Didn't we just have this question?
A) Charge Tank is designed for a larger battery. It won't be plug-and-play.
A1) The SR/F uses different connectors.
A2) The programming may be different.
A3) It's not a cheap option.
B) The quick chargers can be stacked like that, yes.
B1) https://zeromanual.com/wiki/Zero_Quick_Charger
B2) It would be heavy.
B3) You have to manage load balancing and cooling yourself.
The X and F platforms use different electronics that may not play nice with each other. Third-party chargers can be used, though you will have to manage the charger station communication protocols yourself.
-Crissa
Yes, we did have this discussion. There are links to third-party chargers in here, I think. https://www.electricmotorcycleforum.com/boards/index.php?topic=9202.0
The question does bring up that it would be cool to have such an augment as a 3 or 7 kw tail charger for the X and S platforms, but who would buy it aside from you, me, and probably Brian?
Hey Crissa

Thanks for your quick reply, i have trawled the forum for the last 25 pages couldn't see anyone asking so my apologies if i missed it. i have read the type 2 thread but didnt seem to be anything in there of any substance.
I get the charge tank is based on a 14.4kwh pack but without looking into the voltage etc im gonna assume its still 116v just double the capacity? which would mean it would still work if it was canbus compatible ? the attraction is its all in one package im more than happy to go for aftermarket if i get get a 6kw single unit, im not keen stacking chargers as its extra weight unnecessarily in my eyes.
Connectors and cooling etc would be no problem im an Electrician

with comercial water-cooling experience so i may be temted to go down this route when i find a charger that will do the job.
the charger parameters are 116v and must be switch mode i think i read?
cheers
Ben