March 6, 20206 yr On 2020/03/04 at 9:15 AM, Crankshaft said: How will this behave with a Victron Multiplus used in UPS mode. I'm concerned that there will be conflict with the inverter's change-over relay and the BMS's relays/contactors. Well I am not familiar with the blue stuff but in general one can say that the BMS is there to keep cells balanced and it will be the emergency brake. When things go out off control the BMS will shut the battery down. But in a well configured system this should not happen and when it happens it should not cause damage in the inverter.
March 6, 20206 yr 1 hour ago, RikH said: Well I am not familiar with the blue stuff but in general one can say that the BMS is there to keep cells balanced and it will be the emergency brake. When things go out off control the BMS will shut the battery down. But in a well configured system this should not happen and when it happens it should not cause damage in the inverter. Makes sense, thank you. I was thinking that the relay would disconnect the battery once it is fully charged, but yes, I imagine the relay is there to disconnect in extreme cases.
March 7, 20206 yr 17 hours ago, Crankshaft said: Makes sense, thank you. I was thinking that the relay would disconnect the battery once it is fully charged, but yes, I imagine the relay is there to disconnect in extreme cases. The relay opening is akin to a father actually turning the car around after threatening to do so for the past hour... 🙂 Where you have a BMS that can communicate with the inverter, it can issue warnings. You drop that charge voltage this instant or I swear I will...! In the end, the final responsibility is with the BMS. Cheaper BMSes don't warn... you have to know to behave... or else! 😛 (Which is why I always say that sometimes too much is made of the whole comms thing. If you design a well-behaved system, you can get away with much less).
March 10, 20206 yr Author On 2020/03/06 at 3:21 PM, RikH said: Well I am not familiar with the blue stuff but in general one can say that the BMS is there to keep cells balanced and it will be the emergency brake. When things go out off control the BMS will shut the battery down. But in a well configured system this should not happen and when it happens it should not cause damage in the inverter. Hows your new system working out ?
March 11, 20206 yr On 2020/03/10 at 4:14 PM, 20VT said: Hows your new system working out ? Still waiting for my batteries. These Chinese bird cough you know...
March 12, 20206 yr Author 19 hours ago, RikH said: Still waiting for my batteries. These Chinese bird cough you know... Yes the entire world is on pause...
March 27, 20206 yr On 2020/03/10 at 4:14 PM, 20VT said: Hows your new system working out ? I've started the build after I received the batteries this week. Look here!
March 28, 20206 yr Author Looks great RikH. BTW I ended of getting a Daly BMS well made and reasonably priced and works like its meant to
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