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Tesla front sdu max battery voltage!?
Posted: Sat Nov 20, 2021 3:01 am
by thetdiguy
As the title states i was wondering how much voltage one would take reliably i have 12 A123 lifepo4 40v 12s modules i was planning 10 in series but at max charge voltage it would be 432v versus 388v for 9 packs would is take the 432 on the higher end ?
Re: Tesla front sdu max battery voltage!?
Posted: Sat Nov 20, 2021 3:03 am
by thetdiguy
Re: Tesla front sdu max battery voltage!?
Posted: Sat Nov 20, 2021 7:43 pm
by EV_Builder
It's about the margin in regards to the fets in the inverter. If I'm correct they are 600Volts. So I think you can do that but I would monitor the battery voltage closely and ramp Regen accordingly with battery SoC etc.
Re: Tesla front sdu max battery voltage!?
Posted: Sat Nov 20, 2021 9:32 pm
by thetdiguy
I guess is it worth taking the risk for the extra .75 kwh module
Re: Tesla front sdu max battery voltage!?
Posted: Thu Jul 14, 2022 9:07 pm
by EV_Builder
actually the issue is the bus capacitor that one is spec'd lower. In another thread this question came along too.
Re: Tesla front sdu max battery voltage!?
Posted: Fri Jul 15, 2022 4:03 am
by remy_martian
The Model 3 caps are rated at 430VDC. Not sure what SDU is.
I would not go with 10 modules unless someone (you have the unit - have a look) can confirm the caps are rated to 500VDC.
Re: Tesla front sdu max battery voltage!?
Posted: Fri Jul 15, 2022 7:07 am
by Bratitude
You don’t have to charge the pack up to pack voltage…
Re: Tesla front sdu max battery voltage!?
Posted: Tue Jul 19, 2022 3:15 pm
by EV_Builder
