Temperatures in loft spaces can be high in summer months, things to consider:
The ambient temperature should be below 40 °C to ensure optimal operation. (Inverter will reduce power to protect components from overheating) (derating)
Observe the minimum clearances to walls, other inverters, or objects as shown in the Manual in order to ensure sufficient heat dissipation.
If necessary, increase the clearance spaces and make sure there is enough ventilation to ensure sufficient cooling of the Inverters.