Mobile system build in progress

[Csepel (Udo)]

Okay, it’ll be a little while before I can show you the installation, but I can describe it roughly. It’s installed on an overland truck, and I’ll just start at the top:

There are 7 panels on the roof, arranged as 2 separate systems, plus 1 panel on each of the sloping roof sections; both of those can be tilted towards the sun:

Solar array 1 consists of 4x Reno 225 Wp panels connected to a SmartSolar MPPT 250/60 Tr

Solar array 2 consists of 3x Topunive 100 Wp panels connected to a SmartSolarMPPT 100/15

Solar array 3 consists of 2x Offgrid 165 Wp panels tilted at 45°, connected to a SmartSolar MPPT 75/10

They’re all “flexible panels”. The ones lying flat have 35 mm of rear ventilation, and each solar array has a load switch before the MPPT.

Moving on to the “basement”: the MPPTs are installed here and feed a Multiplus II 3000/24.

The power goes into a modified EEL battery as a 24-volt system with 8 324er GATL cells, giving 8.24 kWh, including heating and a JK-BMS.

There’s also a shunt, a Gerbo GX/ 50 and an Orion TR 24/12- 15 installed.

As for the loads, everything in the cabin, including the fridge, runs on 24 V, except for a few USB charging sockets.

I need 230 V for the induction hob and the 750-watt heating element for the hot-water boiler, an air-conditioning/heating unit, and the socket for the laptop. There are also sockets for things like the e-bikes.

I’m always happy to answer questions or hear ideas and input.

Udo

[BjoernK (Björn Kellermann)]

The battery doesn’t look secured. At the very least, there should be tie-down straps or brackets over it.

There was a thread here once about the connectors for communication. They wouldn’t be suitable for vehicles and would work loose from vibration.
The solution would be to secure the cables just above the connector. That way, the Ve.Bus connectors in particular couldn’t come loose.

If possible, I’d use a Lynx Distributor for the fuses and power distribution, and integrate it using open-source software. Then you’ll get an alert as soon as a fuse blows.

GitHub - twam/dbus-lynx-distributor: Plugin for Venus OS to readout Lynx Distributor with Lynx Smart BMS · GitHub

[Csepel (Udo)]

Hi Björn, thanks for the comments.

The straps are ready, but I haven’t fitted them yet as I removed the battery again.

I hadn’t thought about the connectors, so I’ll bear that in mind. But as you can see, none of the communication cables have been run yet, and the Cerbo is still practically untouched.

The Lynx Distributor might be worth considering.

Udo

[Csepel (Udo)]

Yesterday I did a bit of wiring. I connected the three MPPTs via VE.Direct, and I’ll use VE.Direct to USB for the shunt.

One thing I forgot to mention in the description: the battery has a built-in heater, and the BMS is from JK (I don’t know whether it can be integrated with Victron. I do have a separate display and app for it, though). At the moment, two level sensors are installed for fresh and grey water. I’d also like to add temperature monitoring for the batteries and, if necessary, the interior. I’ll keep you posted.

[Csepel (Udo)]

[Csepel (Udo)]

With the wiring shown, uploading somehow isn’t working.