This is a 5 kW Solar system that installed by Paragon Green Energy, Karachi, in February 2017.
System working on 450v to 900v from the PV, we designed on 720V with max 7amp from the solar panels, MPPT generates more ampares.
This project working fine 
System Specifications and other details:
Installation Time : 2 Days
Installation Location : Landhi, Karachi
Panels: 5000 Watts Grade A panels
Inverter: GROWATT 5kW Inverter
Racking/Mounting: Self made Iron Mounting
10mm Wire from PV to Inverter
Batteries : 200ah x 8 AGM Batteries with rack
PV Circuit Breakers
75 amp Battery Breaker
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Post time: Jul-03-2017