question

endy avatar image

450 watts with SmartSolar MPPT 100/30?

450 watt solar on 12v system with the VICTRON SmartSolar MPPT 100/30 or 100/50?

I would save $130 with the 30 over the 50 and considering I have no income in the foreseeable future thats appealing haha.

The manual says up to 440 watts with the 30 but I have seen places selling it list up to 450 watts. I have 3 x 150 watt panels for my new system and right now just a Renogy 30 that does 400 watt so need something but can't spend a lot.


400Ah (2 x Renogy 12v Deep Cycle Batteries)

450 Watt Solar (3x150) - the most I can fit mounted on my van roof, I will NOT be expanding to more panels. https://www.amazon.com/gp/product/B07WV6P4BT/ref=ox_sc_act_title_3?smid=AV16HZDTPF1LD&psc=1

W/ Wirthco Battery Isolator adding power also


chargercharge controller compatibilitycharge current limit
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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

What system voltage do you have?

@12V you can get around 430W charging power(!)

@24V ~ 860W

Charging power ≠ PV power

You can install more PV power as long as you don't extend the maximum PV input voltage (100V) or the maximum short circuit current (35A/60A)

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My system is 12v, sorry for forgetting. Someone else said to me since I am flat mounting the panels I will lose 10-15% efficiency so my input already is already only ~400watt max.

400Ah (2 x Renogy Deep Cycle Batteries)

450 Watt Solar (3x150) - the most I can fit mounted on my van roof, I will NOT be expanding to more panels. https://www.amazon.com/gp/product/B07WV6P4BT/ref=ox_sc_act_title_3?smid=AV16HZDTPF1LD&psc=1

W/ Wirthco Battery Isolator adding power also