1 Layer is enought …
Hvis du har dette, og det er koldt udenfor …
Sæt dig på den … så vil du straks bemærke, hvor varmt det bliver … det er derfor, 1 lag er nok
If you have this and it’s cold outside …
Sit on it … then you’ll immediately notice how warm it gets … that’s why 1 layer is enough
Will try.
But I won’t sit in the small curtain room to test it.
I feel like a kid in the elementary school where the teacher needs to see and know everything but the kids don’t care and tiny paper-balls with messages areflying behind her back across the classroom back and forth.
Face to the board …
QuestionMy battery was for the most of the day around 13.35V. Why?
I started with 13.5V in the morning, did not have any load on the system. It went down (for whatever reason was that) then it reached the 13.35V and it did nor move from there at all. It says my battery is on 100% (I doubt it) and both my mppt and the smartshunt has the factory settings on my phone. My LiTime battery specification book mention 14.4V as charged voltage. What does it mean to me compared to the 13.35V that seem stucked and the battery is not going over this voltage? This first day when I installed it to the system it was on 14.1V. (I didn’t charge it before the installation to 14.4V - as the manufacturer said to do - because I forgot to do it 
)
Do I need to change the settings? If so, where? On the MPPT settings?
Teaching continues … 
Why don’t you show your Mppt and Smartshunt settings
The Smartshunt settings are then important so that the SOC history is displayed correctly. Since you have a SmartNetwork, the two are linked together
There is no history. As you know the app was acting weird in the last 2 days so I did a factory reset on both. Oops.
If the values are set correctly, the shunt recognises the full charge at some point and corrects the SOC to 100%
ooops … but you have Settings to show us … ?
The first thing you notice is that the temperature compensation is switched off. For a battery that is ‘almost’ outside, this should be included.
However, this is where the manufacturer’s data comes into play again … which you still need to enquire about …
All this will be interesting when the sun really shines again
Do you actually have the option of accessing the AkkuBMS via Bluetooth etc.?
In the topic I asked them to close earlier today the experts said to not play with the settings of the shunt. So I didn’t.
The battery was on 14.1V when I connected. Now it’s on 13.36V which is 100% if I listen to the SOC. Then what was that 14.1V in the beginning? 120%?
But seriously…I don’t understand it.
On a 24V system.
Based on Norwegian prices.
I’d use 2x2 with 2x SmartSolar 75/15.
1: Redundancy, if 1 charger fails you are not stranded
2: You can DIY, sort of legaly🙄
3: Unless you are stationary you will get shade on a 4x string.
PV panels reach Voc max at sunrise so that is not an issue as long as Voc is larger than your maximum charge voltage +5V. In this case that would be about <=35V.
Notice that Vmpp (Voltage at max power point) is not Voc. Usually it is about 75-80% of Voc. You will get close to that point in the morning and evening with a 2x2 configuration so that is an argument for a 1x4 configuration depending on your battery chemistry, type and usage.
And at last. If you start out from scratch and only have the pv panels I would recommend to consider the “all in one” power packs (bluetti, anker or whatever they are called these days).
Best of luck with the installation
I have a 12V system…with 280Ah LiTime lifepo4 battery.
My system is 95% ready and installed and - mostly - working. But thinking on a little update to optimizing things to my RV.
Oki. I’ve done a reset on it it few hours ago and didn’t touch it yet.
" Tail current
In VictronConnect see: Settings > Battery > Tail current.
Some lithium battery chargers stop charging when the current drops below a set threshold. The tail current must be set higher in this case."
I don’t understand what to do with this…
SmartShunt settings are wrong for LiFePo4 (charging V, discharge floor, peukert…).
See documentation, particularly Lithium section:
https://www.victronenergy.com/media/pg/SmartShunt/en/configuration.html#UUID-43af2c64-8f8f-f942-0603-283d02efa6aa
I had an installation on the roof of our wheelhouse with 6 panels in parallel. This may sound weird, (extra thick wiring) but on a ship it is rather unforseeable if one ore more panels may get in the shade,
Same migt be the case with a camper.
In a serial setup one of the panels could block half or the entire array.
What size of wiring did you choose? And probably you have MC4 fuses on each string as well, huh?
I’ve made those changes. Except tail current. I don’t understand it what percentage should be there.
What chargers? This is too high for me.
