How can i get the best out of my 250/100 with what i have?

[cabba (Ben)]

hi all hoping someone can help.
I need to work out how to get the best out of it without spending any more money if possible.
i have been running 6x 375w euener panels on my 250/100 controller but needing more i picked up 3x 430w longi’s on a great deal before realizing I’ve created myself the mixing panels headache.
question is can i run these panels together? i know its not ideal and i wont need all the panels but will i just lose efficiency on the longi’s as I’ve read somewhere or is it really a no no.
an answer to this and any advice on the best configuration would be so appreciated i cant tell you, this has been a nightmare.
its a 24v system on a boat
multiplus
cerbo gx
250/100 mppt
12x2v 500ah AGM batt
i also have a 40a EPever mppt currently not in use that could be added id necessary.

thank you
ben

[Ludo]

Well, the optimal voltages don’t seem too be very far apart, I’d try taking the 6 old panels in 3s2p, then take the 3 new ones to get a total of 3s3p.

But you’ll have to calculate if you remain under the max input current of your mppt