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I was wondering if the Smart range LifePo4 can cut the batteries loads off when the cells reach a voltage that is too low? Or do I need an external relay for that? The loads would be around the 150amp range at max. In the connect app you can set the lowest voltage. But does it actually cut the power internally?
You need an external BMS and a relay to cut off your loads.
https://www.victronenergy.com/accessories/ve-bus-bms
(if you have any VE.Bus devices like MultiPlus or Phoenix)
OR
https://www.victronenergy.com/accessories/minibms
AND
https://www.victronenergy.com/battery-isolators-and-combiners/cyrix-battery-combiners
(cyrix-li-load 230A)
The battery itself will not cut off the power at it's terminals.
As M.Lange wrote, and...please read the manual, -very- important information in it!!
Thank you for these answers and excuse the very late reply.
I have installed a Ve.bus bms and also connected a 500amp contactor relay to the load disconnect on the VE.bus BMS.
