I have Deye inverter 8k it shows always consumption more than PV production even in the noon and sun is ok

I have 16 PV panels longi himo 5 (555 w each)

How to set not to use battery if PV can produce more power

53 minutes ago, Bachir said:

I have Deye inverter 8k it shows always consumption more than PV production even in the noon and sun is ok

I have 16 PV panels longi himo 5 (555 w each)

How to set not to use battery if PV can produce more power

How many Watts are being supplied by the panels, battery and grid and what is the consumption reading?

Hi Bachir

To me, it looks like a PV panel problem, as you say, you do not produce enough PV power. According to the pictures shown for the time of day, except if it is overcast. I would check the setting that limits the PV power first, and then check the PV panels.

How have you connected the 16 PV panels(serial, parallel), and are the panels facing South at about 35 degrees, as the pictures show in Lebanon? It could also be the MPPTs in the Dye.

22 hours ago, Bachir said:

How to set not to use battery if PV can produce more power

Is ToU enabled and what is the SoC setting for those times of the day, matching your screenshots?

I don't see huge current out of the battery, so, since you seem to have no grid, this is fairly normal behaviour,, adding a few Watt from the battery to the solar mix, since the MPPT response is not that fast...

Hi

I see the pictures show only one with grid use at 5:21 in the afternoon, which I failed to see. I find it interesting about the lag of the MPPT response, which makes complete sense.

The PV panel won't produce more than is needed. The excess power produced can't be stored anywhere other than the batteries, which show they are fully charged.

The PV panels will give more power if fed back into the grid.

There is most probably no problem at all, as KM has indicated.

To get the most out of the PV panels installed (8880w) is to do all the heavy-duty work and use the power-hungry appliances (electric geyser, electric hotplates, electric kettle, iron, aircon, etc) during the day if you can't feed back to the grid. Be sure to switch a geyser and aircon off at night, as it will be expensive, or they will drain the battery quickly if not tied to the grid.

Edited May 6, 20251 yr by Peter Topp

2 points now that we have values. The power used under consumption would include about 50-80W that the inverter is using for self power. With loads as low as you have and fully charged battery the panels cannot produce more than the loads switched on.

A instant test if you look on the screen and not the once every 5min reading would be to switch on a kettle and say the microwave. You will the see a big jump in the power produced by the panels.

You will notice on all the days you showed the power produced by the panels exceed the power you used for loads. Thus with higher loads during the day time you will see the increase in daily production. One of the slides show the battery was deeply discharged and that day you daily production was much higher than what you used for loads.