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Do I need 2x20A of this?
I mean one for the 100/50 and one for the 100/30 MPPT or? -
How to connect this? Does it have two connections on its sides like the one I have now? I mean a black and red cable goes in on one side and a black and red cable comes out from the other side?
I am not sure I understand what do you mean… How would I do that?
The flat cable is a great idea. I have just put in it my basket on amazon.de.
I have a 3.5m cable like that. I bought it for my EcoFlow Delta 2.
If you do not want to do a fixed installation for the second MPPt for the solar curtain fix, due to space constraints, then you have to find a plug-able solution.
There you have three constraints and solutions:
- easy connect/disconnect → use other plugs than MC4
- ensure right polarity → use coded plugs
- do not mix up battery and PV connection → use different plug types or same type but different direction, e.g. XT60 for PV and XT90 for battery
I hope this helps.
Can breathe again 
Good morning to the north of Europe …
The DC isolators were just an example that there are also smaller, more compact enclosures than the huge one you are using … and your cables to the panels are already a bit too big for the small setup … but better to have and need less.
Of course, you have to adapt the current value of the isolators to the Mppt. 50 and 30 amps would normally be the maximum utilization of the modules … but we’ll have to calculate that again … There is never that much … so the fuse would have to be adjusted … only as large as necessary.
Yes, thank you. Will look into that deeper for sure. Would be nice to have a ‘mobile’ version for the connections.
Hehe…when was morning? I don’t even remember it.
The DC isolator that I have is 32A/1500V.
You could write this in chinese as well. I didn’t understand a single word. Maximum utilization of the modules…huh?
What fuse would have to be adjusted? DC isolator’s 32A fuse? The 40A fuse in the Lynx or what?
Are you torturing me?
Whattttt?
If your 4th module is on the roof, you have a 2x2 configuration … i.e. twice the current and twice the voltage of a module. There can never be more current flowing than 2 modules supply. Let’s take another look at the data sheet and then calculate x2 + a little winter reserve … which will probably never be achieved due to the roof construction.
The fuses don’t have to do more, even if the Mppt could.
I have illustrated this …
So 25A would be sufficient … the Mppt could handle 50A … it will never be able to achieve that with 2x2
For this reason, your lines are far too over-dimensioned. At 30A, 6mm would probably have been sufficient … and would have been easier to lay.
Got it.
Got it.
About the 4th panel on the roof…just to make it more complicated, it won’t be there where you put it on your drawing. It can’t be there because there is no place for that. I have a huge window there. The one and only place I can install it is here:
Before you mention, I know it’s not optimal to connect nr3 and nr4 in series due to their facing to the sun but I have no other option to do that so…
The problem with these small modules is always the Mppt + 5V issue, which you have already learned about.
The series connection is necessary to reach this point. That the arrangement is anything but optimal … I agree …
The clamping together is again “plague or cholera” … there is this saying in English …
I would even try one of the 90° roofs with a 45° front panel … as I said … the focus is on overcoming the 18V or so for the Mppt
Trial and error …
…what if nr5 would be the same panel just as the rest? I know it’s not a foldable version and need to check if it can fit behind my windshield as well. Bit it is somewhat flexible.
So what if nr4 and nr5 goes with the 100/30 MPPT? Both kinda a not fixed-version…just as @BjoernK mentioned.
(I’ve finally found how to tag people:+1:t2:)
Lol… Just saw it that we had the same thought at the same time about the possible connection between nr4 and nr5.
you must be able to stow it away … It would have to be a folding panel … and it would totally mess up the whole 2x2 arrangement.
In terms of light incidence, it would have to work together with the new front panel No.4 … But then the panel in the driver’s cab MUST always work with it …
Then we would be back to 1 x 3 on the roof in series and 1 x 2 in series (if plugged together) at the front … which would then always have to face south … A turntable for the vehicle would be great 
Haha…back to square one.
Not sure which is the best and most optimal combination in my case. I am open for all ideas.
Now I understand the topic …
This is now the “Yummi Stuff”
There is no such thing as an ideal … If the “getaway vehicle” will continue to be in Northern Europe. Towards the equator, of course, it will be better for the roof panels.
It’s best to stick with 2x2 on the roof, each with 1x90° roof + 45° front … that would probably be the most balanced.
And your folding panel really only as an addition …
Okay. And panel nr5 alone can manage the 100/30 mppt?
That´s a … YES
No.5 … as folding Panel has more Voltage … around 40V but less Current …
Okay. Now just need to find the optimal sized foldable solar panel with good performance behind the windshield. Any suggestion? The one you’ve sent somewhere above?
1Leftdoor — 3Frontshild — 1Rightdoor …
its 56cm hight … 243cm widht
and offers Sunprotection 
Need to see test videos. Max power, how it’s managing heat, partial shade, etc. Do you have any link maybe?
unfortunately I don’t have anything with me
There will probably be few test videos …
“Don’t think … just do” 