Building a 3000W Portable Solar Power Station

[pzado]

Hello,
I watched this video from Lithium Solar and ended up building one of my own. The following is my equipment:

EG4 3kW Off-Grid Inverter | 3000EHV-48 | 3000W Output | 5000W PV Input | 500 VOC Input
Trophy Battery 48V100E-2UL
2 x Bifacial 200 Watt Solar Panel 12V 10BB Monocrystalline Solar Panels High Efficiency Solar Module
2 x 200 Watt 12V Monocrystalline Solar Panel High Efficiency Module

I have ran the above configuration in both parallel and series. Due to being a DIY beginner my worry is that I am not sure if I am using the panels as they say they are 12V. Do I need to buy 48v panels?

Back to my issue. So I have come across in the Hand Truck Power Station video below is at the 12 minute mark you can see that he connects the positive to the negative terminal of the inverter and the negative to the positive. I have watched another YouTuber (Will) build a similar truck and while he doesn't specifically address this it seems from his video the positive is on the positive and negative is on the negative. Same for any other videos I try to find. When I connect my setup like Lithium Solar did I don't get any power from Solar Panels and worry I may have damaged my inverter. Any thoughts would be greatly appreciated.

The video is linked here: Hand Truck Power Station

 

[Mattb4]

I am not getting anything from your link. However regardless of any video out there. Follow proper wiring polarity! Your SCC terminals are labeled, and your operators manual should provide guidance.

Do you have a DMM? If so you should test your panels output to ensure that you have voltage.

 

[pzado]

Thank you for your reply. I just fixed the link. Yes I have other portable power stations that utilize solar and my array is definiely providing electricity. Needless to say the EG4 has a decent manual and suffice it to say, I agree the polarity should match polarity. If you don't mind, the video should work now and if you go to the 12 minute mark you can see where he gives an explanation of why it should be inverted. He has over 1 million views and seems highly qualified which is why I wanted to learn more about his reasoning. To your point, regardless of what he said, I am eseentially now trying to triage my issue.

 

[Mattb4]

His explanation is slightly flawed even though he says to double check the wiring for proper polarity. He should not have explained that the male MC4 was positive or negative as it confuses the issue. Yes the positive from the panel is by standard a male plug. To match this at the inverter you would need a female to plug into. The opposite for the negative at the inverter.

Plugs could be wired differently for male to female ends but the pos and neg from the panels must go to the pos and neg of the SCC terminals.

Edit: BTW do not fall into the notion that DC positive and negative is any indication for hot, ground or neutral such as AC has. Mobile application of DC will often ground the negative to the chassis of a vehicle but this is to simplify wiring requirements. Older DC systems used positive ground but this has fallen out of favor.

 

[pzado]

Thank you Matt. Due to my limited experience, I got easily confused. This is what I needed to hear. Appreciate you making it clear for me. You sir are why I always believe in paying it forward.

 

[LithiumSolar]

Sorry I wasn't very clear. As noted above, I was trying to point out that you should NOT follow the little + symbols on the connectors as that is relative to the solar panel, not the MPPT input. A male connector will only connect to a female connector.