Im trying to figure out how to safely charge a Pylontech battery with Orion TR DC/DCs.
As we all know the safety shutdowns of the Pylontech BMS are not 100% reliable and therefore some PT batteries experienced bloated cells in the past.
The latest Venus OS on the Cerbo GX (in my understanding) now monitors the individual cell voltages aswell and acts if the Pylontech BMS doesnt.
But, since Victron doesnt offer any 48V DC/DCs that come with a VE.direct port and Bluetooth-VE.Smart is not supported by the GX, the GX wont have any control over the Orion TR. So even if it experiences a problem, the Orion TR will happily continue to overcharge the PT battery.
Long story short: How can I use an Orion TR 12/48 safely with my PT batteries and have the GX in control if something goes wrong? The only way I can think of is to configure the GX to use one of its relays to enable or disable the Orion TR? Is it possible to configure the Cerbo this way?
Thanks! I havent looked into node red, yet. Will do next!
I dont agree on the last part of your post. If one cell or more are low for whatever reason, the highest cell can still be overcharged, even when keeping the total target voltage under 52V. Its still a good idea to limit the charging voltage to 52V, tho. But this doesnt mean monitoring on cell level is obsolete.
The batteries would have to be in shocking condition to say the least if that is the case. And then i would not consider then safe to keep in service being as they do catch on fire on occasion.
Its just a matter of time. They can be totally fine today, but some day something will break or degradation will reach a cricital point. And then I want the Cerbo to shut down the charging of the battery before overcharging occurs. We are talking about a mostly unsupervised system here.
48v input 12v output the Orion were the only models i could see on the datsheeet last night.
And me now getting grumpy with a local supplier who have been saying no such thing can be stocked when clearly they exist…
