There is full sunlight at the moment. (Autumn low angle sunlight) I keep my eye on it and itâs not going above 150W at all. Sidenote: the sun is reaching only 2 panels in 45° or so, the 3rd, single panelâs 90% is in the shadows.
If this chart is true then my battery is definitely not on 73% with 13.49V. More like 92-95%. Am I right?
That will depend on if youâre battery is under load (and how much load), i see the chart is for a battery thatâs not under load (resting voltage) SOC cannot be calculated by voltages alone. (note the charging voltages)
Have a read of this below.
https://www.victronenergy.com/media/pg/SmartShunt/en/operation.html
@toffifee
if you have two MPPTs I would suggest using both, each with two panels.
There are two version of Renogy 200W panels: 20V and 38V.
I would put 38V panels in parallel for better shadow performance and 20V panels in series.â, higher start voltage.
I wouldnât take much notice of that chart. The SOC of LFP batteries is difficult to judge by voltage alone.
No, thatâs not gonna happen, because itâs an RV so no place for that in my storage area. And no willing to drill more, using more cables, no more extra weight, etc. Will go with the bigger MPPT as soon as it arrives and maybe (not 100% decided yet) buying another of the same panels. And thatâs it.
Done reading it. But understand very few of this.
I understand.
There is lots to learn best to do it in small bitâs that way most will stick. For now get to know how you MPPT workâs and understand all the stages of charging ect then as you need to you will pick-up the rest, it will take a bit of time but you will learn and more importantly understand.
Lots of good people here always willing to help.
Good luck 
If you want your SOC values to be approximately correct, the values in the shunt must be entered correctly. With the winter sun at the moment, you will hardly get any full charge phases anyway. But these would be important for your shunt to synchronize to 100%.
A little adjustment is still necessary and other yummi stuffs 
Are the shunt and Mppt connected in the Smart Network or do they both work alone?
Yes, a super smart team is helping me out here and everyone is very patient. I am very thankful for this.
However I am very much a handly-woman I know itâs not easy to push some info to a womanâs head who has lack of knowledge of any kind of electrical stuffs. But I am trying my best without any physical help around. It was a stupid mistake that Iâve made to install the cables in the wrong way on my SmartShunt.
(For this discovery the award goes to ⊠
⊠Steffen )
I hope that no more mistakes will pop up.
Donât really understand (yet) those voltages, ampers and watts but I did everything alone and this is not an easy task to do. I collected the infos from the net, tried to learn everything that I had to learn to understand what I am doing (for example it took 2 weeks just to learn about the right thicknes and types of the cables), then I calculated my system, built it and made it workâŠeven if I did this mistake with the SmartShuntâs wrong cable connection, I am still very proud of myself.
2 Likes
Thanks ⊠but now ⊠the blue lights are 
You could, for example, place a foldable solar cell behind the windshield as sun protection if the vehicle is standing around anyway.
thatâs 45° and a small + of solar power in the winter sun âŠ
Yes they work together. Yesterday I deleted my precvious network but today after I turned the SmartShunt around Iâve connected them into a network again.
The battery was never charged by me. I donât know what was its voltage originally. Itâs new and just realized today that the factory suggests to charge it to 100% BEFORE the first installation. Not sure what to do with this info because itâs already installed.
What will come next are the low outside temperatures below 5°C ⊠also in Denmark.
Then your battery will stop charging because the BMS blocks ⊠even if the sun is shining ⊠even the little curtain wonât help. It simply gets too cold in the storage compartment.
Looove this idea! Will do that.
However I donât love that youâve just spent my money with this idea.
ButâŠhow the hell to connect it to my system?
Through the unused part of my DC isolator maybe? A cable from the front windshield to the DC isolator 
to the MPPT to the Lynx distributor to the battery? Or how?
That depends ⊠the best would be a small separate Mppt that would also be in the SmartNetwork ⊠which is only supplied by the solar cell ⊠there are many different versions.
The car is heated 24/7. I hope that the storage compartment wonât reach 5°. The curtain is for the curious eyes. You all know that a system like this costs of a half pair of kidneys. I donât want them to see it.
a half pair of kidneys ⊠is 1 kidney âŠ
How is the car heated 24/7?
We can agree on that.
A 2kW Diesel heater. Iâve just installed it few weeks ago. Best solution ever. Cheap and if you connect it on the right heating pipes in the RV then it heats up the warm water tank in the Truma as well. And the diesel heater doing it without using Truma itself or using gas.
Sounds like a runaway vehicle ⊠
Hide the location ⊠and continued success âŠ