Thermal Challenges in PV Inverter Cabinets
Central PV inverters dissipate significant heat from IGBT modules, DC-link capacitors and reactors—typically 2%–3% of rated power. In sealed cabinets summer temperatures exceed 60°C, far above the allowable junction temperature, so active cooling is required.
Selection Criteria
Required cooling capacity is estimated from total internal heat loss plus envelope gain, with a 20% margin. Outdoor units need IP54 protection and C3+ anti-corrosion; the compressor must support high ambient operation (condensing temperature up to 60°C).
| Parameter | Recommendation |
|---|---|
| Capacity | P_loss × 1.2 |
| Protection | IP54 |
| Supply | AC 230V / DC 48V |
Operation Tips
- Set return-air temperature 35–45°C to avoid short cycling
- Clean condenser fins regularly for summer heat
- Add high-temperature alarm and EC fan speed control
View HCK cabinet air conditioner products or contact Haocheng Industrial Control for a selection plan.