Went for it this afternoon and the 3 panels are in and working.
Overcast here
Solaredge 16 panel array is putting out 800W
Victron 15 panel array is putting out 700W
Away to tidy up, knackered but very

.
Found one melted MC4 connector today, will change out tomorrow.
Turns out an old tit like me CAN get 400W panels on shoulder, up a ladder then up a bungalow roof. Getting too old for this...
Looking forward to seeing it all cranking away tomorrow in the clear spells, more EV power and it was great to see that fabled 1.5kW be the figure when I switched it back on. As I said before, you can do a lot with small amounts of power generated over long periods. While up there it turns out that there is a possible space for three more panels but in all honesty I don't think i need them...