Received an Error Message: R563 Short Circuit Current and DC Converter

Error Message Received:

Typical Causation:

These errors are caused by the short circuit current (Isc) of your PV module, when adjusted for the site's average high temperature, exceeds the maximum input current allowed by the DC-DC converter or power optimizer. This then makes the module Isc too large for the converter to handle. 

The calculation for this section is the solar module's short circuit current at standard test conditions (ISC) multiplied by 1.25 (NEC Article 690.8). If the dropdown input for "is the solar module bifacial was answered "yes", there is an additional multiplier of 1.3. Therefore, the equation(s) look like this:

ISC x 1.25 = non-bifacial solar modules

ISC x 1.25 x 1.3 = bifacial solar modules

If the final value is larger than the Maximum input (Isc) of the DC-DC converter then one of the errors will be triggered. 

An Example:

The following example is with Lunar Maximizer with a non-bifacial module before applying a high-temperature correction. 

Explanation:

After the high temperature correction calculation the adjusted module Isc is 17.34 amps which is greater than the maximum Isc of the converter that has a value of 15 amps. 

Potential Solution:

As a solution, a different module can be used that has a smaller (Isc) that is compatible and does not exceed the maximum (Isc) of the converter.