Charging electric vehicles: Two questions

[Mitch Davis]

Hello hacking brothers and sisters,

On Tue, 19 Aug 2025 at 20:33, danfei <df4v...@gmail.com> wrote:

惊悚的是失踪人口突然开口🥶

Maybe I am the silent missing one!  Well I'll fix that.

Is anyone here into power electronics?  I am starting to teach myself.  

I want to get into power electronics suitable for going "off-grid".  Partly for myself, and partly because there's a large market here for power management systems in RVs, caravans, and other leisure vehicles.

 I'm looking at three particular problems.

The first is the bucking of solar input under 80V DC to about 55V or so to charge a nominal 48V battery system, often using an algorithm called "MPPT" to get the most out of solar panels.

The second is inversion of nominal 48V from batteries to 230V AC mains at a few kW (continuous).

The third is how I might engage my EV's battery (I have a GWM Ora/长城欧拉) in the home energy picture (V2H, vehicle to home, bidirectional charging, charge it from solar in the daytime, use the power in your home at night).

For the first problem, I'm looking at this open source project, a 1kW solar-to-battery buck converter: 

  https://github.com/fl4p/Fugu2

based on this earlier project:

  https://www.instructables.com/DIY-1kW-MPPT-Solar-Charge-Controller/

My question: Can anyone suggest suitable MOSFETs/gate drivers?  Brothers, I would love some suggestions for parts on LCSC / 立创商城 .

Another question: At the physical level, an EV (电动汽车) and an EV charging station talk Homeplug "Green Phy" to each other.  Then over that, they talk TCP, SSL and finally ISO 15118.

Some people are talking to their EV cars with the TP-Link TL-PA4010, which uses the Qualcomm Atheros QCA7420 chip.  This is a Western chip.

Can anyone tell me (do a net search) which chip Chinese EV charger companies are using to Green Phy to EVs?

Mitch.