Following the introduction of our new External Transfer Switch solution for MultiPlus-II last year, we are pleased to announce that it is now certified for grid-connected applications in multiple countries.

This significantly expands the range of applications for this solution, including ESS.

Additionally, the kWh monitoring issue on VRM for this solution was resolved in the Venus OS v3.53 release.

Countries list: 

This solution has been tested and certified according to the following national grid codes:

• Germany – VDE-AR-N 4105:2018:11
• Europe – EN50549-1:2019
• Belgium – C10/11 ed 2.3
• UK – G99 Issue 1 Amd 10
• Northern Ireland – G99 Issue 1 Amd 1 (Dec 2023)
• Spain – UE2016/631 UNE217002:2020
• Denmark – TR3.3.1 Rev 5
• Austria – TOR Type A ver 1.3
• South Africa – NRS 097-2-1:2024
• Poland – PTPiREE Rev 1.2:2021

Please note that for Europe (EN50549), Germany (VDE4105) and South Africa (NRS097) the External Transfer Switch solution must be used in combination with the Ziehl relay UFR1001E. For other grid codes this is not required.

Detailed diagram and further information:

The detailed connection diagram is available for download here.

For more information on the MultiPlus-II External Transfer Switch solution, please refer to its manual. The manual will be updated shortly to reflect this new certification.