Greetings all.
I am configuring and integrating a LiFePo4 stans alone 3P4S 12V (942 Ah) with REC Active MBS w/wifi and precharge in my current system which I describe at the bottom.
I am looking for itel and pointers to resources/examples/drawings to address the following points;
- ABYC E-13 requires that boat's electrical system won't be damaged if a BMS disconnect occurs. What are the current thoughts on addressing alternator load dumps if the BMS shuts down for a WS500 equipped vessel?
- ABYC E-13 requires that critical boat systems should have alternate power sources so they can remain operational in the event of a ABMS disconnect. What would be a way to seamlessly switch from house to starting/emergency battery in an emergency shut down (or at some critical pre-shut down level)?
- In addtion, what is a well accepted way to charge the flooded starting/emergency battery when the house is comparatively large lithium chemistry? Currently the Blue Sea SI-ACR does it. Short of having dedicated devices, how do people charge from LiFePo4 house. Is is possible to use the Orion XS as a 12V charger for the flooeded battery under normal operation and a relay activated switch for the floded to take over in an emergency as defined by BMS paramenters?
Current system
Cerbo GX, MultiPlus-II 12/3000/120-50 120V inverter/charger, WS500 (with a 90A alternator), BMV712, 2x175W solar with Victron MPPT
Starting Battery: 12V Flooded Group 27
Blue Sea SI-ACR
The closest diagram I have found that fits my situation and future goals is the following
https://rec-bms-na.com/download/31/rec-active-bms-sketches/1464/rec-active-bms-wiring-diagram-rec-active-bms-2p4s-1-relay-precharge_3_0.pdf
Thanks,
Stefano
Check out this one. It may assist with many of your queries.
And don't forget, these are all available in editable versions too.
https://rec-bms-na.com/system-design-ideas/#48-50-wpfd-marine
Here is a link to a video tutorial we did a while back showing how to create your own system diagrams using the freee online tool drawio.
https://www.drawio.com/
@Stefano
Greetings all.
I am configuring and integrating a LiFePo4 stans alone 3P4S 12V (942 Ah) with REC Active MBS w/wifi and precharge in my current system which I describe at the bottom.
I am looking for itel and pointers to resources/examples/drawings to address the following points;
- ABYC E-13 requires that boat's electrical system won't be damaged if a BMS disconnect occurs. What are the current thoughts on addressing alternator load dumps if the BMS shuts down for a WS500 equipped vessel?
I have a Zeus from Arrco and I'm using one of the octocouplers to control charging via an "ATC (Allow to Charge)" connection the Zeus provides, I bet the WS500 has the same. If the ABMS fails the Zeus will stop charging via this signal wire along with it's connection to the Cerbo. I also have Sterling surge protector for my alternator so any surge that doesn't get cut off before the ATC signal can act is taken by the protector and not the alternator or regulator
https://www.sterling-power-usa.com/SterlingPower12voltalternatorprotectiondevice.aspx
- ABYC E-13 requires that critical boat systems should have alternate power sources so they can remain operational in the event of a ABMS disconnect. What would be a way to seamlessly switch from house to starting/emergency battery in an emergency shut down (or at some critical pre-shut down level)?
I have my traditional lead acid cracking battery setup to use a DC-DC charger from my LifePO4 pack (house) and have designed my system in a way that keeps my starting and house banks seperate. Exepct that I have provided a DC circuit back to my main panel from my traditional lead acid battery with a lower rated "on/off" switch. The idea being that if my house bank were to ever fail I could enable this DC path back to the lead starter battery and run minimal loads like NAV systems and lights for a relative short time until I can resolve the issue.
If you wanted to take this idea further you could also wire a switched dormant DC path way from your MPPT back to the starting battery and keep a backuped config file on hand to change the charge parameters to lead acid quickily. Same idea with the alternator also.
- In addtion, what is a well accepted way to charge the flooded starting/emergency battery when the house is comparatively large lithium chemistry? Currently the Blue Sea SI-ACR does it. Short of having dedicated devices, how do people charge from LiFePo4 house. Is is possible to use the Orion XS as a 12V charger for the flooeded battery under normal operation and a relay activated switch for the floded to take over in an emergency as defined by BMS paramenters?
I have my alternator/multiplus/MPPTs charging the LifePO4 house bank first and a simple DC-DC charger that keeps my cracking battery charged. With another DC-DC charger for my windlass system.
