eyedrop wrote:Suppose I get the EVSE upgrade and want to charge using NEMA 14-50 at the RV parks. About how much range will I add per hour?

For example, Ive seen people say level 1 charging will add roughly 4-5 miles of range per hour.

I often use a Blink charger that is rated at L2, 4.7Kwh. Would the 14-50 be about on par with that? What is the Kwh rating on it?

To give you the answer you want, first we need to know your Leaf's on-board charger capacity. If you only have the J1772 port, then you have the 3.3kw charger. If you also have the DCFC port, then you have the 6kw charger.

If you only have the 3.3kw charger then anything greater than a 16amp, 240v EVSE will not give you any faster charging speed.

If you have the DCFC charging capability, then you need a 30a, 240v EVSE to utilize the full charging speed. This gives you approximately 25 miles each hour. To run a 30a EVSE you need a 40amp circuit breaker. Anything less than a 30a EVSE will slow down the charging speed. I think the EVSE upgrade is limited to 12a, 240v. The least expensive option is the DYI Open source EVSE. There are members on this board that will put it together for you for a reasonable price.

If you want to future proof your installation, in case you end up getting a Tesla Model 3, or even future a Leaf with faster charge speed, then I would suggest having it wired with 2AWG wire to handle up to 100amps.

A NEMA 14-50 is a plug outlet for a 240v, 50amp circuit. This will support any EVSE up to 40amps. 40a * 240v = 9.6kw. This is the current limit of the single on-board charger for the Tesla. The Tesla dual charger can handle up to 72amps * 240v = 17.3kw.

The charging speed of the L3 DCFC can be as high as about 125 miles each hour, so only need to be plugged in for about 20 minutes. Some of the DCFC chargers are limited to a lower amps, so give a slower charge, but still much faster than the 25 miles each hour for the 30 amp EVSE.

The charging speed of the Tesla Supercharger is about 170 miles in 30 minutes, VERY much faster than the L3 DCFC.

I hope this helps you to understand charging speeds better.