase.com%2Fdownload%2Fbidirectional-ev-charger-white-paper&u=1613865&signature=feaaf6fd1c1cbfdd]
says that the system will require the CAN bus protocol, and I don't think the
SC2 can be upgraded to use that wired protocol. The IQ Combiner 3 or IQ Combiner
4 should be usable with a Communications Kit (COMMS-KIT-2). However, When I am
upgrading people to IQ Battery 5P where they have an IQ Combiner 4 or prior, I
just upgrade them to an IQ Combiner 5C because by the time you buy the
communication adapter and cell modem, it's cheaper and easier to just swap out
the combiner in most cases. And that leaves me an older combiner to have as a
spare to sell as a used replacement down the line.


I think you are safe with the SC3 for bi-directional charging compatibility. I
am not clear on whether a SC3G can be used. But I think the bi-directional
chargers will use one of the DER breaker slots, which means you will need a SC3,
not a SC3G if you also have 5P batteries. That means you will be limited to four
5P batteries without PCS or 8 batteries with PCS.

Jason Szumlanski
Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956
Florida Certified Electrical Contractor EC13013208


On Wed, Apr 3, 2024 at 7:57 AM Mac Lewis via RE-wrenches
<re-wrenches at lists.re-wrenches.org> wrote:

> Hello Wrenches,
> 
> 
> I have a customer who is an early adopter that is ready to add some Enphase 5P
> to his IQ 8 system.  Doing this will require updating his current Sunlight
> backup IQ System Controller 2, to the latest IQ System Controller 3 to be able
> to work with the 5P.  He is OK with this upgrade, but understandably, he would
> like some assurance that this upgraded system controller will be compatible
> with the upcoming bi-directional charger.  
> 
> 
> I know nothing is solid for an un-released product, however, I would
> appreciate any insight or good Enphase contacts that may be able to give good,
> informed advice.  Any help would be greatly appreciated.
> Thanks!
> 
> 
> --
> 
> 
> 
> 
> 
> 
> 
> Mac Lewis
> 
> 
> 
> "Yo solo sé que no sé nada." -Sócrates
> 
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