I have very recently purchased a Nissan Leaf. The car has an on-board charger (100-240V rated) and uses a EVSE (Electric Vehicle Supply Equipment) which connects the car to the household supply. The EVSE signals to the car the available capacity (e.g. 8A or 15A) and passes through the mains power. The dealer has supplied a NZ certified EVSE which charges at 7A but I am trying to work out whether the Nissan Japanese unit which is rated for 200V 15A might be safe to use as charge times are an issue.
There is a separate thread Nissan Leaf and EV Imports - any experience with them? which has some detail with caution about using these 200V devices in NZ and questioning the modifications that are done by some dealers. The Gen1 cars had a different unit and there is a linked post in a Sri Lanka forum what shows how to change out the transformer.
I have a Gen2 which has a different EVSE with the board potted:
Many of the components seem rated for 250V although the transformer would be over voltage. There are 12V relays that might then get 14+V but these have an over voltage allowance on the coil of +170% so not too worried there. However, there seem to be MOVs that are confusing to me. They have this label:
From what I tell from datasheets K175 this means 175V operation and the next model up may be 230V so perhaps Panasonic choosing a 175V for 200V operation makes sense? On one datasheet the K175 has a max clamping voltage of 455V while the K230 is 595V. Both seem to have headroom to 240VAC peak of 339V but is the K175 too marginal for NZ operation?
These EVSEs are quite expensive and the ones that come with the car are surplus so would be good to use them but with the potting I don't think components here can be modified. Any suggestions or comments welcomed and appreciated. Thanks.