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John Rice avatar image
John Rice asked

New solar panels to my mppt 100/30

I have just replaced my 2 x 80 w panals with 2 x 250 w panals in parallel to my smart solar mppt 100/30. AT v max 22.85 VOLTS on a sunny day I am only receiving p max 258 watts . I believe it should be around 400 w. My system is attached to 3 x 120 amp/h AGM using 50 amp/h wiring What could be wrong?

mppt charging
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harold avatar image harold commented ·

Are the battery's already charged?
any loads, consuming power?


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2 Answers
ray-mont avatar image
ray-mont answered ·

Hi @John Rice

if your batteries are not empty

you will never get to 400 watt

i‘ve got 3 330 watt half cell panels

if the battery state of charge is 80%

I will get max 600 watt(victron app) around noon and the panels are on a 45 degree angel to south

at that time i was also using +-10 amp’s for the inverter


Greetings from a sunny Amsterdam

ray

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spirou avatar image
spirou answered ·

320Wp got me to 225W max a few days ago with all loads turned on, but a full battery.

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