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timarnold avatar image
timarnold asked

Blue solar 75/10 on 2 x 100 watt panels OK or Not?

I apologise if this has been covered many times but I am new to this solar lark!
I have a 100watt Renogy panel and a Blue Solar 75/10 charging a flooded 12 volt 100 mah Leisure Battery which powers 4G cctv cameras in a very remote location. The system is has just about held its own during November but with darker days and colder weather coming I doubt it will manage. I have been offered another new Renogy 100 watt panel at a huge discount, 50% off, which I can mount next to the existing panel. so my question is what is the best way to connect these 2 panels, parallel or series and will this controller manage which ever way I connect the panels even in the hight of summer or will I need to remove one in the summer months. Thanks in advance.

MPPT Controllers
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2 Answers
mjs500 avatar image
mjs500 answered ·

if your Renogy 100 watt panels have voc 24.3 v----- and iso 5.21A and vmp 20.4 v -------imp is 4.91 A Victron Mppt Calcutator start with 75/15 mppt for 12v battery charging 2 panels, in series

link below

https://mppt.victronenergy.com#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timarnold avatar image timarnold commented ·
Thank you. So if I keep the 75/10 and wire in parallel will that still work for me? The present controller is only 3 weeks old and I really don’t want to fork out another £70
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regman54 avatar image
regman54 answered ·

Similar to yourself I'm using two suitcase style Renogy 100 watt panels wired in series with a Victron 75/15 MPPT charge controller but on a travel trailer for dry camping purposes. As stated a minimum you'll need is a 75/15.

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timarnold avatar image timarnold commented ·
Thank you for the answer. I have now installed the 75/15. I cannot get any charge data from the battery supplier or manufacturers and as we know Victron do not supply flooded lead acid batteries so they dont have a pre set for that type of battery. Can I ask what settings you are using please@?
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kevgermany avatar image kevgermany ♦♦ timarnold commented ·
Absorption 14.4, float 13.7 will work fine
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