Solar100 Malaysia Solar Contract Guide

What Should Be Included in a Solar Installation Contract?

Updated: July 2026

A solar installation contract should explain exactly who is responsible for the project, what system will be supplied, which services and fees are included, how the installation will be carried out, when payments become due and what happens if the design, equipment, approval, timeline, workmanship or warranty outcome changes.

Quick Answer The contract should identify the legal contracting company, customer and project address; state the exact panel and inverter models, quantities, DC and AC capacities and system design; define the full project scope, application work, exclusions, price, taxes and payment milestones; explain roof, electrical, safety, testing, commissioning and handover responsibilities; and include written equipment warranties, workmanship coverage, roof-leak responsibility, warranty-labour terms, after-sales response, cancellation rights, delay provisions and dispute procedures.

✓ SEDA-Related Standards Review

✓ SSM Registration Information Review

✓ Policy & Application Process Review

✓ After-Sales Support Assessment

✓ Consultation & Quotation Comparison

Which Contracting Parties Should Be Identified?

The agreement should clearly identify the customer, legal contracting company and every technical or subcontracted party responsible for a material part of the project.

Customer’s full legal name
Customer’s identification or company details
Electricity-account holder
Installation-property address
Legal name of contracting company
SSM registration number
Registered business address
Company contact details
Named project representative
Named after-sales representative
Responsible RPVSP, where applicable
Registered electrical contractor
Relevant competent person
Engineering consultant, where required
Subcontractors performing material work
Equipment supplier or distributor

Contracting Company

The entity signing the agreement should be clearly connected to the quotation, invoice, payment account and warranty obligations.

Technical Parties

The agreement should identify who designs, supervises, installs, tests, commissions and certifies the electrical work.

Subcontractors

The main contractor should remain responsible for subcontracted work unless the contract clearly and lawfully provides otherwise.

Customer Contact

The correct customer email, telephone number and electricity-account information should be used for applications and project notices.

Check Who Receives the Money: The legal contracting entity, invoice issuer and payment-account holder should normally be consistent. Any difference should be explained and documented before payment.

Which Solar System Specifications Should Be Written into the Contract?

The contract should define the exact system being purchased. General descriptions such as “premium panels” or “high-efficiency inverter” are not sufficient.

System Item	Contract Details Required
Solar Panels	Manufacturer, exact model, quantity, wattage per panel, total DC capacity, product warranty and performance warranty
Solar Inverter	Manufacturer, exact model, quantity, rated AC capacity, phase, MPPT configuration, monitoring and warranty
Battery, If Included	Manufacturer, model, nominal and usable capacity, charging power, backup arrangement, operating modes and warranty
Mounting System	Rail, clamp, fastener and roof-attachment materials, corrosion protection and waterproofing method
Electrical Protection	Isolators, breakers, surge protection, earthing, enclosures, labels and connection arrangement
Monitoring Equipment	Application, portal, data logger, energy meter, current sensors, account access and subscription terms
System Design	Panel layout, string design, MPPT allocation, single-line diagram, interconnection point and cable routes

Total panel DC capacity
Total inverter AC capacity
DC-to-AC ratio
Single-phase or three-phase design
Panel layout
Panel orientation
Panel tilt, where relevant
String arrangement
MPPT allocation
Inverter installation location
Connection point
Protection arrangement
Monitoring scope
Battery and backup scope
Export-control arrangement
Future expansion limitations

Equipment Substitutions Must Be Controlled: The contract should state whether substitutions are permitted, what technical standard an alternative must meet and when the customer’s prior written approval is required.

What Should Be Included in the Solar Project Scope?

The scope should explain every service included in the agreed price and identify every foreseeable exclusion that may result in an additional charge.

Site Assessment

Inspect the roof, electrical installation, shading, access, connection point and proposed equipment locations.

System Design

Prepare the panel layout, string design, protection arrangement, calculations and required engineering documents.

Application Work

Prepare, submit and follow up the applicable Solar ATAP, technical, licensing, meter and utility documents.

Equipment Supply

Supply the specified panels, inverter, mounting, protection, monitoring and optional battery equipment.

Installation

Complete roof, mounting, cabling, electrical, labelling, access and protection work.

Testing and Handover

Test, commission, document and demonstrate the completed system before final acceptance.

Site visit and measurements
Roof-condition review
Shading assessment
Electrical-system inspection
System design
Engineering calculations
Application preparation
Application follow-up
Equipment procurement
Delivery and storage
Scaffolding or lifting equipment
Roof mounting
DC cabling
AC cabling
Protection and earthing
Meter or switchboard work
Monitoring configuration
Testing and commissioning
Customer training
Final documentation

Included Scope Should Be Specific: Statements such as “complete installation” should be supported by a detailed schedule describing the work, equipment, fees, documents and customer responsibilities.

Which Exclusions and Additional Costs Should Be Listed?

Possible Exclusion	What the Contract Should Explain
Technical Assessment	Whether CCC, CAS, PSS or another study is required, who appoints the provider and who pays the fee
Roof Repair	Existing defects, replacement of damaged materials, waterproofing outside the solar work and structural reinforcement
Electrical Upgrade	Main switchboard, distribution board, meter board, cable, protection or earthing modifications
Access Equipment	Scaffolding, mobile platform, crane, lifting, traffic management or restricted-access charges
Utility Charges	Application, meter, connection, study, testing or other third-party charges
Communication Equipment	Wi-Fi extension, Ethernet work, mobile-data plan, monitoring subscription or replacement logger
Future Service	Cleaning, inspection, preventive maintenance, fault diagnosis and out-of-warranty attendance

An Exclusion May Still Be Necessary: Work excluded from the fixed price may still have to be completed before the project can be safely installed, commissioned, approved or operated.

What Application and Approval Responsibilities Should Be Included?

The contract should define which programme or operating arrangement is proposed, which party prepares each submission and what happens if the application is delayed, returned, approved at a lower capacity or rejected.

Applicable solar programme
Application applicant
Responsible submitting party
Required customer documents
Required technical documents
Technical-assessment responsibility
Application fees
Utility fees
Generating-licence responsibility, if applicable
Registered electrical-contractor documents
Competent-person documents
Form G and Form H responsibility
Single-line diagram
Test results
Testing and commissioning form
Meter or contract coordination
Response to application queries
Document-correction responsibility
Approval condition management
Application handover to customer

Customer Documents The contract should list the identification, company, electricity account, authorisation and property documents the customer must provide.

Provider Documents The provider should be responsible for the technical drawings, certificates, test records and contractor documentation included in its scope.

Approval Outcome The agreement should explain the options if the approved system capacity is lower than the proposed capacity.

Application Failure Refunds, deductions and customer cancellation rights should be stated if the project cannot proceed.

Approval Should Not Be Treated as Guaranteed: Official review, technical feasibility, document completeness and programme conditions may affect approval and the permitted system capacity.

What Roof and Structural Terms Should Be Included?

The contract should distinguish existing roof defects from damage caused by the solar work and clearly allocate responsibility for inspection, mounting, waterproofing, repair and future removal.

Existing roof material
Estimated roof age
Existing cracks or leaks
Existing corrosion
Damaged tiles or sheets
Pre-installation photographs
Structural-assessment requirement
Roof-load assumptions
Mounting method
Roof-penetration method
Flashing and sealing method
Corrosion protection
Wind-load consideration
Drainage clearance
Maintenance access
Roof-leak warranty
Damage-repair responsibility
Removal and reinstallation cost

Roof Issue	Contract Requirement
Existing Defect	Record the condition and state whether repair is required before installation
Installation Damage	Identify who repairs damaged tiles, sheets, membranes, gutters, ceilings or structural components
Roof Leakage	Define the covered causes, response time, investigation process, warranty period and exclusions
Future Roof Work	Explain who pays to remove, store, reinstall and recommission the solar equipment

Use a Pre-Installation Condition Record: Photographs and written observations reduce later disputes about whether a roof defect existed before the solar installation.

What Electrical and Safety Responsibilities Should Be Included?

The agreement should identify the responsible electrical contractor and competent personnel, define the protection system and state who certifies the completed installation.

Responsible electrical contractor
Responsible competent person
Electrical design scope
DC isolators
AC isolators
Circuit breakers
Surge-protection devices
Earthing and bonding
Cable type and size
Cable support and containment
Connector compatibility
Weatherproof enclosures
Equipment labels
Emergency shutdown information
Safe access requirements
Testing responsibility
Certification responsibility
Defect-correction responsibility

Electrical Work Requires Appropriate Responsibility: The contract should not leave the design, supervision, testing or certification of electrical work to unidentified or unqualified parties.

What Price and Payment Terms Should Be Included?

The contract should state the complete agreed price, identify taxes and third-party fees and connect each payment to a clearly defined project milestone.

Payment Stage	Possible Milestone	Evidence to Require
Deposit	Contract execution and project initiation	Signed agreement, receipt and refund conditions
Application Payment	Application documents completed or submitted	Submission confirmation and fee breakdown
Equipment Payment	Equipment ordered, reserved or delivered	Models, quantities, delivery record and ownership terms
Installation Payment	Physical installation substantially completed	Inspection, progress record and outstanding-work list
Final Payment	Testing, commissioning and handover completed	Operational system, certificates, warranties and complete handover documents

Total contract price
Applicable taxes
Official fees included
Official fees excluded
Technical-study fees
Utility charges
Deposit amount
Progress-payment amounts
Payment due dates
Milestone definitions
Invoice requirements
Refund conditions
Retention amount
Late-payment charges
Financing charges
Price-adjustment conditions
Variation-order procedure
Quotation-validity period

Payment Should Follow Verifiable Progress: Avoid unclear schedules that require most of the contract price before equipment delivery, completed installation, testing, commissioning and customer handover.

What Timeline and Delay Terms Should Be Included?

The project schedule should distinguish estimated regulatory or utility timing from work controlled by the installer.

Contract commencement date
Customer-document deadline
Site-assessment date
Design-completion date
Application-submission target
Equipment-order date
Expected delivery period
Installation notice period
Installation duration
Testing date
Commissioning date
Handover date
Completion definition
Permitted extensions
Customer-caused delays
Installer-caused delays
Third-party delays
Delay-notice requirements
Delay remedies
Termination threshold

Physical Installation Complete Panels and equipment are installed, but testing, approval, meter work or commercial operation may still be outstanding.

Project Fully Complete The system has been tested, commissioned, documented, handed over and made operational under the agreed arrangement.

Define “Completion” Clearly: A system being mounted on the roof does not necessarily mean that the project has been tested, commissioned, approved, documented and placed into operation.

What Testing, Commissioning and Handover Terms Should Be Included?

The contract should state which inspections and tests will be completed, who signs the documents and what the customer must receive before final acceptance.

Visual Inspection

Check mounting, cable routes, labels, clearances, weather protection and visible workmanship.

Electrical Testing

Complete the applicable continuity, polarity, insulation, earthing, protection and operational tests.

Commission the Equipment

Configure the inverter, protection settings, meter, monitoring, battery and operating arrangement.

Confirm Operation

Verify generation, monitoring, import and export measurement, battery operation and alarms where included.

Correct Defects

Record incomplete or defective work and define the correction deadline before final acceptance.

Complete Handover

Transfer system documents, monitoring access, warranties, operating instructions and support contacts.

Final panel layout
Final single-line diagram
As-built cable routes
Equipment datasheets
Panel serial numbers
Inverter serial numbers
Battery serial numbers, if applicable
Test results
Testing and commissioning records
Completion certificates
Application documents
Approval documents
Equipment warranties
Workmanship warranty
Roof-leak warranty
Monitoring-owner access
Operating instructions
Emergency shutdown instructions
Maintenance recommendations
After-sales contacts

Make Complete Handover a Final-Payment Condition: Important certificates, warranty documents, serial numbers and monitoring access are usually easier to obtain before the contract price has been paid in full.

What Warranties and After-Sales Terms Should Be Included?

Warranty Area	Contract Details Required
Panel Product Warranty	Period, covered defects, registration, claim process and replacement basis
Panel Performance Warranty	Degradation schedule, testing method, claim conditions and remedy
Inverter Warranty	Period, local representative, repair or replacement process and expected lead time
Battery Warranty	Period, cycle or energy limits, usable-capacity conditions and operating exclusions
Workmanship Warranty	Mounting, cabling, electrical work, weather sealing, defects and correction obligations
Roof-Leak Warranty	Covered leaks, investigation process, response period, repair responsibility and exclusions
Warranty Labour	Diagnosis, travel, transport, access equipment, removal and reinstallation
After-Sales Support	Support channel, acknowledgement time, remote diagnosis, site-visit target and applicable charges

Warranty start date
Warranty registration responsibility
Warranty certificate delivery
Claim-submission responsibility
Fault-diagnosis responsibility
Site-visit charge
Transport charge
Scaffolding charge
Removal labour
Reinstallation labour
Replacement-equipment ownership
Replacement lead time
Temporary replacement availability
Monitoring support
Firmware-update responsibility
Preventive-maintenance scope
Support escalation process
Installer-closure arrangement

Manufacturer Warranty Does Not Automatically Include Labour: The contract should state who pays for diagnosis, transport, roof access, equipment removal and reinstallation when a component fails.

Should Generation and Savings Estimates Be Included?

A proposal may include estimated annual generation, electricity savings and payback. The contract should distinguish estimates from guarantees and identify the assumptions used.

Estimated annual generation
Solar-resource assumption
Roof-orientation assumption
Shading assumption
Temperature losses
Soiling losses
Cable and inverter losses
System availability
Annual degradation
Self-consumption assumption
Export assumption
Tariff assumption
Tariff-inflation assumption
Maintenance-cost assumption
Replacement-cost assumption
Payback-calculation method

Forecasts Should Be Supported, Not Overstated: Weather, electricity use, tariffs, export treatment, equipment downtime, degradation and maintenance may cause actual results to differ.

What Change, Cancellation and Termination Terms Should Be Included?

The agreement should explain how changes are approved, how additional costs are calculated and when either party may cancel or terminate the project.

Written variation-order requirement
Customer approval requirement
Price-adjustment method
Timeline-adjustment method
Equipment-substitution procedure
Design-change procedure
Lower approved-capacity procedure
Application-rejection procedure
Customer cancellation rights
Installer cancellation rights
Refund calculation
Non-refundable cost definition
Material-breach definition
Defect-correction period
Termination notice
Equipment ownership after termination
Removal responsibility
Roof-restoration responsibility
Document-transfer responsibility
Dispute-resolution procedure

Variation Order No additional work should be charged without a written description, price, timeline effect and authorised approval.

Equipment Substitution A replacement model should meet documented technical, warranty and compatibility requirements.

Cancellation The agreement should identify which actual costs may be deducted and what evidence must be provided.

Dispute Resolution The escalation process, governing law and relevant jurisdiction should be stated.

Do Not Leave Material Terms Blank: Missing equipment models, dates, payment triggers, warranty periods or responsibilities may create avoidable disputes after the agreement is signed.

Which Customer Responsibilities Should Be Included?

Provide accurate electricity bills
Provide account-holder documents
Provide company documents, where relevant
Provide property-access permission
Disclose known roof defects
Disclose planned renovations
Provide internet access, if required
Provide safe site access
Obtain landlord consent, if required
Obtain management consent, if required
Respond to document requests
Approve drawings or variations
Make milestone payments
Protect delivered equipment, where agreed
Follow operating instructions
Report faults promptly
Maintain monitoring credentials
Arrange future maintenance

Customer Duties Should Be Reasonable and Specific: The contract should not transfer responsibility for the installer’s design, electrical work, workmanship or certification to the customer.

What Contract Questions Should You Ask Before Signing?

What is the exact legal name of the contracting company?
Does the company name match the quotation, invoice and bank account?
Who is the responsible RPVSP, where applicable?
Which registered electrical contractor will perform the work?
Which competent person will supervise or certify the installation?
What are the exact panel and inverter models?
What are the total DC and AC capacities?
Can any equipment be substituted without my written approval?
Which design and engineering services are included?
Which application services are included?
Which official fees are included?
Which technical-study costs are excluded?
Which roof repairs are excluded?
Which electrical upgrades are excluded?
Is scaffolding or lifting equipment included?
Who is responsible if the roof leaks?
How long is the workmanship warranty?
Does equipment warranty include replacement labour?
What project milestone triggers each payment?
Is any final payment retained until complete handover?
What happens if the application is rejected?
What happens if only a lower capacity is approved?
What happens if the specified equipment is unavailable?
What happens if the installer misses the agreed timeline?
Which documents will I receive at handover?
Will I receive permanent monitoring-owner access?
Who handles future warranty claims?
What are the cancellation and refund conditions?
How are disputes escalated?
Which terms continue after project completion?

Final Solar Installation Contract Checklist

Legal company identified
SSM details checked
Customer and property identified
Technical parties identified
Exact panel model stated
Exact inverter model stated
DC and AC capacity stated
System layout included
Complete scope listed
Exclusions listed
Application responsibility stated
Official fees stated
Technical-study responsibility stated
Roof condition recorded
Roof damage responsibility stated
Electrical responsibility stated
Payment milestones defined
Project timeline defined
Completion definition stated
Testing requirements listed
Handover documents listed
Workmanship warranty stated
Warranty labour stated
After-sales support stated
Variation procedure stated
Cancellation terms stated
Refund terms stated
Dispute procedure stated

What Is Solar100’s Role in Solar Contract Comparison?

Solar100

Supports solar-provider discovery
Helps customers organise initial project information
Supports initial quotation comparison
Helps identify differences in contract scope
Provides general contract-checklist information
Does not prepare legal or engineering documents
Does not approve or sign the installation contract
Does not guarantee contract performance

Selected Solar Provider

Assesss the property and electricity account
Prepares the project-specific quotation and contract
Defines the proposed system and equipment
Coordinates applicable applications and technical work
Performs or coordinates installation and commissioning
Provides the agreed warranties and after-sales support
Remains responsible for its written contractual commitments
Corrects applicable defects within the agreed scope

Frequently Asked Questions

What is the most important part of a solar installation contract?

The contract should clearly define the exact system, complete project scope, price, payment milestones, responsibilities, warranties, exclusions and remedies if the project does not proceed as expected.

Should the exact panel and inverter models be stated?

Yes. The manufacturer, exact model, quantity, capacity and applicable warranty should be written into the contract or a binding equipment schedule.

Should Solar ATAP application work be included in the contract?

The agreement should state whether the provider prepares and coordinates the applicable application, technical documents, testing records, contractor documents, forms, fees and follow-up work.

Should I pay the full solar price before installation?

Payment stages should generally follow documented project progress. Customers should understand what equipment, work, testing and handover must be completed before each payment becomes due.

Should roof-leak responsibility be written into the contract?

Yes. The agreement should distinguish existing roof defects from installation-related damage and define the coverage period, response process, repair responsibility and exclusions.

Does the equipment warranty automatically include labour?

No. Diagnosis, transport, roof access, removal and reinstallation may be excluded unless the contract provides specific labour coverage.

What happens if the approved system capacity is lower?

The contract should explain whether the design and price will be revised, whether the customer may cancel and which actual costs may be deducted.

What documents should I receive after installation?

Handover should normally include final drawings, equipment details, serial numbers, test and commissioning records, approvals, warranties, monitoring access, operating instructions and support contacts.

Can the installer replace equipment after I sign?

The contract should define when substitutions are allowed and require prior written customer approval for material changes to equipment, performance, compatibility or warranty.

Does Solar100 review or approve solar contracts?

Solar100 provides general provider-discovery and quotation-comparison support. It does not provide legal approval, engineering certification or a guarantee of contract performance.

The information on this page is provided for general educational and comparison purposes. It is not legal advice, contract drafting, engineering design, electrical certification, financial advice, application approval, installer endorsement, warranty approval or a guarantee of project completion, generation, savings, workmanship or dispute outcomes. Contract requirements, programme procedures, forms, official fees, registration status, licensing requirements, technical standards and utility processes may change and may differ according to the project. Customers should obtain the complete written agreement, verify the legal company and responsible technical parties, review current official requirements and seek independent legal or technical advice where appropriate. Solar100 is a provider-discovery and quotation-comparison platform. It is not the installer, electrical contractor, competent person, engineer, equipment manufacturer, warranty provider, electricity utility, regulator, lawyer, insurer, lender or approving authority and does not guarantee contractual performance, approval, equipment availability, warranty outcomes or after-sales service.

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