B&B Green Energy Expert Guide
Solar Installation Process in Kerala: A Complete Step-by-Step Guide
Planning to switch to solar? This guide explains each step. It covers bill review, roof survey, system design, approvals, installation, net metering, and maintenance.
Start with the right plan
What Does Solar Installation Include?
Solar installation is more than fixing panels to a roof. A good system should match your power use, sunlight, usable roof area, and electrical capacity.
A complete system includes solar panels, an inverter, mounting structure, cables, isolators, distribution boxes, surge protection, earthing, monitoring, and approved metering when needed.
The right system size starts with your electricity use. Check recent bills, daytime use, sanctioned load, shade-free roof space, and future needs.
Select the configuration
Types of Solar Systems
The right system depends on your main goal: lower bills, backup during outages, or full grid independence.
On-grid solar
Connected to the utility grid and mainly used to reduce electricity bills. Eligible extra power can be sent to the grid through approved net metering. Standard on-grid systems shut down during power cuts for safety.
Off-grid solar
Uses batteries and can work without the grid. It suits remote sites or selected backup loads. Batteries add cost, need space, and may need replacement later.
Hybrid solar
Combines solar panels, grid power, and batteries. It provides backup and more control over energy use. It usually costs more than a standard on-grid system.
From assessment to handover
Solar Installation: Step by Step
Review electricity consumption
The installer reviews recent bills, tariff, sanctioned load, daytime use, peak demand, and future needs such as air conditioners, pumps, or EV charging.
Conduct a site and roof survey
Engineers measure the roof, check its condition, study shade, plan cable routes, and keep safe access for cleaning and maintenance.
Design the solar system
The design sets the system size, panel layout, inverter rating, mounting structure, safety devices, earthing, and expected output.
Prepare the detailed quotation
A clear quotation should list product brands, models, warranties, installation work, approval support, service coverage, and exclusions.
Complete approvals and registrations
For an eligible grid-connected project, complete feasibility checks, consumer documents, subsidy registration, and utility steps in the correct order.
Install the structure and panels
The mounting structure is fixed to suit the roof type. Panels are placed to reduce shade and allow safe drainage, cleaning, and maintenance.
Complete electrical installation
The inverter, cables, isolators, distribution boxes, surge protection, earthing, and monitoring system are installed as per the design.
Test, inspect and commission
Technicians check wiring, insulation, safety devices, inverter operation, and monitoring before utility inspection and grid connection.
Install the meter and hand over documents
After approval, the required meter is installed. The owner receives warranties, system details, monitoring access, approvals, and a maintenance schedule.
Plan capacity realistically
How Much Solar Capacity Do You Need?
System size should match your electricity use, usable roof space, and approved electrical capacity. A common planning estimate in Kerala is about four units per installed kW per day. Actual output can vary.
- Monthly electricity consumption
- Daytime versus night-time demand
- Sanctioned electrical load
- Shade-free roof area
- Roof orientation and obstructions
- Seasonal weather variation
- Panel and inverter efficiency
- Future electricity requirements
Indicative planning guide
| Capacity | Roof area* | Daily output* |
|---|---|---|
| 1 kW | 80–100 sq. ft. | About 4 units |
| 3 kW | 240–300 sq. ft. | About 12 units |
| 5 kW | 400–500 sq. ft. | About 20 units |
| 10 kW | 800–1,000 sq. ft. | About 40 units |
*Planning estimates only. Final area and output depend on equipment, layout, roof direction, shade, season, and system losses.
Understand your quotation
What Affects Solar Installation Cost?
Solar panels
Panel type, efficiency, brand, and warranty affect both cost and output.
Inverter and storage
On-grid, hybrid, and off-grid inverters work differently. Adding batteries increases both capability and cost.
Roof and structure
Tile roofs, metal roofs, concrete terraces, and hard-to-reach roofs need different mounting solutions.
Safety and service
Cables, earthing, surge protection, monitoring, documents, and after-sales support all affect long-term value.
Grid connection and support
KSEB Net Metering and Solar Subsidy
For eligible on-grid systems, KSEB requires application, feasibility approval, registration, inspection, and approved metering. A bi-directional meter records power taken from and sent to the grid.
Eligible home owners may qualify for Central Financial Assistance under PM Surya Ghar. Approval depends on current rules, approved equipment, vendor requirements, documents, and successful commissioning.
Follow the correct order. Check current eligibility and complete required registration before installation. Subsidy amounts and procedures can change.
Quality that lasts
What to Check Before Choosing an Installer
Engineering and safety
- Site-specific shadow and roof assessment
- Documented panel layout
- Correct inverter sizing
- Rated electrical protection and earthing
Products and warranties
- Exact component makes and models
- Manufacturer-backed warranties
- Corrosion-resistant mounting structure
- Generation monitoring access
Service and approvals
- Clear utility-documentation responsibility
- Written workmanship warranty
- Local fault-response process
- Defined maintenance coverage
Ready to switch to solar?
Request a Free Solar Site Survey
B&B Associates, operating as BandB Green Energy Solutions Pvt Ltd, provides site assessment, design, installation, approval support, and after-sales service for residential and commercial solar projects.
Frequently asked questions
Solar installation FAQs
How long does a residential solar installation take?
A simple residential installation can often be completed within a few days once materials and approvals are ready. The full process takes longer when utility approval, inspection, and meter installation are included.
Does an on-grid solar system work during a power cut?
A standard on-grid inverter shuts down during a power cut for safety. Backup requires a properly designed hybrid or battery system.
How much electricity does a 1 kW solar system produce?
A common planning estimate in Kerala is about four units per day per installed kW. Actual output depends on season, shade, roof direction, temperature, equipment efficiency, and system losses.
Can solar panels be installed on tiled or metal roofs?
Yes. The mounting method should suit the roof material, structure, waterproofing, and wind conditions. A site survey should confirm suitability.
How often do solar panels need maintenance?
Solar systems need periodic checks and safe cleaning when dirt reduces output. Cables, mounting structures, earthing, and safety equipment should also be inspected.
Is a government subsidy available for solar installation?
Eligible home owners may qualify under the current PM Surya Ghar scheme. Check the latest rules and eligibility before ordering the system.
Continue your solar research
Helpful B&B solar guides
Solar Panels for HomeRooftop Solar Installation GuideView Solar Projects
B&B Associates (BandB Green Energy Solutions Pvt Ltd)
35, A/VIII, Puthuppally, Kottayam, Kerala 686011
+91 99467 59777 · md@bbassociates.org