On Grid Solar System Price in Kerala

ROI/ Payback period in 3 to 4 years for KSEB Electricity Bill above INR 4000/-

Procuring the Panels or Inverters doesn’t mean the power plant withstands 25 years lifetime. It needs to follow the Global IEC (International Electro-Technical Commission) Standards for Design, Safety, Performance. We at Comorin Solar, strictly adhere to the Rooftop Standards set by IEC, IS, BIS, MNRE, KSEB, ANERT and other Governing bodies for Solar Power and EV Chargers.

List of IEC Standards followed:

Appropriate PV Design
IEC 62548
Installation Quality
IEC 63049
Commissioning & Operations
IEC 62446-1
Onsite IV measurement - to be in-line with
IEC 61829
System Maintenance
IEC 62446-2
Performance Monitoring
IEC 61724-1
Capacity Evaluation
IEC 61724-2
Energy Evaluation
IEC 61724-3

This in-turn helps our customer to Ensure the Solar Power plant on their Roof Withstands for lifetime.

DC and AC Cable

Cable Cabling is required for wiring from AC output of inverter/PCU to the Grid Interconnection point. It includes the DC cabling from Solar Array to AJB and from AJB to inverter input.

Sizes of cables between any array interconnections, array to junction boxes, junction boxes to inverter etc. shall be so selected to keep the voltage drop (power loss) of the entire solar system to the minimum (2%).

For the DC cabling, XLPE or XLPO insulated and sheathed, UV stabilized single core flexible copper cables shall be used; Multi-core cables shall not be used. 35.4 For the AC cabling, PVC or XLPE insulated and PVC sheathed single or, multi-core flexible copper cables shall be used. However, for above 10kWp systems, XLPE insulated Aluminium cable of suitable area of cross section can be used in the AC side subject to a minimum area of cross section of 10 sq.mm.

Array Support Structure

Each structure with fixed tilt should have a tilt angle as per the site conditions to take maximum insolation which will be approximately equal to the latitude of the location facing true South with a North - South orientation. The tilt angle can vary from 12 degree to 15 degree based on the location’s latitude in Kerala. The Bolts, Nuts, fasteners, and clamps used for panel mounting shall be of Stainless-Steel SS 304.

Surge Protection

The system should have installed with Surge Protection Device (SPD) for higher withstand of the continuous PV-DC voltage during earth fault condition. SPD shall have safe disconnection and short circuit interruption arrangements through integrated DC in-built bypass fuse (parallel) which should get tripped driving failure mode of MOV, extinguishing DC arc safely in order to protect the installation against fire hazards. The SPD should be provided in the AC Distribution Box as well.

Earthing

The Solar PV Plant should have a dedicated earthing system. The Earthing for array and LT power shall be made as per the provisions of IS:3043-2018 “Code of practice for earthing (Second Revision),” that governs the earthing practices of a PV system and IS 732:2019 “Code of practice for electrical wiring installations (Fourth Revision)

Minimum four (04) numbers of interconnected earth pit needs to be provided in each location. Minimum required gap shall be provided in between earth pits as per relevant standard. Body earthing shall be provided in inverter, each panel frame, module mounting structure, kiosk and in any other item as required.

Earth resistance shall not be more than 5 ohms

The lightning conductors shall be made as per applicable Indian Standards in order to protect the entire array yard from lightning stroke.