openinverter forum

So, for completeness sake I'll repeat the Polo conversion here, the mother of all "Another Homebrew AC controller" conversions

• 152 LFP040AH in series for an idle voltage of ~500V
• 18.5kW Industrial ACIM (Lenze MFEMAXX132-22C1C)
• Homebrew AC controller (using 1200V, 400A IGBTs)
• Homebrew BMS
• Inverter Charging
• LiFePo4 System battery charged by an ebay AC/DC (no DC/DC converter)
• Audi vacuum pump (8E0927317) for braking with Audi pressure sensor (036906051G) and homebrew control electronics (some resistors, an NPN transistor and a relay)
• Heating element from a 230Vac heater with a custom solid state relay
• 800V, 16mm² "solar cable" for the DC connections
• 4x6mm² for the motor connection
• Lots of wood, aluminum and fibreglass

I have kept as many original components as possible. For example the original throttle had a pot already, so I could use that. I added another rear defroster switch for cruise control and a pot that controls max regen torque.
I use the existing temperature and fuel gauge as well as the warning lights. Reverse gear is selected with the transmission.

Kilometers driven to date: 25.000km