Have at the moment 2 x 200W Renogy solar panels installed in parallel with a 100/30 MPPT. I’ve decided to add one more of the same, so in total 3 x 200W. My question is do I need to change the (already made) parallel connection of the 2 x 200W solar panel to a single connection and then connect th…

Can wonderwoman drill holes in motorhomes? She shoots right through the superstructure … a catastrophe Of course it does … The PV cables are much, much thinner … I estimate 4mm Only the junction boxes for 16mm are much too big … a 16mm cable will olso fix into this smaller DC Isolator … i think u…

Yes, it’s kinda big diameter. But why exactly do I need another box? What is the problem with the one that I have now? You lost me…:face_with_spiral_eyes:

[image] Steffen: Can wonderwoman drill holes in motorhomes? She shoots right through the superstructure … a catastrophe I am sure she would say at this point where are now: …ck it!:smile:

I have no idea how you drilled where out of the vehicle and whether you have all the connections on the vehicle … You don’t have to replace anything … but if you have to lay new lines … they may be smaller. Leave everything else as it is … The main thing is that it is watertight when it rains …

With installing on the roof one more panel it just needs some extra wire organizing…on the roof. Not in the car. That’s fine with me.:+1:t2::slightly_smiling_face: A 150/30 MPPT is needed, but the question is that the DC isolator that I have (32A) is compatible with all the 4 panels in series?

Sure 32A is more than 15A … But it could be smaller to have a place for the new Mppt 100/30 …

Yeah. But if a new smaller DC isolator can’t handle my 16mm2 cable then then I’d rather find some place for the ‘old’ MPPT than re-do the cables in the car.

Not enough space in the small curtain room :sweat_smile: You’ll manage that … :relieved: This DC Isolator for example can handle 16mm for sure … [image] PV-DC-Schalter, DC500V PV-DC-Trennschalter Feine Verarbeitung Sichere... PV-DC-Schalter, DC500V PV-DC-Trennschalter Feine Verarbeitu…

We need the higher voltage of the modules in series so that the necessary Mppt voltage is available as early as possible with this poor alignment. The whole thing is not great, I agree with you. It’s just a motorhome roof and space is at a premium

[image] Steffen: Not enough space in the small curtain room Curtain room…I like this name.:joy: Of course there is space there! But for other stuffs. Like another LPG bottle.:stuck_out_tongue_winking_eye::smile: I will manage that.:stuck_out_tongue_closed_eyes::stuck_out_tongue_closed_eyes:…

Parallel/parallel connection, night time voltage dropping and other yummy stuffs😵‍💫

DIY

toffifee 31 October 2024 17:47 170

Hello…huh??? Don’t mix everything up…I finally understand some parts of Steffens explanations.

Choosing a charge controller

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Parallel/parallel connection, night time voltage dropping and other yummy stuffs😵‍💫

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