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Good day,
I'm having voltage discrepancy issues with my Phoenix 800 inverter and my BMV. For more info on that please feel free to check this post: https://community.victronenergy.com/questions/144128/phoenix-12800-shutting-down-not-overload-not-setti.html
Can I get the BMV to set the voltage of the system in order to override whatever the inverter reads?
Or perhaps my cabling is wrong, unlikely but possible.
The culprit was indeed the circuit breaker. Thanks @klim8skeptic
The ABB works normally and it was only 10 Euros more than the cheap one, and on top it's dual contact. Voltage is now constant under 500w all round.
As a summary, there was nothing really bad with the batteries, they are old but they work fine still. I'd rather keep them until they are shredded since the pollution that relates to transport of lead acid batteries is not ethical so far as they have to ship them overseas to recycle them.
Or perhaps my cabling is wrong, unlikely but possible
Perhaps a picture of your system would help?
Here you go, I can actually see that the inverter is connected to a different battery vs the MPPT, that's a variation I have added to even the energy spread, but the BMV point 1 is connected onto the exact same one, so I still don't see how I get this issue. I'm a bit of a noob in wiring though.
Your choice of inverter circuit breaker and it's location is bad. I used a similar CB and they are just garbage, tripping below current rating and voltage drop. Breaker should be located close to the battery, to protect the cable running to the inverter.
Your cross diagonal battery wiring is wrong. The center batteries are taking most of the charge, and most of the load.
Your batteries are circa 2013. One of them has a dodgy looking battery post. They are at, or over their life expectancy. Time to start looking at replacements.
After you have replaced the CB though.
Thanks for your reply @klim8skeptic
I will:
Then will go from there.
You should take a look into the Wiring-Unlimited Book:
https://www.victronenergy.com/upload/documents/Wiring-Unlimited-EN.pdf
(Chapter 3)
If you can rotate the batteries 90° you have it exactly like in the book and you can make a much cleaner wiring.
The "earth" wire also have to be at the shunt, not at the battery.
Here is a drawing of how it is wired on the existing system
Please let me know if either this drawing is incorrect or if there is something incorrect on it.
The cheap monkey circuit breaker stopped delivering current completely, I'm ordering a better one. Thing is, most automotive type circuit breakers, those black ones, very often go faulty. In my stationary system, I always use ex telecom breakers because they just work fine, never had an issue with those. I ordered a bipolar ABB to replace it.
The culprit was indeed the circuit breaker. Thanks @klim8skeptic
The ABB works normally and it was only 10 Euros more than the cheap one, and on top it's dual contact. Voltage is now constant under 500w all round.
