Question for experts - Advice on how to do it

DIY
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1

Good evening everyone,
I am here to ask for advice on what solution to adopt to improve my system, I have two or three ideas that I would like to share but I am also open to any proposals.
I have a 6kW PV system with an inverter and 10kWh Huawei batteries.
I am not satisfied with the performance because I have problems with the grid operator, in the sense that when the batteries are charged, within two hours, the system feeds into the grid but it is limited by the fact that the voltage of the grid increases. I have already contacted them and they have recognized the problem, but I do not know if and when they will solve it.
I therefore wanted to do something to make better use of all the energy that I currently waste, also considering the fact that I have an electric car to charge and therefore I would like, at the very least, to increase the capacity of my batteries.
The solutions that I have thought of:

  • The simplest, increase the Huawei batteries. Simple but expensive work.
  • Solution 2: Eliminate everything and sell the Huawei equipment, with that money take MPPT, multiplus-II inverter and Manyi 30kWh battery pack. I basically go off-grid keeping the grid only as a backup in case the batteries run out.
  • Solution 3: Integrate, upstream or downstream of the Huawei inverter, a multiplus-II inverter and Manyi 30kWh battery pack, to have a total of 40 kWh of storage
    Since I’m studying the solutions, I wanted to talk to the most experienced to help me understand which path to take.
    Thanks to anyone who wants to answer!
    Greetings,
    Manuel
2

You could buy a victron ev charger and just charge with surplus PV.

If your inverter is large enough to take the load of the EV, with you relying on just excess PV you won’t need to buy anything else. (Unless you plan on charging during the evening?)

3

Hi, thanks for the reply.
I can charge only during the weekend when the sun is present, for the other days I’m at work, so I have the possibility to charge only in the evening or during the night.
For this reason I would to increase my batteries capacity.