Buying Solar Panels for the Middle East & Southeast Asia: Heat Performance, Certifications & Logistics
How to choose solar panels for hot climates: temperature coefficient of HJT vs PERC vs TOPCon, GCC and ASEAN certifications (SASO, ESMA, SIRIM, SNI), and logistics for the Middle East and Southeast Asia.
In the Heat, Watts Lie
In the Middle East and much of Southeast Asia, panels sit on rooftops at 60-75°C for hours. At those temperatures the temperature coefficient matters more than the nameplate number. A higher-watt panel with a worse coefficient can deliver less real energy per year than a slightly lower-watt panel that stays cooler-efficient.
Cell Technology and Heat
Lower (better) temperature coefficient = less output loss when hot:
- HJT: about -0.24% to -0.26% per °C — best in heat.
- TOPCon: about -0.29% to -0.34% per °C.
- PERC: about -0.34% to -0.40% per °C.
At a 70°C cell temperature, HJT loses roughly 11% versus STC while PERC loses around 16-18%. Over 25 years on a 1MW system in a hot climate, that gap is hundreds of thousands of kWh. For desert and tropical installs, HJT or quality TOPCon is the rational choice, not the cheapest PERC.
Certifications by Region
| Market | Key requirements |
|---|---|
| Saudi Arabia | SASO (IEC 61215/61730), SIRC registration for grid connect |
| UAE | ESMA / ECAS, G-Mark; DEWA approval in Dubai |
| Other GCC | IEC 61215/61730 + G-Mark commonly required |
| Malaysia | SIRIM, IEC 61215/61730, ST |
| Indonesia | SNI certification (local standard) |
| Philippines | PS / ICC from DTI-BPS, IEC standards |
| Thailand | TISI, IEC 61215/61730 |
| Vietnam | IEC 61215/61730; verify current EVN/MOIT rules |
As always, request the original certificate with the lab verification number and confirm it matches the imported model.
Logistics
- Middle East: Jebel Ali (Dubai) is the regional hub; also Dammam, Jeddah.
- Southeast Asia: Port Klang / Tanjung Pelepas (Malaysia), Tanjung Priok (Jakarta), Laem Chabang (Thailand), Cai Mep (Vietnam), Manila.
Transit from China is short (3-10 days), but heat during storage matters: avoid leaving pallets baking in a yard. Specify container stuffing and palletizing that protects edges, since transit handling — not just the sun — causes the micro-cracks that later show up as output loss.
What to Specify in the Contract
- Cell technology and temperature coefficient (demand the lower value in writing).
- Positive power tolerance.
- The exact certification for your destination market.
- Pre-shipment EL + flash test of your batch.
For hot-climate specification help, see our TOPCon vs PERC buyer's guide and the desert performance guide.
Frequently Asked Questions
Which solar panel performs best in Middle East heat?
HJT cells have the lowest temperature coefficient (about -0.24% to -0.26% per °C), outperforming TOPCon and PERC in hot climates. At 70°C cell temperature HJT loses roughly 11% versus STC while PERC loses 16-18%, a large cumulative yield gap over 25 years.
What certifications are required for solar panels in the GCC?
Saudi Arabia requires SASO (IEC 61215/61730) with SIRC registration; the UAE requires ESMA/ECAS, G-Mark and DEWA approval in Dubai. Other GCC states commonly require IEC 61215/61730 plus G-Mark.
What solar certifications does Southeast Asia require?
Malaysia requires SIRIM; Indonesia requires SNI; the Philippines requires PS/ICC from DTI-BPS; Thailand requires TISI; Vietnam requires IEC 61215/61730. Always confirm the current national rules before shipping.
Does temperature really affect solar panel output that much?
Yes. Rated watts are at 25°C; field cells run 60-75°C. With a typical PERC coefficient near -0.38%/°C, a panel loses 13-18% at 65-70°C. In hot markets the temperature coefficient matters more than the nameplate number.
How should solar panels be shipped to hot climates?
Use Jebel Ali for the Middle East and Port Klang/Tanjung Priok/Laem Chabang/Cai Mep/Manila for Southeast Asia. Avoid long sun exposure of pallets in yards, and specify edge-protective palletizing since transit handling causes micro-cracks that later reduce output.