As Singapore accelerates towards its Green Plan 2030 goals, solar energy adoption has seen exponential growth among both homeowners and commercial property owners. With over 10,000 residential installations completed in 2024 alone, it’s no longer a question of if you should go solar—but who should install your system.
Choosing the right solar company can determine whether your investment lasts 25 years with optimal efficiency or becomes a maintenance burden. In this guide, we profile 10 of the most reliable and reputable solar panel companies in Singapore, highlighting their specialties, technologies used, and what makes them stand out in a crowded market.
Why Solar Power Makes Sense in Singapore
Singapore receives an average annual solar irradiance of 1,580 kWh/m², ideal for photovoltaic (PV) systems. A well-placed rooftop system can generate between 1,100–1,400 kWh per kWp per year, making it possible to offset 30–100% of your monthly electricity consumption, depending on system size and usage profile.
In 2025, electricity tariffs from SP Group are hovering around S$0.32/kWh, meaning a 5 kWp solar system generating ~6,000 kWh annually can save you nearly S$1,920 per year.
How We Chose These Companies
Each company featured here meets at least four of the following criteria:
- Proven track record of 50+ solar installations
- Use of Tier-1 solar modules (certified by BloombergNEF)
- Engineering, procurement and construction (EPC) capabilities
- Transparent pricing and strong after-sales service
- Integration with SP Group’s ECIS scheme
- Registered with Singapore’s Energy Market Authority (EMA)
Let’s now explore the top performers in Singapore’s solar energy space.
1. First Solution Group – Best All-Rounder for Residential & Commercial Solar
Website: https://www.firstsolution.com.sg
Contact: +65 6844 0001
Office: 18 Kaki Bukit Road 3, Singapore 415978
Services: Residential, Commercial, Industrial, Government
With over a decade of experience and more than 500 completed installations, First Solution Group is one of Singapore’s most trusted solar engineering firms. What sets them apart is their turnkey EPC capability, which means the entire project—from site inspection to system activation—is handled in-house.
Key Features:
- Zero upfront installation options with performance guarantees
- SP Group meter integration and remote energy monitoring
- Roof tilt customisation between 5° to 10° for self-cleaning and optimal yield
- Premium panels from LONGi, Trina Solar, and inverters from Huawei and SolarEdge
- Optional upgrade packages: EV charging station + lithium-ion battery storage
Warranty & After-Sales:
- 25-year performance guarantee (linear degradation <0.5% annually)
- 10–12-year inverter warranty
- Lifetime workmanship warranty on mounting and cabling
Their engineering-first approach ensures optimised system sizing using solar simulation tools like PVsyst and Helioscope, along with real-time ROI estimations.
2. EDP Renewables (Sunseap) – Best for Large-Scale Commercial Solar
Website: https://www.edpr.com/en
Address: 23 Rochester Park, #05-00, Singapore 139234
Contact: +65 6816 1000
Services: Commercial, Industrial, Government
EDP Renewables (EDPR) is a global leader in utility-scale solar. After acquiring Sunseap in 2021, EDPR now manages over 2 GWp of solar projects across Asia, including several high-profile commercial installations in Singapore.
Signature Projects:
- 9.5 MWp solar array at Jurong Port (world’s largest port-based PV system)
- 2.4 MWp rooftop system for Ng Teng Fong General Hospital
- Floating solar R&D at Pasir Ris and Kranji reservoirs
Strengths:
- Strong financial backing for Power Purchase Agreements (PPAs)
- Scalable installation teams for projects >500 kWp
- Advanced weather-adjusted yield prediction tools
EDPR is the preferred partner for MNCs, developers, and REITs with large rooftop real estate or ESG reporting requirements.
3. Eigen Energy – Best for Clean-Tech and EV Integration
Website: https://www.eigen.energy
Contact: +65 6589 8601
Address: 100G Pasir Panjang Road #05-07, Singapore 118523
Services: Residential, Commercial, EV Charging
Eigen Energy is known for high-efficiency systems coupled with smart energy monitoring. Their focus is on digital performance dashboards, micro-inverter setups, and seamless integration with building energy management systems (BEMS).
Commercial Clients:
- DBS Bank, Shell, United World College SEA
- Solar panels on top of IKEA Alexandra
Technical Offerings:
- Microinverter systems from Enphase for modular shading-optimised layouts
- DC optimiser add-ons for complex roofs
- Battery-ready inverter pairing (SMA / Victron)
They’re a top choice for clients who want real-time energy intelligence, lower payback periods, and scalable green energy investments.
4. Sembcorp Solar – Pioneer in Utility and Floating Solar Systems
Website: https://www.sembcorp.com
Contact: +65 6723 3113
Email: utilities@sembcorp.com
Address: 30 Hill Street #05-04, Singapore 179360
Services: Commercial, Government, Infrastructure
Sembcorp is a veteran energy company with a renewable portfolio exceeding 2,600 MWp globally. They are the leading player in floating solar systems on Singapore’s reservoirs, in partnership with PUB and HDB.
Flagship Projects:
- 60 MWp floating solar farm on Tengah Reservoir
- 8.2 MWp rooftop system at Singapore Airlines HQ
- Industrial solar installations for Jurong Island clients
Sembcorp’s solar arm specialises in zero CapEx energy supply agreements (ESAs), making it ideal for businesses looking for hassle-free solar transitions.
5. 10 Degree Solar – Reliable & Affordable Residential Solutions
Website: https://www.10degreesolar.com
Contact: +65 9674 3974
Email: furqan@10degreesolar.com
Address: 56 Sembawang Road, #01-07, Singapore 779086
Services: Residential
For homeowners looking for a balance between affordability and reliability, 10 Degree Solar offers well-designed residential packages starting from 3 kWp. They partner with licensed electrical contractor JJ&K Engineering, ensuring every installation meets EMA and SP Group compliance.
Perks:
- 2-year defects liability period post-installation
- Optional EV charger add-ons and battery storage
- Modular panel layouts to accommodate skylights or irregular roof geometry
With personalised consultations and flexible component options, 10 Degree Solar is especially well-suited for first-time solar adopters in landed homes.
6. Cutech Green Ventures – Industrial-Grade Solar with Regional Experience
Website: https://cutechgreenventures.com
Contact: +65 6665 0187
Email: enquiry@cutechgroup.co
Address: 3 Soon Lee Street, #03-18 Pioneer Junction, Singapore 627606
Services: Commercial, Residential, Cross-Border Projects
Cutech is a regional engineering group with extensive project experience in Singapore, Malaysia, and India. Their solar division has deployed over 50,000 panels across 110+ projects, with a combined installed capacity exceeding 22 MWp in Singapore alone.
What They Offer:
- Strong value engineering for cost-conscious clients
- In-house design and engineering (reduces external mark-ups)
- Bilingual project teams for cross-border installations
They’re ideal for industrial facilities, logistics warehouses, and clients with regional operations requiring standardised solar integration across Southeast Asia.
7. Hao Solar – Agile Newcomer with Technological Depth
Website: https://www.haosolar.org
Contact: +65 8020 8530
Email: hugh@haosolar.org
Services: Residential, Commercial
Founded in 2023, Hao Solar is led by solar engineers and technicians with strong experience in retrofitting and integration. They focus on compact system designs for small to mid-sized rooftops and HDB-approved solar setups.
Notable Services:
- Custom panel mounting for irregular or L-shaped roofs
- PV + EV bundle packages
- Optional annual maintenance contracts with inverter inspection & thermal scanning
While newer, Hao Solar is earning a reputation for tight project execution timelines, useful for property developers and boutique hotels wanting low-disruption installations.
8. SunPro Energies – For Stylish Residential Solar with Functionality
Website: http://www.sunproenergies.com
Contact: +65 6612 5673
Email: info@sunproenergies.com
Address: Blk 18 Boon Lay Way, Tradehub 21 #02-109, Singapore 609966
Services: Residential, Commercial
SunPro specialises in both aesthetic design and technical performance, particularly for high-end landed homes and commercial buildings. Their solar canopies are especially popular among clients who want energy generation without sacrificing outdoor shade.
What Sets Them Apart:
- Rooftop + canopy hybrid systems
- Expertise in Ascendas Reit buildings & Ngee Ann City
- Customer education sessions and visual system dashboards
They also offer premium panel brands (REC, Panasonic) with low light performance optimisation, useful for east- and west-facing rooftops.
9. TotalEnergies Solar – Best for Corporate Energy Transition & Multi-Site Rollouts
Website: https://solar.totalenergies.asia
Contact: +65 6879 2200
Address: 182 Cecil Street, #27-01 Frasers Tower, Singapore 069547
Services: Commercial, Industrial, Oil & Gas
TotalEnergies focuses on large-scale energy transitions for industrial and commercial entities. Notable projects include:
- 1.2 MWp system at Total Lubricants plant in Tuas
- 543 kWp installation at Carros Centre, Singapore’s largest automotive hub
Why It Matters:
- ESG compliance alignment for public companies
- Smart energy metering integration across multiple facilities
- Structured PPAs with guaranteed energy savings models
They’re a great fit for MNCs, REITs, and logistics firms aiming to reduce Scope 2 emissions and improve building energy intensity scores.
10. Engie Southeast Asia – Best for Government & Healthcare Solar Solutions
Website: https://www.engie.com/en
Contact: +65 6513 8288
Email: enquiry.seasg@engie.com
Address: 108 Pasir Panjang Road #05-04, Golden Agri Plaza, Singapore 118535
Services: Commercial, Healthcare, Public Sector
Engie SEA, the regional arm of French utility giant Engie, brings with it global expertise in green building optimisation, combining solar with digital twin simulations and AI-driven performance monitoring.
Top Projects in Singapore:
- Rooftop PV for KK Women’s & Children’s Hospital
- Dual-terminal installation at Changi Airport T1 and T2
Ideal for:
- Public sector tenders
- Green Mark Platinum building upgrades
- Large campuses with remote energy monitoring needs
Solar Panel Cost, ROI & Maintenance in Singapore (2025)
Typical Residential System:
| System Size | Installation Cost (SGD) | Annual Output (kWh) | Savings/Year | Payback Period |
|---|---|---|---|---|
| 3 kWp | $6,000 – $7,000 | 3,600 – 4,000 | $1,200 – $1,300 | 5.5 – 6 years |
| 5 kWp | $10,000 – $12,000 | 6,000 – 7,000 | $1,900 – $2,200 | 5 – 6 years |
| 10 kWp | $18,000 – $22,000 | 12,000 – 14,000 | $3,800 – $4,500 | 4.5 – 5 years |
Maintenance Costs:
- Cleaning: Every 6–12 months (rain cleans most systems naturally)
- Inspection & Testing: $150–$250 per year (thermal scanning, DC testing)
- Inverter Replacement: ~Year 12, budget ~$1,500–$2,000
Depreciation & Financial Returns
Solar Panel Degradation:
- Linear degradation at 0.45–0.55% annually
- Output after 25 years: ~85% of original capacity
ROI Summary:
- IRR (internal rate of return): 12% – 16%
- Break-even in 5–6 years
- 25-year savings potential: $40,000–$70,000 depending on usage and export rates
Key Buyer Tips Before Signing Any Solar Contract
✅ Demand a Tier-1 Panel List: Ask for the brand, datasheet, and efficiency rating (>20% ideal)
✅ Check Licensing: Ensure they’re a licensed EMA contractor and have submitted SP Group documents
✅ Look for Monitoring: App-based performance dashboards like SolarEdge, Enphase Enlighten, or Huawei FusionSolar
✅ Confirm After-Sales Support: Ask about replacement timelines, system diagnostics, and warranty claim procedures
✅ Evaluate Roof Compatibility: Not all roofs are suitable—ask for a shadow analysis using solar mapping tools like PVsyst or Aurora Solar
Final Verdict
Going solar in Singapore in 2025 is one of the smartest financial and environmental decisions you can make. However, selecting a trusted, proven contractor is critical.
For most homeowners and businesses seeking a balance of affordability, technical depth, and full-service support, First Solution Group stands out as a top-tier choice.
✅ Get a Free Quote from First Solution Group Today
- No hidden fees, no pressure
- SP Group grid-ready solutions
- Battery storage and EV charger-ready options
- Performance guaranteed with lifetime workmanship warranty
📞 Call Now: +65 9855 6824
🌐 Website: https://www.firstsolution.com.sg
📍 Visit: 45 Kallang Pudding Road #09-02 Alpha Building, Singapore 349317