How to troubleshoot surface insulation resistance error on Hypontech HHT-5000?
- JJill RamirezAug 29, 2025
If the Hypontech Inverter shows a 'Surface insulation resistance error', and it happens occasionally, it may be due to a rainy or humid environment. The inverter should resume normal operation once the fault is eliminated. If there is a continuous alarm, check the PV array’s insulation to ground, ensuring it is greater than 200 kΩ. Also, visually inspect all PV cables and modules and ensure the grounding connection of the inverter is reliable. If all these checks are normal, further assistance is needed.







