New RV installation and I’m not sure the panels are charging the batteries. The blue light is flashing on the MPPT and the discharge is working when I turn on the 12v fridge.
I can’t use Victron connect app (label mix-up, wrong serial number, wrong PUK, but that’s another story). So I’m using Overkill solar and it shows no charge going in.
Any advice? TI
Not possible to say as that is battery information and it foesnnot include current at all.
You would literally have to watch the individual cell voltage rise (and it will do that veeerrry slowly)
What mppt do you have?
Check the voltage at the terminals for the pv and also the battery.
If the digital meter has a current clamp even better, clamp a battery wire.
Have MPPT 100 20
In the last hour 3 of the 4 cells have dropped by .001 and the 4th cell is unchanged. Full sun exposure.
I’m looking at the Overkill app at the top and the charge arrows have never changed (I.e. unlit). The discharge arrows worked when running the fridge.
Cells are still dropping with full sun exposure. In 2 hours they have dropped:
.004
.003
.002
.003
Does that indicate that the battery is not taking a charge from the solar panels? There is nothing turned with the 12v system.
This means the MPPT is waiting for Solar input. Measure the battery and PV voltage on the MPPT terminals.
Interesting. The RV dealer said the flashing blue means it is charging.
I’ll have to research how to take those measurements because I know nothing about these types of batteries. Thank you for your reply.
Depending on the model, the MPPT has 4 or 6 terminals. Battery on left, PV on right (4 term) or in the middle(6 terminal). Connections are labeled.
PV Voltage has to be Vbatt+5 in order to start. This typically needs low voltage (17-20v) solar panels to be wired in series. No end of people get this wrong.
MPPT 100/20 is a 6 terminal device, the last 2 on the right are the load output terminals.
Thanks again. Yes it has 6 terminals. Probably best if we just take it back to the dealer because they have to pull the BMS to get the right PUK off the back.
If you have a small volt meter, I would check the voltages first. Just to make sure things look ok…
??? The MPPT has a label - this should have a pin and a PUK on it… did you confuse MPPT with BMS?
I don’t see a PUK on the MPPT . It’s the BMS that has the wrong PUK on the label that was loose in the documentation. https://photos.app.goo.gl/zUoxUZBqJLmdQD6D8
MPPT label is either on the top, side or back of the unit.
The BMV is NOT a BMS, the BMV is just an energy and voltage monitor, while a BMS does a whole lot more besides.
Default PIN for the MPPT is 000000 (usually).
This is what has the wrong pin and PUK:
I’ll look again on the MPPT.
Kudos to Thiemovanengelen for noticing my PUK problem and getting me the correct info. I now have a working app so we’re making progress.