alyusuph

I run 3 X  Coslight batteries with a Phocos AnyGrid 5Va/5Kva Inverter and have set them at Bulk charge 53.5V and Float at 53.0 Volts. Equalisation is disabled, BMS cable to inverter disconnected; Communication between batteries is there (connected). All dip switches set at 0000 and then restarted them starting with the "assumed" master battery (the one directly connected to the inverter) . They work like charm and have very good synchronised charging and discharging. At first the supplier had advised setting float charge as per the Coslight sticker (54V) which cause one of the batteries to display a red fault light. 
Note that the Coslight battery specs sheet shows that they have to be charged at -54V Float 

Where are you based? I got mine (Indian made) from AfroCube in Harare, they may direct you to a supplier in South Africa. Let me know if you need their vontacts. By the way, once switched on for the first time, you do not need to open the cover again, you can just use the 1/0 pin hole to switch on and off (a good way to tell you your battery was brand new).
Also when connected Slave and Primary) you just need to switch on one of them. 

In very rare situations I been getting more than the PV Wattage 3.1KW 100 watts more)  for short periods at around 11.00 AM even though the PV orientation is North West my setup is -15 X 200Watts Forge Poly PVs connected in series + 5KVA Victor NM II Inverter. 

Only if the SOC goes below about 20%. If you're using them in standby, this should be fine.
But I can't see any reason to charge them slowly. As long as the charge settings (e.g. bulk/absorb voltage) are correct, and as long as you stay below the manufacturer's recommended maximum charge current (usually C/2), there should not be any problem.
Using very high charge voltages (such as the Pylontech recommended charge voltage of 53.2 V for 15S LFP) can cause issues, but charging at 2 A maximum may not help with that problem anyway.

For safety reasons, especially during shipping Coslight employs a different battery switching on mechanism
1) First open the top cover of the battery, you will see the screws around the top cover
2) press the 1/0 hole with a paper clip, or anything that can fit in than hole
3) partially open the cover, take a screw driver and short the neutral terminal? with the positive (I think) (there is a black rubber clip which you have to remove in order to do that. Thats how mine were switched on by the technicians. The batteries will switch on.