Not really sure what he’s on about, the RCD are a different manufacture to the consumer unit, they also have no name on them, the ev charger has its own consumer unit and RCD. The original electrician who carried out the installation was a bit sloppy, I picked him up on a few occasions, we did have issues with inverter, the wiring to the battery/inverter failed, another electron was sent out to repair the bodge, to date the system work 100%. I know the local electron he is an honest guy with an excellent reputation.
Just to get it in my head, your consumer unit has 2 RCD’s with no name and your EV charger is not supplied from the house consumer unit, rather is on its own supply with RCD protected consumer unit?
I am wondering if by 2 way, he is refering to a bidirectional RCD for the PV & battery, of which your system predatate the requirement of for bidirectional protection seen in Amendment 3 of BS 7671 2024 and therefore is not mandatory to upgrade, as mention previous and does that mean if the local electrician visits in a few years, he will want your installation to meet the latest amendments whatever they be even though your system predates it. I’m just being honest with you rather than condescending to anyone!
Has he give you a price for the work, as a consumer unit won’t be cheap and how do you feel from what he has told you given he is trusted?
From my point of view, it is somewhat concerning there is no manufacturers name on the RCD, is it cause for concern to change the board though if it passes relavent RCD tests and would a code 3 (explained above) be more appropiate. However, if you feel you want to bring it up to the latest regulations, even your installations predate these regulations, have the money to do so, yes by all means.
As explained under surge protection, there is a possible risk alhough slim under (1: Result in serious injury to, or loss of, human life), I would recommend SPD protection to be afforded to the EV charger, even though instalation predated the requirement. If there is no room for SPD protection in the charger consumr unit, an isolator c/w SPD in the supply line, would be the cheaper option.
Inverter SPD, it is recommended the manufacturer specification are consulted for inbuilt AC / DC SPD protection prior to deciding whether to proceed with external SPD protection (though not mandatory as the installation predates the requirement from memory)