u/Cessna152RG

After changing pretty much all the electronics at my cabin, I found out the batteries needs changing as well. I have a Multi RS Solar, Smart Shunt, Smart Solar 100-20, Orion dcdc to get 12v, and a Raspberry pi with Venus OS

I found a good supplier near where i live that have me a discount on 280 or 324ah batteries. I am still trying to decide, but so far the 8000 cycle life of the 280 is really tempting vs the 4000 of the bigger ones. It is for a cabin with very limited power needs, so the capacity isn't that important.

My main question is what BMS to choose. ​I am being offered a JK-BD6A24S10P with the cells. The main advantage i can see here is tar if anything happens to them it is easier to make a warranty claim if it is all from the same store.

My other option is to buy a ​​​JK-PB2A16S20P from Aliexpress.

Does the inverter version do anything that the Smart shunt can't do? I have been reading and can't wrap my head around this.

Another issue i am having is to get the Multi RS to connect to the Pi. I have a can to usb-c thing, but it didn't work. I am going to use a different usb cable the next time to make sure ​​​​i didn't use one that's only for charging. The adapter I used has got a 120ohm termination built into it, but i need to make a termination for the RS.

We own a cabin that we both use ourselves and rent out on Airbnb.

When we bought it, the 220V system were installed, but the previous owner had just hooked up a 2KW generator to it. To make it more user friendly, we installed five solar panels on the roof, an Epever 5000UP Inverter/charger and a battery bank consisting of six 57Ah Li-Ion batteries in paralell. This served us well, but it was surprisingly noisy and lacked some oomph in the fall and spring.

The next step was to get a proper generator and hook it up. That saved the winters. Next we installed two almost vertical panels facing south and a Victron Smart Solar 100-20 MPPT to get some more power during the spring and fall.

Last week the Epever somehow started giving out crazy voltages (up to 75V) and wound up destroying the Victron. Luckily it was covered by warranty (after about 20 emails) and we are paying a bit extra to upgrade to a Multi RS Solar 48/6000. Since it needs 120V to start charging, we will keep the Smart solar for the south facing string.

So our new system is going to be all Victron and I will use a Rasberry Pi to host the Venus OS and use a tablet velcroed in front of the RS Multi as a display.

I am really looking forward to installing it and once it is up and running, I am looking forward to quiet nights at the cabin.