[CarterJohnson]

96v BMS and Charging system - Need Help / Advice

This is for a Electric Boat - More info on this thread.

96v Solar Cabin Cruiser Project - Full...

Starting this thread to document the full Solar Boat Conversion Project. Always looking for good advice. The Concept 1) I will eventually be converting a nice 40 Cat or displacement Hull to Electric. Needed a project boat to experiment on first. 2) I found this 23 foot boat for $1800 +...

www.diyelectriccar.com

As all my past experience has been with House Solar, I have been gravitating to similar equipment, I am quickly learning though there is an entirely new world in the EV space better suited.

1. There will be 85kWh of LifePo4 Batteries. 96 cells
2. I was gravitating to 3 32s 96v Batteries that would be ran in parallel. Would allow 3x redundant. 2 packs could be taken off line if needed. (THIS CAN BE CHANGED)
3. The EV will have a standard Split Phase 50amp 240vac Shore inlet as power source.
   1. NOTE: Depending on where parked. Shore power may only offer 30amp 120v or 15amp 120v service.
   2. Charger needs the ability to work with both.

This is where I fear my Solar experience is leading me down the wrong path. HELP!!!

My knee jerk was Each 32s Battery would have its own 32s 200amp BMS. The 3 packs in parallel would then be hooked up to a 96v Inverter/Charger. This is current Plan.

• UART RS485 communication BT 3s-32s 10A-200A BMS used for li ion lifepo4 LTO battery cells
  • Uart Rs485 Communication Bt 3s-32s 10a-200a Bms Used For Li Ion Lifepo4 Lto Battery Cells - Buy 3s 4s 5s 7s 8s 10s 12s 13s 15s 10a 20a 30a 40a Uart Rs485 Communication Bluetooth Bms Use For Li Ion Lifepo4 Lto Battery Cells,16s 17s 20s 22s 25s 30s 32s 35s 40s 60a 70a 80a 90a 100a 120a 150a 200a Bms Li Ion Lifepo4 Lto Battery Cells For Ev Rv Motorhome,Uart Rs485 Communication Bluetooth Bms Use For Li Ion Lifepo4 Lto Battery Cells For Ebike Motor Car Boat Marine Solar System Product on Alibaba.com

• 12v 24V 48V 96V dc to 220V 110V ac 1kw 2kw 3kw 4kw 5kw 6kw 7kw solar inverter with charger
  • 12v 24v 48v 96v Dc To 220v 110v Ac 1kw 2kw 3kw 4kw 5kw 6kw 7kw Solar Inverter With Charger - Buy 1kw Solar Inverter,Solar Inverter,1kw Inverter Product on Alibaba.com

Concerns - Would love your advice

• These are unproven likely not very robust parts made for Solar setups
• I feel like there are robust proven EV solutions for 96v
• Will not utilize the full 50amp 240vac Shore hookup - will max out at ~2500 ish Watts charging

Would love to get feedback on 96v BMS / Charging setups

• Sadly, I do not even know where to begin help me!!!
• Basic research suggest there are systems where the charger talks to each Battery BMS.
  • would this work with 3 separate packs in parallel?
• How would the charger hook up to a 50amp 240v split phase breaker box vs EV Charging station inlet
• Would the charger be able to handle power if it was only 120v. (30amp shore power or 15amp shore power) how would it know to step down?
• See such great potential here and do not want to try to re-invent the wheel as this 96v setup must be basic in the EV world

Thanks