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djkarau avatar image
djkarau asked

Looking for a system schematic for RV with Solar and Tesla batteries.

I'm currently designing a system for my RV, we plan on having 5 x 315 watt solar panels with 2 x Tesla batteries. The RV already has 50 amp service and a transfer switch (for generator). I'm thinking of a 24/3000 Mulitplus, 250/70 SmartSolar controller and a BMV 712.

schematics
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3 Answers
JohnC avatar image
JohnC answered ·

I can't speak for your batts, but the Victron van project would be worth a look. As a demo project it's filled with every gizmo known to man. You won't need them all, but it shows where they fit in:

https://www.victronenergy.com/blog/2019/06/18/the-victron-van-install/

Follow the links for schematics and details.

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Tom avatar image
Tom answered ·

I have 2 Tesla modules in my RV set up at 24 volts. I use a Multiplus 24/3000 Charger inverter. Do not use a Victron Battery Protect between the Multiplus and batteries as this can cause a fire. You will need to use a Kilovac or Gigavac contactor with a pre charge to have your BMS set up to disconnect the battery.

I use a BP65 between my MPPT and battery to use as a switch with over current charge protection. I have a under voltage relay set up with my contactor to shut down before the battery gets to low. I have a BP connected to the 24 VDC buss bar to also shut down automatically during low voltage.

The Victron VW Van set up is helpful but uses the Victron Li Batteries and BMS.

Here are some helpful links to help you design your system.

http://offgrid100.com/

https://turtleherding.com/2018/06/mod-tesla-powered-tiffin/

https://www.mortonsonthemove.com/toms-tech-blog/solar-phase-2-the-tesla-battery


Happy to help kick around ideas if you like.

Tom

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spirou avatar image
spirou answered ·

https://www.explorist.life has some useful diagrams

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