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andre12 avatar image
andre12 asked

MPPT search with Multiplus 2 48/5000 and Trina moduls

Hello !

I want to install one Multiplus 2 48/5000

with Trina TSM-400 DE09.08 Panels 400WP

should i use 12 panels 4800wp or 15 panels 6000wp

the direction is south west without any shade

with the 15 panels i could run 2 option's

3S5P 123V 46,9A with a 150/70 MPPT

15 Panels in 5S3P 206 V 28A with 250/60 MPPT

or is that better to install only 12 Panels !?

what should i add in the mppt caculator on this 2 points V Temp.-Koeff. [%/°C]

I Temp.-Koeff. [%/°C

the whole system is running later with 2 Pylontech, EM24 as a grid parallel island


thanks for your Help i'm doing that the first time :)


Bye Andre


Venus OS
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3 Answers
Mike Dorsett avatar image
Mike Dorsett answered ·

The number of PV modules you install is determined by how much energy you are using on a daily basis. Depending where you are, a 400W module will produce between 1 to 2 kWh per day. The temperature coefficients are on the module data sheet which you can get on line.

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andre12 avatar image
andre12 answered ·

I know that,

i'm searching the best way should i do 12 or 15 panels

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andre12 avatar image
andre12 answered ·

should i use the STC Data or the NOCT Data

i calculated for now with the STC Data https://mppt.victronenergy.com#djE7Y3VzdG9tLDMsNSw1NCwtMzAsNzAsNDgsMTEuNywwLjA0LDEyLjI4LDQwMCwzNC4yLC0wLjI1LDQxLjIsMTAsNg==


why is in the calcalation V at max Temp red ??

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