Field evaluation for mixed ESS system

[fandi]

Hello All,
There's an inverter connects to 1) grid tie main service panel, 2) solar PV panels and 3) Energy Storage System (ESS).
The inverter is UL1741, UL 1778 listed. The manufacturer diagram shows connections like mention above. Keep in mind that there's no specific ESS type mentioned other than the only requirement of ESS to be 48V.
The ESS is Lithium Ferro Phosphate (LFP) technology and UL1973 listed.
Solar PV panels is UL1703, UL2703 listed.
So basically each component of the system is listed individually.
Is there anywhere in UL9540 that requires third party field evaluation to make sure these individual components tested to work together?
Thanks.

 

[fandi]

From UL9540 scope:
1.1 ...The energy storage system shall be constructed either as one unitary complete piece of equipment or as matched assemblies, that when connected, form the system.....Individual parts (e.g. power conversion system, battery system, etc.) of an energy storage system are not considered an energy storage system on their own...

 

[fandi]

Or from 15.2
"Even when the major parts of the ESS are in compliance with their individual safety standards and they are being used within their ratings, it cannot be assumed that when the parts are connected together to form an ESS that the system is safe without further analysis. The analysis of the ESS must evaluate whether or not the various parts of the ESS, even though determined to be safe individually, work compatibly with each other to prevent hazardous conditions from occurring. When conducting this analysis, it is important that the interaction of the various parts of the ESS be evaluated as noted in 15.1 to determine that there are no hazards introduced in the system as a result of their interaction...."