Solar battery and V2L

[AmperaE]

@Everest
I just checked the voltage of the v2l. It's 217V ac. The grid reading is 248V. Is that difference within tolerances?

Suppose I'm switching to an isolated charger, will my batteries (2x 5.3kW Solax T-BAT-SYS-LV-D53 battterypack). allow a second dc input? Will that not interfere with the BMS etc.

 

[siteguru]

217V is right near the bottom of the -6% tolerance for a nominal 230V supply. (-6% / +10% = 216.2V to 253V)

 

[Everest]

@Everest
I just checked the voltage of the v2l. It's 217V ac. The grid reading is 248V. Is that difference within tolerances?

Yes it is (just), as @siteguru confirmed

Suppose I'm switching to an isolated charger, will my batteries (2x 5.3kW Solax T-BAT-SYS-LV-D53 battterypack). allow a second dc input? Will that not interfere with the BMS etc.

If galvanically isolated, it is fine - that's what Chargeverters and similar devices are used for. But, you will need to consider the maximum charge current and fusing aspects, as I mentioned in post #8 in this thread..
things that @Everest said about charging batteries...