FoxESS Community - Owners & Installers Forum

For the KH10 inverter:

• Max. Array Power (20,000Wp) refers to the maximum recommended total solar panel capacity that can be connected to the inverter.

• Max. Input Power (15,000W) refers to the maximum DC input power the inverter can actively process at one time.

This means you can oversize the PV array up to approximately 20kW of panels, which is common practice and helps improve generation during low irradiance conditions (morning, afternoon, cloudy weather, etc.).

However, the inverter output/input processing capability is still limited, so during peak solar conditions the inverter may clip or limit power above its maximum operating input/output range.

Please also ensure:

• MPPT voltage/current limits are respected

• String design complies with the inverter specifications

• Local grid regulations and installer guidelines are followed

The number of panels that can be installed per MPPT depends on the panel specifications, especially the panel voltage (Voc/Vmp) and current.

For the KH10 inverter, the key limits per MPPT are:

• Max DC voltage: 600V

• MPPT operating voltage range: 80–500V

• Max input current per MPPT: 16A

In most typical installations, this usually works out to approximately 8–12 panels per MPPT/string when using standard modern solar panels.

However, the exact number should always be calculated based on the specific panel model and local temperature conditions to ensure the voltage does not exceed inverter limits during cold weather.