Lowest voltages possible with SDU

[RelikEV]

We've just built a VW T2 with the SDU and open inverter and i'm impressed by the open inverter, although it's a bit more complicated than using the T2C, it's very good so hats off to the community, awesome stuff.

But one thing i'm curious about is the lowest voltages it can handle? what have people been successful in using?

Our pack is 350v nom 60KWH in this conversion but if i wanted to use it in a smaller car without much space, what can i get away with using whilst still being drivable? and still with a nice bit of power?

[tom91]

The T2C is for one purpose only and meant to be for people uncomfortable with tuning and tweaking parameters. Open Inverter gives you access to everything, including things that will break your drive unit.

I would not go a lot lower in voltage range. The motor starts to be difficult to setup and dial in leading to low power output.

[ianlighting]

We've just built a VW T2 with the SDU and open inverter and i'm impressed by the open inverter, although it's a bit more complicated than using the T2C, it's very good so hats off to the community, awesome stuff.

But one thing i'm curious about is the lowest voltages it can handle? what have people been successful in using?

Our pack is 350v nom 60KWH in this conversion but if i wanted to use it in a smaller car without much space, what can i get away with using whilst still being drivable? and still with a nice bit of power?

Can you share a few photos of your build? Or link to another place where we can read about it? I’m interested in the space you used for batteries since I’ve just done a 60kWh VW T2 myself.

[Bratitude]

If you have less space and want a smaller pack, there’s no reason to go lower voltage. Plenty of cell options for a hv pack with a smaller capacity.

[Proton]

When I was testing I used about 40v. Solar panel on the car and super capacitors. The car was moving for few seconds and then stopping until the solar panel charged again the supercapacitors.