RobN

NE facing panels make more sense than NW facing panels, so I would have thought directly over the X.
E facing panels catch the morning sun and start charging batteries early, when most needed; also more efficient as its cooler.
My 2 pennies worth and also no expert in any way

Dear @zathras
I am no expert, but here are my 2 pennies worth of comments.
No experience with the panels you mentioned, but they have a high max current of >10 A.  The Deye / Sunsynk inverters will only take a max of 18 A per MPPT, so you can only hookup 1 input per MPPT (each MPPT has 2 inputs).
I have an OHM inverter (same as Deye / Sunsynk - all made by Deye and there are many other brands), but I have noticed that only Sunsynk has any form of support and/or regular upgrades, so would agree with you about going for the Sunsynk above the Deye.
Good luck

@Halcyon
I have the OHM 8 kW inverter which I run mainly in off-grid mode, but occasionally need grid power to charge batteries when the weather is not co-operating.  After reading about the issue of neutral - earth bonding, I tested my setup in off-grid mode and found V readings as follows L - N = 244, L - E = 50 and N - E =18 (On-grid it's L - N = 244, L - E = 230 and N - E = 1).  Testing the E/L unit (button on the E/L) in the downstream DB, it trips as expected, both off-grid and on-grid.
To me it appears I have the floating neutral problem and was wondering about how you connected the Axpert earthing box relay you mentioned to the inverter, and where did you get it?
Regards,
Rob

@Leslie
Just did a rough calculation on your setup and if the ambient temp is about 10 C, then your predicted max PV Voc will be about 580 V, which happens to be the maximum V the ESS Smile will handle. 
The solution, I think, is to split the array into 2 strings (6 panels in series) in parallel.  This will halve the PV voltage, but double the Amperage which will have to be taken into account if you have fuses and cable sizing.

My solution to the Neutral-Earth bond in the OHM 8 kW inverter.
Decided to mount the power relay inside the inverter, rather than in the DB (as suggested by @Vassen).  Appears to be working well with no voltage potential between Neutral and Earth in either grid-tied or off-grid modes.  Took the signal from the Grid input of the inverter.
This version of the Deye / SunSynk / Ingwe / OHM / Sol-Ark / etc. etc., does not have the ATS 240 pins, nor the ability to upgrade the software (not anywhere I can find that is).
This lack of obvious software support for the various models (all made by Deye apparently) is a strong indicator to opt for the SunSynk brand, as they do have an active support team and forum with a recent upgrade to the software  that addresses this very issue.  My 2 pennies worth.
Thanks to @Halcyon and @Vassen for their suggestions and input.
Keep safe

My solution to the Neutral-Earth bond in the OHM 8 kW inverter.
Decided to mount the power relay inside the inverter, rather than in the DB (as suggested by @Vassen).  Appears to be working well with no voltage potential between Neutral and Earth in either grid-tied or off-grid modes.  Took the signal from the Grid input of the inverter.
This version of the Deye / SunSynk / Ingwe / OHM / Sol-Ark / etc. etc., does not have the ATS 240 pins, nor the ability to upgrade the software (not anywhere I can find that is).
This lack of obvious software support for the various models (all made by Deye apparently) is a strong indicator to opt for the SunSynk brand, as they do have an active support team and forum with a recent upgrade to the software  that addresses this very issue.  My 2 pennies worth.
Thanks to @Halcyon and @Vassen for their suggestions and input.
Keep safe

The only difference that I can see, (there are some hardware differences with my OHM), between SunSynk and their brand clones is in the software interface.  SunSynk uses the same software as Sol-Ark in the USA; whilst OHM, Ingwe and Deye use a different but similar and I think more intuitive interface.  However, the SunSynk interface appears to be better supported and has had software upgrades with some improvements (including a software option to use the GEN signal for a Neutral-to-Earth bond relay when in "island" mode) and has an active forum on their website.  I have not located such activity for the Deye, Ingwe or OHM brands. 
I have the OHM 8kW inverter and am very happy with the way it's performing, although mainly in off-grid mode (CoCT requirements if inverter exceeds 3,6 kW with a 60A main breaker).

I have bought from ArtSolar on a number of occasions.  Excellent service and very fast delivery, IF they have stock.  My original deliveries were delayed because of the general Covid 19 lockdown, but that was hardly their fault.
Delivery costs are calculated before checkout, so you can check.  Strangely, you can save a fair amount in delivery charges if you order the panels in small batches (3 was the best in my case - came to about R540-00 for 3 panels delivered to Cape Town, 4 panels was double that.  I think it goes on weight and if you exceed a certain weight then you are at the next level with an exponential increase in cost).
Panels are working fine and delivering the expected power.  I supported them as they are a local manufacturing company that actually produce a quality product.  Only time will tell how they fare for longevity, but they provide a very decent guarantee / warranty.

I have bought from ArtSolar on a number of occasions.  Excellent service and very fast delivery, IF they have stock.  My original deliveries were delayed because of the general Covid 19 lockdown, but that was hardly their fault.
Delivery costs are calculated before checkout, so you can check.  Strangely, you can save a fair amount in delivery charges if you order the panels in small batches (3 was the best in my case - came to about R540-00 for 3 panels delivered to Cape Town, 4 panels was double that.  I think it goes on weight and if you exceed a certain weight then you are at the next level with an exponential increase in cost).
Panels are working fine and delivering the expected power.  I supported them as they are a local manufacturing company that actually produce a quality product.  Only time will tell how they fare for longevity, but they provide a very decent guarantee / warranty.