Solar Panels - is more or bigger a better choice

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stevecounsell asked Jan 31, '19

Solar Panels - is more or bigger a better choice

I’m trying to decide whether to go for a single 200 watt panel or 2 X 100 watt pannels feeding into a Smart MPPT 100/30 charge controller, linking into 3 X 100Amh Yuasa EFB Batteries.

This is for a motorhome in constant use travelling mainly in UK, France and Spain.

I understand from other posts that 2 panels wired in series might be better than a single due to the panel output needing to be +5Vdc above the battery voltage.

Off course the confusion is that a single 200 watt panel is 24 volt while the 100 watt panels are 12 volt.

Solar Panel

2 |3000

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Answer 1 · 2019-01-31T12:49:40Z

JohnC answered · Jan 31, 2019 at 12:49 PM

Hi Steve. The panels you're talking are essentially the same thing. Like 2 halves making one whole. For you though with that cc & batts, a single 300-330 watter would be good too.. :)

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2 |3000

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stevecounsell commented · Jan 31, 2019 at 12:55 PM

So they’re essentially the same thing and no difference in charge output. I rather like the idea of a 300 watt panel. I’ll have a look at that :)

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JohnC ♦ stevecounsell commented · Jan 31, 2019 at 01:32 PM

No need to stop there either. A couple of 200's or 250's would help 'weather' poor days as well. You've plenty options, just get matched panels.

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