AJBester

Here is a interesting writeup on East West arrays and the conditions.
https://www.solarquotes.com.au/blog/an-eastwest-spit-of-solar-panels-on-a-single-string-can-work-well/

You get almost full Voc even in the shade. As long as the sun is above the horizon. 

Weigh up the costs of lower wattage panels at high Voc vs higher wattage but slightly lower Voc.
i.e. take these 555W panels with Voc of 45V
if you were to get 4 of these, you will be well on your way and have 2kWp plus. At this price it will be hard to justify lower wattage with higher voltage which will probably cost you the same.
https://www.inverter-warehouse.co.za/products/jinko-solar-panel-tiger-555w-mono-facial

Look for high voltage panels and expect to pay a premuim.
https://www.sustainable.co.za/collections/rigid-solar-panels/products/enersol-395hv-395w-high-voltage-solar-panel
https://www.sustainable.co.za/collections/rigid-solar-panels/products/renewsys-prime-275w-high-voltage-solar-panel

Hi @Chris_S, 
Pleeeeeese, as I requested multiple times before, let’s keep this thread for reporting the latest available versions only, as this is not done on the manufacturer’s website. Let’s not turn it into full blown discussion about issues and bug fixes. 

Interesting video. I think that the Sunsynk's touchscreen interface is far better than the Sol-Ark app though, but maybe I am biased, would love to see the new Sunsynk dongle app. Hint-hint @Tariq
So let me try to get this right, second time around, edits in green red, version 1.1 1.2:
The inverter will use any source at its disposal to keep essentials, or "Load" alive, within constraints set regarding the battery in the System Mode screen, Work Mode 1 and 2 tabs; The whole System Mode screen revolves around the battery: The inverter will draw from, or charge battery to the desired SoC, at the desired time: from PV (or Grid, or Gen if ticked, and if both ticked, then in that order. Note that Grid and Gen cannot be used simultaneously, it's either one or the other) drawing from the battery, or charging the battery at the rate (W) specified in the stated power level; If Load Priority is ticked, it will use PV at the specified rate (W) to first service essential loads; and if any PV is left over, it will use the left-over PV to charge the battery (even if the battery SoC is higher than what is set); if PV is too little, or the rate (W) set too low to service essential loads, then it will draw what it needs from Grid / Battery / Gen  to supplement PV; If load priority is unticked: It will use all PV to charge battery, at the specified rate (W) (and will continue to charge past the desired SoC which is set on the timer) If Grid or Gen or both is ticked, it will use Grid or Gen (or if both ticked, then in that order) to achieve the desired SoC of the battery. Note that Grid and Gen cannot be used simultaneously, it's either one or the other; If the desired SoC is achieved for the timeslot, unlike PV it will stop using Grid / Gen to charge the battery. It does not like to waste PV. Note that battery charge / discharge rates in the timer are overridden by the values in the Battery Setup screen, Batt Type, Batt Charge and Shut Down tabs. I hope to get this right in order to help newbies, I know that I spent 3 days trying to figure it out through trial and error 🙄 So please double check me, any edits are welcome.

The latest version for that model (make sure it's not a King with the same version number series!) is 71.86, right here on this forum:
 
 

BN_Impi-settings_201303 2019 04 01.pdf
These are the settings I got from Blue Nova in 2019, they may be out of date but worth a shot!

The .7z file is like a zip file, it has all the files you need, including the reflash tool.
For the MKS II, there is no U2. U2 is for either removable display firmware, or for the  separate Solar Charge Controller firmware. Your model has no removable display, and the SCC is done my the main DSP and its U1 firmware.

Thanks for the feedback all.
Will take into action tomorrow.
Sincerely
Jason