JUA Solar

That's great news indeed. I hope they can parallel more than two units or make larger units in future. I installed the unit in May this year, and I found it quite a great product. There are few improvement issues to address such as that meter installation manual, which is quite useless, also that the inverter won't work without the meter. They are also not good in explaining the inverter settings. In overall it's a great device quick and easy to install. 

how do I enter the competition

Hi Kortsluiting
I’m not familiar with the batteries but I see that they mention monitoring via an app that connects via Bluetooth to the battery. I would check the battery SOC using that app instead of the WatchTower app to be certain that you getting the correct SOC.
 

A simple video to demonstrate the relationship between the basic values we are faced with everyday.
 
 

This is the said fuse for the MAX 7.2kW inverter and it sits in a place that is not accessible without breaking the warranty sticker on the side. 
I have installed a few MKS4's but I can't recall if it has the older design with the push in trip switch of the Max type design.

You should consider adding Pylontech to your batery list.