Thanks
What this is telling me (correct me if I am wrong) is that:
i. my ISP sending me extra network extenders is not really helping, indeed it could be exacerbating my connectivity problems.
ii. this sort of system for provision of Wi-Fi coverage has fundamental flaws
Looking at my IotaWatt log it’s showing multiple W-Fi channels. I can see in last few days that it has connected, at times, to channels, 1, 2, 3, 4, 5, 6, 7 and 11.
I’ve no idea why so many different channels as I don’t have that many network devices. Anything other than channels 1, 6, 11 would seem to lack sufficient bandwidth separation.
Think I’ll remove one of the extenders. Perhaps this is also what has caused Wi-Fi connectivity issues with my Fronius inverter and also my Solar Assistant Raspberry Pi (for the off-grid inverter monitoring/management). I eventually gave up and connected an ethernet cable to both.