10 Best Solar Companies Malaysia 2026 — How to Choose the Right Installer

With over 800 registered solar companies in Malaysia, choosing the right one is the most important decision in your solar journey. A bad installation can void your roof warranty, cause electrical fires, and result in a system that underperforms by 20–30% for 25 years. A great installer, on the other hand, delivers a system that performs as promised and backs it up with responsive after-sales service.

This guide explains the exact criteria to use when evaluating a solar company in Malaysia — and gives you a transparent view of how major installers compare.

The 7 Non-Negotiable Criteria for Choosing a Solar Company

1. SEDA RPVSP Registration (Mandatory)

SEDA (Sustainable Energy Development Authority) maintains a registry of Registered PV Service Providers (RPVSP). Only RPVSP-registered companies can submit Solar ATAP applications to TNB on your behalf. Without this, your system cannot legally export to the grid. Verify any company's RPVSP status at seda.gov.my before signing anything.

2. Workmanship Warranty (Minimum 5 Years)

The panel manufacturer's 25-year warranty only covers panel defects — it does NOT cover installation quality. The workmanship warranty covers roof penetration waterproofing, cable connections, mounting integrity, and inverter installation quality. A 1-year workmanship warranty is a red flag. Reputable companies offer 5–10 years.

3. Component Brands (Panels + Inverter)

This is where the real quality difference lies. Always ask for the exact model numbers of panels and inverter. The gold standard combination for residential Malaysia 2026:

• Panels: Jinko Tiger Neo, LONGi Hi-MO 6/7, Trina Vertex S+ (all Bloomberg Tier 1)
• Inverter: Huawei SUN2000, Solis, Sungrow SG series (all with 10-year warranty and local service centres)

4. CIDB-Certified Installation Crew

CIDB (Construction Industry Development Board) Green Card certification means installers have completed safety training for working at heights and electrical installations. Always ask whether the crew performing your installation — not just the company — holds valid CIDB Green Cards.

5. Post-Installation Monitoring Support

Your system should generate data every day for 25 years. A good solar company will set up remote monitoring (Huawei FusionSolar, SolarEdge mySolarEdge, or Solis Cloud) and be able to diagnose performance issues remotely. Ask whether they offer monitoring alerts and regular performance reports.

6. TNB & SEDA Application Handling

The Solar ATAP application process involves multiple government agencies and can take 6–12 weeks. A professional installer handles this entirely on your behalf. Be wary of companies that leave this to you.

7. Transparent, Itemised Pricing

Any reputable company should be able to provide a fully itemised quotation showing the exact model, quantity, and unit price for every component. Vague "lump sum" quotes are a red flag. Compare apples to apples.

Overview of Major Solar Companies in Malaysia

Below is an objective overview of major solar companies in Malaysia. Note: Trexon is included as this is our blog — we've tried to be objective, but you should do your own due diligence.

Red Flags: When to Walk Away

These are warning signs that a solar company may not be trustworthy:

• Cannot show SEDA RPVSP registration number — this is a legal requirement, not optional.
• Unusually low price (below RM 3,000/kWp for a full system) — almost always means inferior components, unlicensed labour, or no workmanship warranty.
• No itemised quotation — if they can't tell you exactly which panel and inverter model they're installing, walk away.
• Pressure tactics — legitimate solar companies don't need “today only” pricing. Installation queues are 4–8 weeks anyway.
• No physical office or registered address — fly-by-night operations disappear after installation, leaving you with no warranty support.
• Cash-only payment requests — reputable companies issue proper invoices and accept bank transfers or financing.

Why Trexon Energy is Different

Trexon was built as a digital-first solar company specifically because the traditional solar buying experience in Malaysia is broken — opaque pricing, slow manual proposals, and poor after-sales transparency. Here's what sets us apart:

• AI-generated proposals: Our system produces a detailed production simulation and savings projection within minutes — not days. Every proposal includes shading analysis, energy balance charts, and 25-year cash flow modelling.
• Transparent online pricing: Our pricing page shows itemised package prices. No hidden fees. No surprises at signing.
• Quality-first components: We use Jinko Tiger Neo panels and Huawei SUN2000 inverters for all residential installations. No substitutions without written consent.
• 5-year workmanship warranty: Covers all installation quality issues — roof penetrations, cable connections, inverter mounting, and commissioning.
• Customer portal: Real-time monitoring via the Huawei FusionSolar app integrated with your Trexon account — see daily generation, savings, and export history.
• Full TNB/SEDA handling: We manage all paperwork, site inspections, and application submissions so you don't have to.

Ready to see what Trexon can do for your home? Use our savings calculator to get a personalised proposal in 60 seconds. For a broader comparison of all major players, see our Top 10 Solar Companies Malaysia 2026 ranking. Wondering about cost? Our guide to solar panel costs for houses covers real-world scenarios for every house type.