Solar Panel Installation Guideline

SOLAR PANEL INSTALLATION GUIDELINE

October 2, 2023 Leave a comment

21.2.1 Solar Photovoltaic Power Generation System (NATIONAL BUILDING CODE 2016) Building Type Plot Size Generation Requirement Residential (Plotted houses) 100 m2 and above 1 kWp or 5% of connected load, whichever is higher Residential (Group housing) All sizes Minimum 5% of connected load Business, educational buildings having connected load of 30 kW and above 500 m2 and above 5 kWp or 5% of connected load, whichever is higher Mercantile, hotels, motels, assembly, industrial and institutional buildings 500 m2 and above for buildings having connected load of: (a) 50 to 1000 kW=10 kWp or 5% of connected load whichever is higher (b) Above 1 000 kW=50 kWp or 5% of connected load whichever is higher

SOALR INSTALLATION -CENTRAL ELECTRICITY AUTHORITY-2023 (12.1) PATH WAY FOR SOLAR SYSTEM Clear pathways of minimum 75cm in width with hand rails for roof access and emergency exit shall be provided for roof top system. there shall be clear pathways, walkways between the rows or columns of solar panels which is necessary for cleaning and maintenance; FENCING ground mounted solar installations shall be protected by fencing or other means not less than 1.8 meter in height so as to prevent unauthorized entry; ISOLATING DEVICE Disconnection switches or circuit breakers provided in combiner boxes to disconnect the photovoltaic system from all other conductors of the system shall be located at a readily accessible location; three phases on the alternating current side, and positive and negative conductor on the direct current side shall be marked and identified with different colours manual disconnection switch to isolate the system from grid and shall be situated outside the alternating current combiner box INVERTER inverter unit for solar photovoltaics shall be installed in the periphery of the building and as near as the solar panel: PROTECTION protection shall be deployed (for both input and output) on site for overload, surge current, surge voltage, short circuit, high temperature, over voltage, under voltage and over frequency, under frequency, reverse polarity and lightning. the solar photovoltaic power plant shall be provided with lightning and over voltage protection by deploying required number of lightning arresters as per the relevant standards;

Guidelines for Installation of Solar Energy System (Government of Kerala-Electrical Inspectorate) SOLAR SYSTEM APPROVAL 10kW and up to and including 30kW : completion report and SLD shall be submitted by the consumer through a competent electricals contractor and sanction for energization shall be obtained from the district office concerned 30kW to 5O0kW: Prior scheme approval and sanction for energization orders shall be obtained from the district office concerned above 500kW :Prior scheme approval and sanction for energization orders shall be obtained from the office of the Chief Electrical Inspector PANEL MOUNTING STRUCTURE Galvanized iron (Gl) or aluminum shall be used for module mounting structures. Be located at a height of at least 2.44 m above the ground level CABLE SIZE Cable size for PV string cable, PV sub-array cable and PV array main cable shall be selected as per section 7.3.7 of IEC 62548/2016. PV CELL PV string connected in parallel shall have matched open circuit voltage within 5% per string to avoid circulating current. (Refer section 5.1.6 of IEC 62548/2016). Solar PV module details such as number of modules, wattage, number of cells, voltage, current etc. shall be verified INVERTER Inverter capacity shall be selected based on the solar PV generation, so that maximum generation can be utilized. Inverter protection settings, installer details and emergency shutdown procedures shall be displayed on site. HARMONIC INJECTION PV system shall not inject DC current greater than 1 percent of the inverter rated output current into the grid. Solar inverters shall be rated for THD of less than 3 percent of power injected into the grid Harmonic current injections from a generating station shall not exceed the limits specified in IEEE 519 The distributed generating resource shall not inject direct current greater than 0.5 % of the full rated output at the interconnection point PARALLELING THE SYSTEM Paralleling device of distributed generation resource shall be capable of withstanding 220 % of the nominal voltage at the interconnection point. VOLTAGE FLUCTUATION Every time the generating station is synchronised to the electricity system, it shall not cause voltage fluctuation greater than ± 5 % at the point of connection The distributed generating resource shall not introduce flicker beyond the limits specified in IEC 61000 EARTHING Up to 5kW solar plants, 2NO’S of earth electrodes are sufficient and LA shall be provided in lightning prone area. Above 5kW and up to 100kW solar plants, 3NO’S of ea…