Both MPPT's not changing batterys

DIY
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1

Hi all, I am after some help please.

My Set up is as follows with all firmware up to date:

Victron MultiPlus II 48/5000

Cerbo GX

2x Victron MTTP 150 35

Growatt PV Inverter

6 Polytech C2000 batteries

Everything has been running perfectly for just over 2 years now. I checked today to see how the charging was going as it’s been a lovely sunny day

I saw that PV inverter was running the house and the excess was charging the batteries (81% charge) but both of the MTTPs where not showing any charged at all, both were showing the max voltage but for some reason not allowing the MTTPs to charge the batterys. Both the MTTP’s were charging perfectly until 1.32pm today. I have not changed any settings since it was all setup.

I carried out a test and switched on both of my ovens in the kitchen to draw 5KW, I left the ovens to heat up for 5-10 minutes waiting for both of the MTTPs to switch on but they didn’t? All the current was being drawn from the PV inverter and the batteries only.

VRM world: Fareham Hampshire 14.4kWh ESS+PV

Would any one have any ideas please.
Best Regards
Mark

2

Hi Mark.
Do you see any warnings in the remote console?
Did you just try to restart the whole system? I mean turning off AC and DC for a while and reset all components? In best case you also can disconnect DC of the MPPTs to ensure also the MPPTs are disconnected and resetted.

You know, sometimes it is that easy… :wink:

3

You may not have deliberately, but when you update it does wipe settings on the inverter. Was it reprogrammed?

1 Like
4

Thank you for replying, Its all been running 100% since I have done the last update a few months ago.

5

Hi ya Jetlag, Yes I have shut it all down and restarted it all in the corret order :pensive_face:

6

Update, I have now replaced my Cerbo GX and I am still having the same problem.
I have rebooted the hole system in the correct ordrer as well :sob:

7

Give us a few screenshots from your remote console configuration.
If the charging voltage from the Gowatt via the Multi is higher than the Mppt charging voltage … nothing happens.
You must have activated DVCC, right?

8

All sorted and working!.. It was a fuse between the batteries and the MTTP’s, It must of been causing a high resistance, I touched the outer casing of the fuse holder the fuse popped.

Thanks everyone one for your responce’s

Mark

1 Like
9

Thanks for the feedback. :wink: