3 weeks ago, I had similar project for US client. It was hybrid powering system involving 7A battery, 900W gasoline generator, 12kW DC motor. I had designed autonomous battery management system having LVP, HVP and used voltage sensor, current sensor, Arduino and some relays. Project was verified via testing.
I think your project is very similar in many cases.
I am an expert in circuit design, PCB layout and firmware programming. I have strong experience in power electronics, battery management and power bank design is my strong point. My former projects in power electronics are as below.
+ 10kW grid tie solar power inverter
+ 3kW CVCF(SMPS)
+ 10kW voltage stabilizer(transformer type)
+ 7kW welding machine power supply
+ 1kW battery charger
+ 48V/50A DC power supply
...
I will share previous design files via chat since I can not upload any file on this bid.
Looking forward to having opportunity to discuss on your project in detail.
Thank you.