SOLVED. I had 2 sets of pannels running, so I changed one MPPT for the other. The ‘faulty’ one started working, so there was someting wrong in the setup of the 2nd set. After thorough check, the 2nd set seemed to have 2 inline breakers. One of them was defect. Removed it and the system was back again.
SInce 3 days my SmartSolar Mppt 150/70 is not charging. Itested all items in this ‘network’ and although the voltage output of the panels is between 70-110v, the unit stays ‘asleep’ as if it is night and will not wake up.
The status is: off and the Victron Connect app says: “not enough PV input”.
Well I measured it, and the panels provide 70-110v, so that’s more than enough to start up charge the 24v battery bank. I disconnected all cables to try to force a reset. Did not help.
At the side of the solar panels, the voltage was >70-110v, and when disconnected, from the MPPT over those samen cables (of course duhuh) the voltage was >70-110v, but… when I (re-)connected those PV cables to the PV terminals of the MPPT, and I measured those terminals… it read 13,4. (it’s a 24v bank) |
I have 4 panels 2s+2s, 465 Watt (Pmax), VoC 50,15v, VMP 42,43v, lsc 11,49A, max power 10,96A. All checked, and ok.
So I think, the PV side of this unit is faulty. Any suggestions?
Why don’t you show us an image from Victron Connect … maybe your charger is “OFF” ?
Have all the fuses been checked?
What is your panel arrangement? 3 panels in series?
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I edited my post with more info. Be aware: I checked every item, every panel, every cable before I started this post. Yes, everything is checked.
Of course, the Mppt can also be defective … A warranty from Victron would of course have to be checked here.
However, with 2000W the controller was already well at the line limit for 24V 
However, it may well be a PV connection that has a voltage of 100V when idling BUT immediately collapses under load.
This is difficult to check … you would need 2 x 24V bulbs or 4 x 12V bulbs … but who still has them on board …
What readings do you get if you granularly connect panels and strings?
Disconnect all panels.
Then just connect a single panel, measure and observe MPPT readings.
Repeat for all 4 panels.
Record results.
Then disconnect all panels.
Next add a 2 panel series string, then measure and observe MPPT readings.
Record results.
Disconnect that 2 panel string.
Then do the same with the other 2 panels to make a string and repeat as for the first string.
Please post results here, image of multimeter reading, and MPPT screenshots are very helpful.
Also I’m assuming you have conducted a resistance test in addition to continuity, on your PV to MPPT cables against their spec?
All checked you say. Cool, but Voltage is only one part of the story. Did you check the current?
