Multiplus in parallel, which is which?

Q&A and troubleshooting
, , ,
1

Having gone through the Multiplus II manual, I don’t seem to find any mention of how to manage the order of two Multiplus in parallel.

  1. How do I know which one is Nº 1 and which is Nº2

  2. How do I swap the order of them to my needs?

Thanks

Thanks

2

In the System Configurator too … click on the Unit and Identify … via flash Leds

3

I was under the understanding that the one flashing was Nº2, is that not correct?

4

In a parallel configuration number 1 is the master and number two is the slave . The master led is fixed in Inverting (or mains if in passtrough) while the slave has the leds mains and inverting blinking alternately .

5

That is what I understood so why when I attempt to use the charger the system stops and returns this error message?
Slave does not have an AC input
I was under the understanding that, when in parallel, only one Multiplus can be used for charging so I didn’t bother connecting AC to the second one.
What is the point of connecting the AC input on the second Multi if it can’t be used for charging?

6

Units in Parallel also need all the same connections … including the Grid Connection … you can use both as chargers … maybe with a reduced charged current …
But you have to take all the same cables … in leght and diameter

7

I sure did but I was advised that only one charger could be used so I didn’t connect AC to the second unit.
I shall do that tomorrow and check that the charger works.
Thanks Again.

8

Yes … in your configuration it would be more important to take a look at the DC Cables … :wink:

9

That seems to go against other opinions, according to most the AC is the one the one that accounts for the load resistance.
However, when I installed the second Multy I replaced all DC and DC cables to make them equal.
10mm for DC and 70mm for AC all equal length.