I currently have 14 Tesla 24v battery modules (75kwh total) and I'm going to wire them in series for 312v nominal for an EV.
There's two ways I want to charge the battery pack:
1) From any standard J1772 public charge station (PlugShare, etc.) at a minimum of 6.6kw charge rate
2) This is a box-van type vehicle (like u-haul truck) with a flat roof with room for ~1800w of solar panels, so I want to rig those up and charge the battery with a Solar MPPT charge controller. They max out around 48 vdc output, so I have to find an efficient way to step that up to ~350vdc for the battery pack.
What I'm trying to figure out is:
- Choice of onboard J1772 charger (I'm considering the eMotorWerks SmartCharge-12000)
- Choice of BMS (I'm considering the Orion BMS)
- What is the most efficient way to convert 48vdc output from the Solar MPPT up to the ~350vdc that the battery pack should be charging at? Anything off-the-shelf for that purpose?
- I would prefer if the solar panels could be "always charging" regardless of whether or not the J1772 plug is charging the car as well, but I assume there is no battery charger that can manage an incoming AC feed and DC feed at the same time, and that using two chargers in parallel would affect their ability to read the pack voltage correctly. Should I just use relays/contactors to switch off the solar panels when plugged in to a public charger?
Thanks for the help, I'm trying to plan out the most simple way to approach this.
There's two ways I want to charge the battery pack:
1) From any standard J1772 public charge station (PlugShare, etc.) at a minimum of 6.6kw charge rate
2) This is a box-van type vehicle (like u-haul truck) with a flat roof with room for ~1800w of solar panels, so I want to rig those up and charge the battery with a Solar MPPT charge controller. They max out around 48 vdc output, so I have to find an efficient way to step that up to ~350vdc for the battery pack.
What I'm trying to figure out is:
- Choice of onboard J1772 charger (I'm considering the eMotorWerks SmartCharge-12000)
- Choice of BMS (I'm considering the Orion BMS)
- What is the most efficient way to convert 48vdc output from the Solar MPPT up to the ~350vdc that the battery pack should be charging at? Anything off-the-shelf for that purpose?
- I would prefer if the solar panels could be "always charging" regardless of whether or not the J1772 plug is charging the car as well, but I assume there is no battery charger that can manage an incoming AC feed and DC feed at the same time, and that using two chargers in parallel would affect their ability to read the pack voltage correctly. Should I just use relays/contactors to switch off the solar panels when plugged in to a public charger?
Thanks for the help, I'm trying to plan out the most simple way to approach this.