🔋 Always On Energy Solar education on Sigenergy Inverters.
- cobus063
- Oct 1
- 1 min read
How the Sigenergy Hybrid Inverter Handles Heat—and Why It Matters for Your Solar Investment in Johannesburg
The long summers in Johannesburg South Africa regularly hits 38°C, and that’s more than just a comfort issue—it directly affects your solar inverter’s performance.
🌡️ Temperature Derating Explained
The Sigenergy 10kW Hybrid Inverter delivers full rated power up to an ambient temperature of 30°C. Beyond this point, it begins to derate, meaning it reduces output to protect internal components. At 38°C, typical for our summer highs, expect a ~5–10% drop in maximum output—so your 10kW inverter may only deliver around 9.0–9.5kW.
💨 Cooling System:
Active, Not Passive Unlike simpler designs, the Sigenergy inverter uses active cooling—integrated fans and thermal management—to maintain safe operating temperatures. This helps delay derating and extend component life.
Making sure the environment is the best for your Inverter installation position and airflow.
🛡️ Breaker Sizing for Longevity
To protect your inverter and ensure long-term reliability, use a 40 A main circuit breaker for a 10kW unit. Always On Energy recommends Managing your loading around 40 Amps maximum in Johannesburg.
📍 Why It Matters
Educated solar planning isn’t just about panel count—it’s about understanding how heat, hardware, and protection interact. Johannesburg’s climate demands smart inverter selection and proper electrical design to ensure your system performs year-round.
Let’s build solar systems that last—because reliability is the real ROI.
Next: Comparing these inverters against PV Solar Voltage inputs, User friendliness, Backup Battery Voltages, Off Grid suitability, Output wiring sizes for low temperature.
Please send any questions about Solar Systems to cobus@alwaysonenergy.co.za
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