I bought this Zivan NG3 charger from a private seller with the clear intention of using both 110 and 220VAC to charge the batteries. This allows the flexibility to use either a normal 110 or 220 volt household socket, or a 220 volt public charger. I was under the assumption that the Zivan could do this until I read the spec sticker on the face, where it states the charger input is only rated for 115VAC at 23 amps max. Even though it was a good deal, it was still a big chunk of change to drop on a charger that doesn’t fit my plans. After calling Zivan/Elcon in Sacramento, I learned that the NG3 can be factory configured to accept either 110 or 220VAC, but not both. The seller would not accept a return, so I posted the charger to eBay, which is still active as of this update. Hopefully, it will be purchased by somebody who has no intention of charging with other than 110 volts.
It happens that Zivan is a very reputable Italian charger brand that is distributed and serviced by Elcon in the US. After speaking with an Elcon representative who listened to my plans and determined my needs, he suggested their dual-voltage charger PFC 2500. It’s a sealed weather-resistant unit, which accepts both 110 and 220VAC. More importantly, it’s factory configured by Elcon to mate to the exact battery pack in the car, per voltage and amp hour rating, and is also programmed with a custom charging profile. It doesn’t hurt that it’s 50 bucks less than the used Zivan charger, but what really swayed me was the glowing review by Dimitri at CleanPowerAuto, who makes and sells the MiniBMS battery management system I will be using.