Solar system tripping out mains.

[BruceB]

they may be fine, but if they aren't tested, certified or approved for AC so you can't use them.

I think you are being over-prescriptive moggy.
For example Batt solar cables have an ac voltage rating
FG21M21 PV20 (1500 V cc) Extended Lifetime Single

 

[moggy1968]

doesn't have to be T&E, you can use any suitable AC rated cable. he's talking nonsense!On his argument what would you use for a shower, after all, someone might tap into it to use for a cooker! we use flex and twin and earth depending on which would be most suitable. We use standard white flex, but in 4mm or arctic cable in blue. when we use T&E it is always 4mm or 6mm.
Arctic linking from inverter to isolator, then T&E in conduit (the conduit is straight, just perspective makes it look on the wonk!!)
Flex from inverter to isolator then T&E in conduit out

 

[moggy1968]

I think you are being over-prescriptive moggy.
For example Batt solar cables have an ac voltage rating
FG21M21 PV20 (1500 V cc) Extended Lifetime Single

as long as it's tested, rated and approved ok, I did say as far as I am aware!
If it can be used then it avoids the problem of inserting cable into the meter without leaving inner insulation showing I suppose! we usually use something like a gewis box or the isolator to tidy things up.