Now I'm thinking I'll get a low (100amp) BMS on my 12v battery bank, and connect a 3000W inverter directly to the battery terminals, ignoring the BMS, (but for protection I'll use a relay that disconnects the inverter if the BMS output switches off).
But I'd also like to use a shunt to measure the input and output of the battery. So can I put the shunt inside the BMS circuit? If I put it inside then I can't measure the charge being used by the inverter, but then the BMS will be reading all the cells as having a lower voltage because of the voltage drop on the shunt, and might overcharge them. Is this latter problem significant?
The voltage drop on the shunt is rated at 50mV. Can't find a value for it's resistance. What tolerances do the battery and BMS need to stay within?
But I'd also like to use a shunt to measure the input and output of the battery. So can I put the shunt inside the BMS circuit? If I put it inside then I can't measure the charge being used by the inverter, but then the BMS will be reading all the cells as having a lower voltage because of the voltage drop on the shunt, and might overcharge them. Is this latter problem significant?
The voltage drop on the shunt is rated at 50mV. Can't find a value for it's resistance. What tolerances do the battery and BMS need to stay within?