[kevinjclancy]

I am looking at using a 12 volt wet cell motor cycle battery - 12AH

I see that all of the EV's have full size 12 volt batteries but I don't have the space and I don't want the weight -

Can anyone tell me why if at all this is a bad idea?

Also another important question - the DC to DC converter is supposed to keep the 12 volt battery charged up, I get that but what is stopping the battery from getting over-charged????

 

[kevinjclancy]

Hey thanks for your input

So basically your answer is base on expected damage due to a sudden failure of the DC to DC converter -

I don't get the bit about the arcing - When I shut the car off by removing the key the DC to DC cuts all power to the relays anyway ?

 

[kevinjclancy]

oddly enough the rules say that you are not required to have any 12 volt battery ????

"a separate battery or electrical supply management system that provides
priority to the power supply needs of the vehicle’s safety equipment,
such as lighting equipment, brakes, and windscreen wipers;"

of course I will have a battery and I will probably use a small car battery

https://www.lvvta.org.nz/documents/standards/LVVTA_STD_Electric_and_Hybrid_Vehicles.pdf

 

[kevinjclancy]

Duncan please call me - or text
i would love to swap ideas and speak to a fellow kiwi EV builder -

021 2522510