MPPT Power Limited

Hi,

My installation MP2 48/5000/70 ( v502), MPPT1 100/20 (2 panel) , MPPT 150/60 (9 panel), venux GX (3.00 => update 13/06 for new feature) + Pylontech BMS.

i discover MPPT1 is in MppOperationMode=1 for unkwow reason. The phenomen start in 10 July (during my holidays) and this installation work well from 2 years.

I try to rollback to 2.92 but nothing change

Restart MPPTs, MP2 but this morning with cloudy (less 300W) always the same problem.

With cloudy MPPT2 power = 4,5(4) MPPT1 Power at this time MPPT2 is 400W and MPPT1 is 10W

with battery = 20%

- DVCC maxcharge is 70A

- CCL 130A

it's look like a bug firmware

(dashboard id 77614)

2 |3000

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matt1309 commented · Aug 11, 2023 at 11:43 AM

Hi @ErthyP

It's an odd one. My first guess was going to be communication to MPPT not working but then you've noted that you can see MPPOperationMode updated to 1, rather than running normally on 2.

Assuming you've tried firmware updates on all devices etc.

I wonder what would happen if you disconnect communication to GX device and setup MPPT 2 as stand alone and monitor in victron connect rather than via gx/vrm. Does it resort back to full power? That would at least confirm it's something to do with integration into GX system.

No issues on the PV side is there? No unusually events happened when you first noticed the behaviour starting?