Solar100 Malaysia Installation Guide

What Is the Solar Installation Process in Malaysia?

Last updated: July 2026

The solar installation process in Malaysia normally begins with an electricity-bill review and site assessment, followed by system design, quotation, approval or programme application, equipment installation, electrical testing, commissioning and performance monitoring.

Quick Answer A typical Malaysian rooftop solar project involves appointing a qualified solar provider, reviewing electricity consumption, inspecting the roof and electrical system, preparing the technical design, confirming the quotation, completing applicable Solar ATAP, self-consumption, utility or regulatory requirements, installing the equipment, testing the system and activating monitoring. The exact steps depend on the property, system size, location and applicable solar arrangement.

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What Are the Main Steps in a Malaysian Solar Installation?

Review Electricity Use

The provider reviews recent electricity bills, tariff category and daytime consumption.

Assess the Property

The roof, structure, shading, electrical system and site access are inspected.

Design the System

The provider proposes the system capacity, layout, equipment and expected generation.

Confirm the Quotation

The customer reviews the price, scope, exclusions, warranties and payment terms.

Complete Applications

Applicable programme, utility, technical or regulatory submissions are prepared.

Install and Commission

The equipment is installed, tested, activated and handed over to the customer.

The Sequence May Vary: Some technical assessment, application and procurement activities may take place at the same time. The applicable process depends on the selected solar arrangement and project requirements.

Step 1: Initial Consultation and Electricity-Bill Review

The process normally begins with a discussion about the customer’s electricity use, property, objectives and budget.

Review recent electricity bills
Confirm monthly kWh consumption
Identify the electricity tariff category
Review daytime operating hours
Identify major electrical loads
Discuss expected future electricity use
Confirm property ownership or authorisation
Discuss cash or financing options
Identify interest in battery storage
Confirm the customer’s main objectives

Residential Objective

A homeowner may want to reduce monthly grid-electricity purchases, prepare for future EV charging or improve energy resilience.

Commercial Objective

A business may focus on daytime cost reduction, long-term energy planning, sustainability targets or operational savings.

Provide More Than One Bill: A full year of electricity data can help the provider understand seasonal consumption and avoid sizing the system from one unusual month.

Step 2: Site, Roof and Electrical Assessment

The provider inspects whether the property is technically suitable for the proposed solar system.

Roof Assessment Roof material, condition, slope, orientation, available area and obstructions are reviewed.

Shading Assessment Trees, neighbouring buildings, water tanks and rooftop equipment are checked for potential shading.

Structural Assessment The provider assesses whether further structural review or reinforcement may be necessary.

Electrical Assessment The main switchboard, distribution board, supply type, cable routes and protection system are inspected.

The site assessment may include:

Roof dimensions
Roof age and condition
Existing roof leaks
Roof access points
Building height
Panel orientation options
Potential panel layout
Inverter location
Battery location, if applicable
AC and DC cable routes
Main switchboard condition
Single-phase or three-phase supply
Earthing condition
Lightning and surge protection
Internet or communication availability
Site safety requirements

Roof Repairs Should Be Completed First: Installing solar over a roof that needs replacement, waterproofing or major repair may create additional removal and reinstallation costs later.

Step 3: Solar System Design and Generation Estimate

After reviewing the site and electricity profile, the provider prepares a proposed technical design.

System Capacity

The proposed capacity in kWp should reflect electricity usage, available roof area and the selected energy arrangement.

Panel Layout

The layout shows the panel quantity, placement, orientation and roof areas to be used.

Equipment Selection

The provider selects the panel, inverter, mounting, protection and monitoring equipment.

Generation Forecast

Estimated monthly and annual solar generation is calculated using the proposed design and stated assumptions.

A technical proposal should normally identify:

Total system capacity in kWp
Panel quantity and wattage
Panel manufacturer and model
Inverter manufacturer and model
Inverter capacity
Mounting-system type
Panel layout
Estimated annual generation
Estimated self-consumption
Estimated excess electricity
System-loss assumptions
Shading assumptions
Monitoring arrangement
Battery specifications, if applicable

The Largest System Is Not Always the Best Design: The proposed capacity should consider daytime load, roof constraints, excess generation and the customer’s financial objective.

Step 4: Quotation, Scope and Contract Review

The customer should review more than the total package price before accepting the proposal.

Quotation Item	What to Check	Why It Matters
Equipment	Exact panel, inverter and mounting-system models	Different products may have different performance and warranties
Installation Scope	Included roof, electrical, access and protection work	Excluded work may become an additional charge later
Applications	Which submissions, fees and supporting documents are included	The customer should understand who manages each requirement
Generation Estimate	Annual output, self-consumption and financial assumptions	These assumptions affect projected savings and payback
Warranty	Product, inverter, workmanship and performance coverage	Warranty duration alone does not explain the claim process
Payment Terms	Deposit, progress payments, final payment and financing cost	Payment timing affects customer risk and cash flow

Check Every Exclusion: Roof repairs, structural reinforcement, switchboard upgrades, scaffolding, internet connection, authority fees and additional cable routes may be excluded from the initial package.

Step 5: Solar Application and Approval Process

The required submission depends on whether the system is installed under Solar ATAP, a self-consumption arrangement or another applicable project structure.

Solar ATAP Application

Where Solar ATAP applies, the appointed registered solar service provider normally prepares and submits the application through the relevant online system.

Self-Consumption Requirements

A self-consumption project may require technical submissions, notifications, licensing checks or other steps depending on the system and location.

Utility Requirements

Connection, metering, protection and operating requirements may need to be reviewed with the relevant utility.

Regulatory Requirements

The provider should determine which electrical, technical, safety or approval requirements apply to the project.

Application documents may include:

Customer identification documents
Electricity account information
Property ownership documents
Owner authorisation, if required
Recent electricity bills
Solar system specifications
Panel and inverter data sheets
Proposed panel layout
Single-line electrical diagram
Protection-system information
Professional declarations or certifications
Structural information, if required
Application forms
Applicable fees

Do Not Purchase Equipment Before Confirming Key Requirements: Where approval, eligibility or capacity confirmation is important, the contract should explain what happens if the proposed arrangement is not approved as expected.

Step 6: Pre-Installation Preparation

Once the design and applicable requirements are confirmed, the provider prepares the site, materials and installation plan.

Confirm final system design
Confirm equipment availability
Schedule delivery
Confirm installation dates
Arrange site access
Arrange scaffolding or lifting equipment
Complete required roof repairs
Complete structural reinforcement
Complete switchboard upgrades
Confirm inverter location
Confirm cable routes
Confirm working-hour restrictions
Prepare safety documentation
Coordinate planned electricity shutdowns

Commercial Sites May Need Additional Coordination: Factories, offices and retail premises may require work permits, safety inductions, shutdown planning and installation outside normal operating hours.

Step 7: Solar Panel and Electrical Installation

The physical installation generally includes mounting equipment on the roof, installing the panels, routing cables, installing the inverter and completing the electrical connection.

Set Up Site Safety

Access control, fall protection and other safety arrangements are established.

Install Mounting System

Rails, brackets, clamps or other mounting components are fixed to the roof.

Install Solar Panels

The panels are positioned and secured according to the approved layout.

Install DC Cabling

Panel strings, connectors, cable containment and DC protection are installed.

Install Inverter and AC System

The inverter, AC cabling, isolators and protection equipment are installed.

Connect Monitoring

The monitoring platform, communication equipment and customer access are prepared.

Installation Quality Matters: Poor cable management, unsuitable connectors, inadequate waterproofing, incorrect protection or weak mounting practices may create long-term safety and performance risks.

Step 8: Electrical Testing and System Commissioning

The system should be inspected and tested before normal operation.

Visual inspection
Mounting-system inspection
Panel and connector inspection
Cable-polarity testing
Insulation-resistance testing
Continuity testing
Earthing verification
Protection-device verification
DC voltage testing
AC voltage testing
Inverter start-up checks
Communication testing
Monitoring-platform testing
Emergency shutdown verification
System performance checks
Commissioning documentation

Commissioning Is More Than Switching the System On: The provider should verify electrical safety, protection settings, inverter operation, monitoring and the completed installation records.

Step 9: Metering, Connection and System Activation

Depending on the selected arrangement, additional metering, connection, verification or utility steps may be required before the system operates under its intended commercial arrangement.

Metering Arrangement The applicable meter and measurement configuration should be confirmed.

Utility Coordination Any required inspection, meter work or connection activity should be completed.

Operating Approval The provider should confirm when the system may operate under the selected arrangement.

Initial Performance Check Early generation and monitoring data should be reviewed after activation.

Physical Installation Does Not Always Mean Immediate Programme Activation: The system may be physically complete before every administrative, metering or commercial step is finalised.

Step 10: Customer Handover and Solar Monitoring

After commissioning, the customer should receive the information needed to understand, monitor and safely operate the system.

System capacity and equipment list
Final panel layout
Single-line diagram
Commissioning records
Testing results
Product data sheets
Panel warranty documents
Inverter warranty documents
Workmanship warranty
Monitoring login details
System shutdown procedure
Emergency contact details
Maintenance recommendations
Application or approval records
Service and claim procedures

Monitor the First Few Weeks Carefully: Early monitoring can help identify communication issues, inverter faults, unusual shutdowns or generation that differs materially from expectations.

Step 11: After-Sales Support and Maintenance

Solar systems require relatively limited routine attention, but monitoring and periodic inspection remain important.

Performance Monitoring

Generation should be reviewed for unexpected drops, faults or extended periods of downtime.

Panel Condition

Heavy dirt, debris, damage or new shading may affect system output.

Electrical Inspection

Cables, connectors, protection devices, inverter operation and earthing may require periodic inspection.

Warranty Support

The customer should know who manages product, inverter and workmanship warranty claims.

After-sales arrangements may include:

Remote monitoring support
Fault notifications
Performance reviews
Preventive inspections
Panel cleaning
Thermal inspection
Electrical testing
Inverter servicing
Warranty-claim assistance
Roof-related inspection
System expansion support
Battery servicing, if applicable

How Long Does the Solar Installation Process Take?

The physical installation may take considerably less time than the entire project process. The complete timeline depends on site complexity, documentation, application requirements, equipment availability, weather and utility or regulatory coordination.

Project Stage	What May Affect the Timeline	Possible Delay
Consultation and Site Assessment	Customer availability, site access and electricity data	Missing bills or inaccessible roof areas
Design and Quotation	System complexity and engineering review	Design changes or additional structural requirements
Application and Approval	Selected arrangement and document completeness	Incomplete documents or requested revisions
Equipment Procurement	Stock availability and approved equipment selection	Supply-chain or delivery delays
Physical Installation	System size, roof type, weather and site access	Rain, safety restrictions or unexpected roof defects
Testing and Activation	Commissioning, metering and applicable coordination	Technical corrections or scheduling requirements

Do Not Rely on an Installation-Date Promise Alone: Ask for a milestone schedule covering design, submissions, procurement, physical installation, commissioning and activation.

What Is the Difference Between Solar100 and a Solar Provider?

Solar100	Solar Provider or Installer
Explains the general Malaysian solar installation process	Assesses the customer’s property and electricity profile
Helps users understand common project stages	Prepares the technical design and project quotation
Highlights common questions, exclusions and risks	Manages applicable submissions according to the agreed scope
Helps users compare participating providers	Procures and installs the solar equipment
Does not issue engineering approval or install equipment	Tests, commissions and hands over the completed system
Does not guarantee approval, timeline or project performance	Provides warranties and support according to the contract

What Should You Prepare Before Requesting a Solar Quotation?

Property address
Property type
Recent electricity bills
At least 12 months of usage data
Electricity account details
Current tariff category
Daytime operating hours
Major electrical loads
Future electricity-use plans
Roof photographs
Roof type
Approximate roof age
Known roof defects
Available building drawings
Available structural drawings
Available electrical diagrams
Property-ownership information
Preferred payment method
Battery or backup requirements
Target project timeline

Frequently Asked Questions

What is the first step when installing solar in Malaysia?

The process usually begins with a review of electricity bills, daytime consumption, property details and the customer’s objectives.

Is a site assessment required before solar installation?

A proper assessment is important for reviewing the roof, structure, shading, electrical system, access and possible additional work.

Who submits a Solar ATAP application?

Where Solar ATAP applies, the appointed SEDA Malaysia Registered PV Service Provider normally manages the application submission through the applicable online system.

Can solar panels be installed before approval is completed?

The correct sequence depends on the selected arrangement and contract. Key eligibility, capacity and technical requirements should be confirmed before irreversible work or equipment commitments.

How long does physical solar installation take?

It depends on system size, roof type, access, weather and electrical work. The full project timeline may be longer than the physical installation period.

What documents should I receive after installation?

Customers should receive system specifications, drawings, test and commissioning records, warranties, monitoring access and operating instructions.

The information on this page is provided for general educational and comparison purposes. It is not an engineering design, regulatory approval, utility approval, installation contract, safety certification, fixed project timeline or guarantee of eligibility. The actual solar installation process depends on the property location, electricity supply, selected programme or arrangement, system capacity, roof condition, structural requirements, utility requirements, regulatory requirements and provider scope. Solar100 is a discovery and comparison platform. It is not a solar installer, engineering consultant, electricity utility, regulator or government authority. Customers should obtain project-specific advice and written confirmation from the appointed qualified provider before proceeding.

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