Battery not charging

[Johan]

Hi All,

I have created a nice system, unfortunatly the customer is not allowed to feed into the grid.
Now he has asked us to design a battery system to store the energy.

Unfortunatly or I am doing something wrong or I encounter a bug...
The problem is that with or without batteries there own usage part remains exactly the same.
What I can see in the results is that on a sunny day also the betteries are not being charged.
Can someone see if I am making a F*up ?

Greetz Johan

 

 

[Johan]

Additionally also the heatmap does not show any charging

[developer_mh]

Dear Johan,

would it be possible for you to send the project file so that I can have a look into it? You can send it here in the forum as a private message to me.

Thanks and kind regards,

Martin

[developer_mh]

Dear Johan

thank you for the project file. In this case, the display of the connection of the DC intermediate circuit coupling of the battery system in PV*SOL is a bit misleading. In the 3D environment, there are 4 inverters, all of the same type and with the same configuration layout (2 x 15 on each MPP tracker). So, in the PV*SOL main software, these 4 inverters are displayed as one group (4x inverter xy). The DC battery system, which consists of 4 units, appears to be connected to the group of 4 inverters (one battery system on one PV inverter). But, unfortunately, our simulation core realizes that the shadows on the PV modules over the 4 inverters are not the same and calculates each inverter separately. The DC battery system, scaled by factor 4, then is only connected to the first of the 4 inverters. So, in the simulation, the battery system only sees the PV energy from inverter one, which is far less than the load profile, and this is the reason why the battery system is never charged.

We will make that clearer in the upcoming release in order to avoid PV systems with that kind of confusing (or wrong) connection.

Hope that helps, kind regards,

Martin

[Johan]

Hi Martin,

Ha yes, now when I set it up (software wise) with 1 big string inverter (80kW) in the 3D enviromentand the in the "battery systems" 4x 20kW hybrid inverter it does seem to work.

But it is strange that with this setup in PV*Sol you cannot create a correct simulation for a hybrid system.
Will this be adjusted in future updates?

Greetz Johan

[developer_mh]

On 2/13/2023 at 11:58 AM, Johan said:

Will this be adjusted in future updates?

Yes, we will make that clearer in the upcoming release in order to avoid PV systems with that kind of confusing (or wrong) connection. In order to have that exact system that you were trying to simulate, it will take us some more measures, since there are performance algorithms involved that we don't like to destroy by accident

Kind regards,

Martin