To high of voltage spike (470V) for Victron MPPT RS 450/100. How to reduce?

[MrSteve]

Hi all, question: How do i reduce the max PV voltage?



I have a ESS system running with a Multiplus 48/5000 and 48/100AH Lifepo4 battery,

the battery will upgraded to 280AH in the near future.

Parallel to the system i have an 3000W AC inverter (about 3600Wp on roof).

I would like to swap out the AC inverter for the MPPT RS 450/100.



Problem is, a couple times a year the voltage peak from the PV is about 465/470V!

I know this because i had an Chinees offgrid inverter for a year and got a couple alarms above the 450V mark. Like i said, only a couple of time but i know the 450V is a hard limit for the MPPT RS.

Besides disconnecting 1 PV panel (all in serries) to get the voltage down,

is there another way to control this peak voltage or "transform" it down somehow?

A device i do not know of?



I rather not dissconnect 1 PV panel as i live in a rental house,

altought i doubt new people will notice that in the future hahaha..



If the MPPT RS is not an option i might opt for a FRONIUS PRIMO on the AC 1 out of the Multi,

that way the high voltage would not be a problem and i still be "offgrid" with my PV.



Thanks for your advise on this!

Steve.

 

[OzSolar]

Besides disconnecting 1 PV panel (all in serries) to get the voltage down,

is there another way to control this peak voltage or "transform" it down somehow?

A device i do not know of?

Removing one panel is the only way I know of. This topic comes up often and I don't think anyone has ever offered a different solution.

 

[MrSteve]

Removing one panel is the only way I know of. This topic comes up often and I don't think anyone has ever offered a different solution.

Thanks for your reply.