ignaciomichelenamugni
New Member
- Joined
- Jun 24, 2022
- Messages
- 7
Hi all!
I am new to the forum, so thanks for having me
I am experiencing an interesting issue on my off grid boat setup. I use a Victron MPPT charger for my main 24V solar array (2 x 170 watts). I also have a second charge controller with a portable 24v solar array ( 2 x 50watts) that I only use when needed.
I have a DIY 12 V 280AH Lifepo4 battery pack.
Attached a description of my setup:
Problem:
**********
Since a few weeks ago, I noticed that my solar input (Victron) is giving less than half of the power it normally does (normally I get next to 340w in optimal conditions). At the moment I am only getting around 100w to 120w in similar weather conditions. When looking closely, I noticed that even though my battery voltage is around 13.4V, the Victron MPPT sees 14.6V so it goes into float directly which seams to be reducing the output (due to the small to none voltage delta I am guessing).
In this picture you can see that my Victron shunt reports a voltage of 13.41V, while my MPPT shows the following:
As soon as I restart the device, it starts to work correctly for a few minutes, giving next to 200 watts, but then it comes back to this state again and stays there.
I've seen some posts that talk about a fuse on the output which isolates the MPPT from the battery so the voltage goes up to max. But In this case, how can I be getting any charge at all? the battery is being charged.. just slower.
I looked for errors, but it shows 0 errors:
I thought my shunt maybe was giving the wrong information, so I replaced it with a brand new one, but no change.
Anybody has any ideas? should I assume a faulty MPPT controller? I tried going to default settings already but did not help.
Thanks for any help!
Ignacio.
I am new to the forum, so thanks for having me
I am experiencing an interesting issue on my off grid boat setup. I use a Victron MPPT charger for my main 24V solar array (2 x 170 watts). I also have a second charge controller with a portable 24v solar array ( 2 x 50watts) that I only use when needed.
I have a DIY 12 V 280AH Lifepo4 battery pack.
Attached a description of my setup:
Problem:
**********
Since a few weeks ago, I noticed that my solar input (Victron) is giving less than half of the power it normally does (normally I get next to 340w in optimal conditions). At the moment I am only getting around 100w to 120w in similar weather conditions. When looking closely, I noticed that even though my battery voltage is around 13.4V, the Victron MPPT sees 14.6V so it goes into float directly which seams to be reducing the output (due to the small to none voltage delta I am guessing).
In this picture you can see that my Victron shunt reports a voltage of 13.41V, while my MPPT shows the following:
As soon as I restart the device, it starts to work correctly for a few minutes, giving next to 200 watts, but then it comes back to this state again and stays there.
I've seen some posts that talk about a fuse on the output which isolates the MPPT from the battery so the voltage goes up to max. But In this case, how can I be getting any charge at all? the battery is being charged.. just slower.
I looked for errors, but it shows 0 errors:
I thought my shunt maybe was giving the wrong information, so I replaced it with a brand new one, but no change.
Anybody has any ideas? should I assume a faulty MPPT controller? I tried going to default settings already but did not help.
Thanks for any help!
Ignacio.
Last edited: