Well there we go. It seems that the most straightforward, easiest and cheapest option is fit sma inverter.
Aurora Power One have the exact same shading functionality and dual MPPT set up, but for a fair bit less money.
Attached is one we installed earlier, with hard shading from next door house coming across the array from 5.40pm. full scan function set to 5 minute intervals on Aurora power one 3.6 Out-D, as the performance at 15 minute intervals was terrible, and I've approximated the shaded and unshaded production lines for comparison. The shading actually happens almost exactly as per our model, as does the performance.
btw can I ask, how did you end up choosing this company to install your system? This sort of situation is the entire reason that this recent race to the bottom with solar is a really bad idea,along with the get 3 quotes mantra - getting 3 quotes is all very well if people go with the best company, but far too often they're just going with the cheapest and assuming that solar is just simple technology / ignoring the benefits of going with an experienced well trained installer even if it might cost a little extra up front.... or often actually, people end up buying from some smarmy sales person who knows nothing about solar, then wondering why it doesn't all work out well for them.
Let this thread be a warning to others, if you buy from a company who doesn't know what they're doing, then it can all go very badly wrong for you especially where there is any shading involved.
I do hope you get this sorted, but at the same time, I can't help but feel that maybe you contributed to this by choosing a company that didn't know what they're doing for some reason, then expecting the experienced installers on here to assist you for free down the line when it's all gone wrong - the same experienced installers who're being undercut by the sorts of idiots you got to install for you.
Apologies if you think this is out of order, but I have had an ale and am going to get on my soapbox for a minute, as this is a serious issue for the industry and our customers and potential customers.
It's an example of why cheap / big but know nothing companies aren't always best. We recently took someone on who'd been British Gas trained for solar and worked for them for 18 months, then worked for another company, so total 2.5 years solar experience, mainly with SMA.... he'd never been shown how to set up the optitrac global peak shading function on their inverters, or even told that it existed.
As a counter point to that, we trained our guys in it within a few days of it being released, and bought laptops specifically for them to use to set this up, and went back to upgrade a lot of customers inverters with the updated firmware within weeks, which really is the difference between a highly specialist company, and some fly by night, or big company that's decided to move into solar.
If you have shading, then please find a company that really knows their stuff to deal with, otherwise this sort of situation will very likely be the result. Solar is not simple, it can not be learnt properly via a 3 day course led by trainers who've only done a couple of installs themselves, or have competence properly assessed by assessors who've only done 5 installers themselves.... unfortunately that makes up much of the industry, and is all the MCS requires, so as a customer if you have a complex install you really need to make a judgement about whether the installer seems to know what they're talking about or not.
tbh this is more of an indictment of the industry regulators than anything, unfortunately the public get misled into thinking that all MCS companies must know what they're doing, when the reality is very different - MCS is no guarantee of quality or competence, it's basically a minimum standard, and you're left to assess for yourself whether the company actually knows their stuff beyond that bare minimum standard.
I hope you get this sorted though, as far as it's possible to be sorted.
