Hello everyone,
I’d like to introduce my Victron system here in the forum 
It’s installed in a house over 150 years old in central Germany and provides me with 50-60% energy self-sufficiency despite having a heat pump and not a large PV array.
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PV
Currently, I have 4 strings connected to my 48V system via the DC side:
2 strings with 5 modules (450W Trina) on the carport (south-facing, ~40°) connected to the RS450/200
1 string with 7 modules (400W Trina) on the roof/balcony (south-facing, shallow angle) connected to the RS450/200
1 string with 9 modules (400W Trina) on the carport. These are in a 3x3 configuration connected to an MPPT 150/35
This system only came about because I had the modules and space available, and the costs were therefore very low. The orientation and shading are poor, but there was no other option there. Nevertheless, it produces several hundred watts, especially during the transitional seasons, which I can certainly use. I’ve also installed nine Tigo optimizers here to improve the shading. I’m quite satisfied with the yield, currently 6-8 kWh per day.4 modules (450W Trina) on a shed, AC-side via a Hoymiles inverter.
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PV To-Do
The 450/200 still has one string free. In the fall, I’ll build a canopy over my basement door and heat pump, consisting of 4 PV modules.
I might add some fence-mounted PV towards the neighbors, but I’m not sure yet. -
Victron System
I installed the system in the basement.It consists of 3 MultiPlus-II 5000, the RS450/200, and an MPPT150/35. The control unit is a Cerbo. On the DC side, everything is wired with 70mm² cable via the Lynx Power In (converted to fuses). The house itself is unfortunately connected via the AC input, as the main distribution panel isn’t in the basement and there’s only one 16mm² cable running to the sub-distribution board in the basement. So, “emergency power” is currently only possible via the wall sockets and the CEE socket.
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Battery System
I currently have two 16kWh battery blocks with EVE MB31 cells. Both are protected by a Lynx with an Adler EF3 fuses. The BMS is from Batrium, and the cells are also actively balanced. I have to say I’m very happy with the system and have a bit more confidence in it than with a Chinese BMS. The Batrium itself doesn’t have MOSFETs but disconnects an MCCB via remote trip in an emergency. Besides the shunt, I’ve also installed a 400A NH0 fuse as a “last defense.” I have to say, when the MCCB trips, you’ll notice it throughout the entire house
But this will normally never happen.I still have a few to-dos here: The covers for the upper battery (which is new) haven’t been printed yet, and I’d like to mount a protective cover in front of the battery.
