Update: system is setup and running now. Single string for a save start, 9s (sweet spot as Timselectric suggested). Been observing it over the last 3 days, batteries are fully charged by midday. I use smail fridge 0.5A, 220v and inside lights to assist with excess current. Run system all through the night, and still maintain this circle. Thank you all for the expert, advice. I'm using the Sohigh gel batteries, any specific settings require? I welcome your suggestion. 
