PWM Controller

Question

question

phil-fouracre asked Aug 12, '21

I think I’m slightly out of my depth looking through some of the discussions on here!!

I converted a camper a while ago and then decided to fit a ‘simple’ solar system

I installed one 100w panel and a 20amp Victron PWM controller which has worked well, but was planning to ‘improve’ the performance

I’ve now got a second identical panel to add, but, am slightly confused as I’ve been told that I can wire it in series or parallel!

I was told that the controller would allow this, but, is this correct if I wire in series and then have 24volts to it?

Any pointers would be very helpful

Many thanks

Phil

charge controller compatibility

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Answer 1 · 2021-08-12T08:11:11Z

Matthias Lange - DE answered · Aug 12, 2021 at 08:11 AM

From the manual:

With a PWM charge controller the panel voltage have to match the battery voltage.

If you switch to a MPPT charger you can wire the panels in series and benefit from a higher efficiency (up to 30% more).

1628755559286.png (34.4 KiB)

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