[tenthousandclowns]

I'll bet all that is possible... but probably more expensive than you want... Last I heard the orion BMS can take care of the chademo, not sure about CCS fast charging... I bet you would have to replace all the batteries instead of adding more since my guess would be that you would want them all to match. Probably a $10k+ project. I too wish there were more options for roomier vehicles...

 

[Duncan]

Hi Eluv
How about getting some contactors so that you can run an "either/or" system - then you could get something like a Chevy Volt pack and run either the existing battery OR the volt pack (reconfigured for your voltage)

 

[eluv]

Is using additional batteries really as simple as adding a contactor? Would I need a second charger/bms? This seams like a reasonable solution.

 

[Duncan]

Is using additional batteries really as simple as adding a contactor? Would I need a second charger/bms? This seams like a reasonable solution.

If you have a second pack the same voltage as the first pack then you can

(1) simply put the two together in parallel - then use the same charger
This could lead to problems if there is a fault with one pack

(2) set up two different packs and keep them seperate - you will be able to use the same charger but you will need contactors - PLURAL to operate them separately
Four for the charger and four heavy ones for the batteries

If the packs are different voltages then you will need two chargers - one for each pack

I'm not a great fan of BMS's - I use a simple Lee Hart Batt Bridge to see if I have a problem

 

[tenthousandclowns]

Oh.. I forgot about the Rav4 ev.. that may suit your needs and be already existing.