Ok, updating this with details from our installation.
Panels: 16x 415W panels with a 6kW Inverter. Max effect approx 6.64kW. Total cost (including tax rebate for installation of green tech) 81K SEK, so about 12.1 k SEK per kW, roughly equivalent to 916UKP/kW.
Battery: 1x 5kW base unit (Huawei) with Luna2000 control module, plus 1 x 5kW (total of 10kW). Total cost, including in tax rebate for installation of green tech) approx 57k SEK, so roughly 4.4 kUKP.
Total installation is therefore about 138k SEK or about 10k.5k UKP. It’s a big chunk of cash, but el is only going to get more expensive and it does mean we are a little more self sufficient.
The green discount is much more heavily focussed on the battery (it is effectively half price with that factored in) which is the reason we stretched to 10kW. We’ll see if the panels actually fill that in summer with, given the S/SW orientation of the roof, should be possible.