Rosie via CanBus to batteries, but open loop?

[aaapilot]

Can you connect Rosie & battery bank together via Canbus connection, but control charging in Open Loop?  I want to get the true SOC as reported by the battery bank BMS displayed on the MNGP2 so I can base settings on it, but I want to control charging manually. The WBjr gets close at times, but can vary greatly, especially if you don't fully charge the battery over a period of time. When you connect them together via Canbus, is there a 'new' line selection that allows open or closed charging?  Thanks.

Dave

[ClassicCrazy]

I am not directly answering your question but sharing my experience. I have three different controllers all on same battery system.
Battery reported SOC can be way off - at least with my lithium batteries.
I ended up getting a Victron Smart Shunt to be able to see everything - all controllers, inverters, etc since I put it at the correct spot on the batteries busbar.
I probably could have moved the Whizbang there but it would have taken a lot of rewiring which wouldn't be easy to do.
The Victron Smart shunt is nice since it is independent of the controllers and is very accurate since it doesn't rely on bms and does it's own calculations.  It integrates easily with Home Assistant ( but also has it's own app) . Home Assistant  is what I have evolved into using now for monitoring. Also Home Assistant is fairly easy to set up automations across so many different sensors and devices. One of the main reasons also for the Smart Shunt was my inability to get any computer monitoring from the Hawkes Bay , now it is reflected in the Smart Shunt totals. I hear there is now the Solar Assistant program options but at the time that wasn't available and this works very well.

Larry 

[FNG]

Can you connect Rosie & battery bank together via Canbus connection, but control charging in Open Loop?  I want to get the true SOC as reported by the battery bank BMS displayed on the MNGP2 so I can base settings on it, but I want to control charging manually. The WBjr gets close at times, but can vary greatly, especially if you don't fully charge the battery over a period of time. When you connect them together via Canbus, is there a 'new' line selection that allows open or closed charging?  Thanks.

Dave

No unfortunately you get all or nothing, I can add to the list a "Closed loop defeat" option but presently if it detects a pylon protocol battery it follows the batteries commands. That said why do you want to defeat closed loop?

[aaapilot]

Can you connect Rosie & battery bank together via Canbus connection, but control charging in Open Loop?  I want to get the true SOC as reported by the battery bank BMS displayed on the MNGP2 so I can base settings on it, but I want to control charging manually. The WBjr gets close at times, but can vary greatly, especially if you don't fully charge the battery over a period of time. When you connect them together via Canbus, is there a 'new' line selection that allows open or closed charging?  Thanks.

Dave

No unfortunately you get all or nothing, I can add to the list a "Closed loop defeat" option but presently if it detects a pylon protocol battery it follows the batteries commands. That said why do you want to defeat closed loop?

I do have grid and use the sell-back feature currently in alpha testing.  If I max out the battery charge early in the day, the controllers cut the solar production down to nothing, losing the sell-back and all PV production the rest of the day. When I open-loop, I set the voltage much lower so the sell back begins early in the morning, with minimal charge going to the battery. As max power is produced later at solar noon, PV production is so great that voltage will rise above my lower manual voltage and batteries will charge to full, or very close, by end-of-day just fine.  I believe I heard you say that you do the same in one of your videos.  I'd like the SOC as reported by the batteries to display on the MNGP2 so I might use that number to trigger other functions thru Rosie aux switches.  The WBjr gets way out of sync if you don't do a full charge often. 

Dave