• Multiplus II Inverters

  How to connect the AC input and outputs for the MultiPlus-II 230V?

  Posted by Grippe on January 15, 2024 at 4:40 am

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  I have a MultiPlus-II 230V and need some guidance on how to properly connect the AC input and outputs without making any mistakes. Can you outline the steps for me?

  Arannis replied 5 months, 2 weeks ago 2 Members · 1 Reply
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  Arannis

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  January 15, 2024 at 5:20 am

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  It’s important to connect your AC input and outputs correctly to ensure the MultiPlus-II 230V functions safely and effectively.

  Here’s how to do it:

  Identifying AC Terminal Blocks:

  • Locate the AC terminal blocks on the printed circuit board. You’ll find these detailed in Appendix A of the manual.

  AC Input Connection (‘AC-in’):

  • Connect the AC input cable to the terminal block labeled ‘AC-in’.

  • Connect the wires from left to right in the order of “N” for Neutral, “PE” for Protective Earth, and “L” for Phase.

  • Ensure not to invert the neutral and phase wires when making these connections.

  AC Input Protection: The AC input must be protected by a correctly rated fuse or magnetic circuit breaker:

  • 32 A for the 3 kVA model

  • 50 A for the 5 kVA model

  • 100 A for the 8 kVA and 10 kVA models

  • Size the cable cross-section accordingly, and if your input AC supply is rated lower, downsize the fuse or circuit breaker to match.

  AC Output Connection (‘AC-out-1’):

  • The AC output cable can be directly connected to the terminal block ‘AC-out’.

  • Connect the wires from left to right in the order of “N” for Neutral, “PE” for Protective Earth, and “L” for Phase.

  • Include an earth leakage circuit breaker and a fuse or circuit breaker rated for the expected load in series with the output.

  • Size the cable cross-section to accommodate the potential combined output of up to 45 A (the sum of a 32 A input current and a 13 A contribution from PowerAssist).

  AC Secondary Output (‘AC-out-2’):

  • This output is used for loads that should only operate when AC power is available on ‘AC-in-1’, such as electric boilers or air conditioners.

  • Connect the secondary loads to ‘AC-out-2’.

  • These loads will be disconnected during battery operation and reconnected after a 2-minute delay once AC power is restored on ‘AC-in-1’ to allow any generator to stabilize.

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