Solar system for off-grid domestic load
This Off-grid solar systems require specialised off-grid inverters and battery systems large enough to store energy for 2 or more days. All solar power systems work on the same basic principles. Solar panels first convert solar energy or sunlight into DC power using what is known as the photovo
2025-06-28 16:29:36 - Adil Khan
Solar system for off-grid domestic load
Project Area of Specialization Electrical/Electronic EngineeringProject SummaryThis Off-grid solar systems require specialised off-grid inverters and battery systems large enough to store energy for 2 or more days. All solar power systems work on the same basic principles. Solar panels first convert solar energy or sunlight into DC power using what is known as the photovoltaic (PV) effect. The DC power can then be stored in a battery or converted by a solar inverter into AC power which can be used to run home appliances. Depending on the type of system, excess solar energy can either be fed into the electricity grid for credits, or stored in a variety of different battery storage systems.
Project Objectives(1) Capacity of each system should be 500W peak.
(2) System capacity of over 500W power Grid Tied Inverter should be used.
(3) Use of battery should be discouraged.
(4) A technical committee will be formed in order to ensure the use of quality panels and other accessories. Project Implemented under this program, has to use the panel and other accessories having similar quality and specification set by the technical committee. Use of programmable digital grid tied inverter should be encouraged.
(5) Solar power generated from the panel will flow direct to the load through a separate meter put into the meter room.
(6) Energy should be recorded through using separate meters.To get CDM facilities, remote control smart meters may be used.
Standalone solar PV power plant comprises of C-Si (Crystalline Silicon)/Thin Film Solar PV modules with intelligent Inverter with MPPT charging technology which feeds uninterrupted quality AC power to electrical loads. Batteries will be charged from solar energy by charge controller integrated in the inverter or by an external charge controller with MPPT technology. Other than PV Modules and Inverter/Inverters, the system consists of Module Mounting Structures, appropriate DC and AC Cables, Array Junction Boxes (AJB) / String Combiner Boxes (SCB), AC and DC Distribution Box, Vertical DB for Load segregation, Lightning Arrester, Earthing Systems, etc.
Benefits of the ProjectAvoid Power Outages.
Reduced electricity costs.
Easier Installation.
Easy Alternative for Rural Areas.
Keeping the Environment Clean and Green.
MODULE MOUNTING STRUCTURE:
Photovoltaic arrays must be mounted on a stable, durable structure that can support the array and withstand wind, rain, and other adverse conditions. The modules will be fixed on structures with fixed arrangement.
The module mounting structures shall have adequate strength and appropriate design suitable to the locations, which can withstand the load and high wind velocities. Stationary structures shall support PV modules at a given orientation, absorb and transfer the mechanical loads to the surface properly. 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 9 degree to 12 degree based on the location’s latitude in Kerala The PV module mounting structure shall have a capacity to withstand a wind velocity of 150 km/hr. Suitable fastening arrangement such as grouting and calming should be provided to secure the installation against the specific wind speed. The PV array structure design shall be appropriate with a factor of safety of min 1.5. The STAAD / Equivalent structural design report must be attached along with the technical bid as Annexure II-K. The materials used for structures shall be Hot dip Galvanized Mild Steel conformed to IS 2062:1992 or aluminium of suitable grade minimum alloy 6063 or better. The minimum thickness of galvanization for hot dip Galvanized Mild Steel should be at least 80 microns as per IS 4759. The Bolts, Nuts, fasteners, and clamps used for panel mounting shall be of Stainless Steel SS 304. No Welding is allowed on the mounting structure Aluminium structures used shall be protected against rusting either by coating or anodization. Aluminium frames should be avoided for installations in coastal areas. The structure shall be designed to withstand operating environmental conditions for a period of minimum 25 years. And shall be free from corrosion while installation. Screw fasteners shall use existing mounting holes provided by module manufacturer. No additional holes shall be drilled on module frames. The total load of the structure (when installed with PV modules) on the terrace should be less than 60 kg/m2. Minimum distance between the lower level of PV Module and the ground shall be 0.6m from the ground level. The PV Panel area shall be accessible for cleaning and for any repair work. Sufficient gap need to be provided between the rows to avoid falling of shadow of one row on the next row. Seismic factors for the site will be considered while making the design of the foundation.
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Total in (Rs) | 78000 | |||
| Solar plates | Equipment | 4 | 12000 | 48000 |
| Battery | Equipment | 1 | 20000 | 20000 |
| Inverter | Miscellaneous | 1 | 10000 | 10000 |