Yes you should be concerned.
Victron have expressed multiple times that you should ensure that the voltage limit is never exceeded (meaning you need to factor for the worst/best case conditions - cold ambient temperature + full sun) and if it is exceeded, there is no/minimal buffer, so it can/will result in permanent damage to the MPPT.
Since you have already exceeded the limit once, it's very likely that it will happen again & it could be worse next time around...
Best to remove or reconfigure your panel(s) to decrease the max open circuit voltage.
Hi Dereck,
Are all of the panels the same spec?
One way of reducing the voltage in a PV system is by re-wiring the panels in parallel, in a series-parallel configuration. You'd want to ensure that you stay within the rating of each panel when doing this though (and that the 2 parallel strings are balanced - go for an even number of panels).
https://www.solarreviews.com/blog/do-you-wire-solar-panels-series-or-parallel
Regarding maximum voltage, here are some links with tools to determine the sizing of your system:
https://www.victronenergy.com/mppt-calculator
your issue is that you have an odd number! For 4 panels you would use panels paired in series and then the two pairs paralleled. If you have space, you could consider adding a 6th and having either 3 parrallel pairs of 2 or 2 parallel pairs of 3. Its that or you drop one.
