Hi friends I have a question about the energy flow chart. You can see my project energy flow. I do not understand that, if my pv system generate 188.107 kWh of energy why my load can not use 156.386 kWh. why does my load get energy from the grid ( 90.695)?. How does pvsol calculate it? can you explain me? I want to make the report for the customer so I want to show how much energy pv system generates and which part of that energy is exported to the grid and the load used? ( sorry for bad English ).

Hello Balck

Your production must be in time with your consumption in order to use a higher fraction.
Please have a look into the following thread where the concurrency issue is answered:

Kind regards
Frederik

In the consumption part, I just entered mouthly values, and I did not choose any load profile. in this case, how does pvsol take concurrency?

Hello Balck

In your case your profile as a carplet plot should be looking something like this:

Now every month has got a constant load, independent from day or night when your PV system does not produce anything. Consumption can only be covered when it overlaps in time and is less than production

Does this help?

Kind regards
Frederik

14 hours ago, developer_fw said:

Hello Balck

In your case your profile as a carplet plot should be looking something like this:

Now every month has got a constant load, independent from day or night when your PV system does not produce anything. Consumption can only be covered when it overlaps in time and is less than production

Does this help?

Kind regards
Frederik

Hi Frederik, I make a PV system for the university, I select a school load profile for my project, and the energy flow chart is changed. So I understand that I must create daily and hourly load profiles for the project. anyway if we input just monthly or yearly annual load values, PVSOL can take some concurrency coefficients which I do not know maybe these values default. So I want to share the results with you. first I entered annual yearly consumption which pictures marked with number 1. In this case, own consumption is 470452 kWh and export power is 1157052 kWh. In the second case, I chose a school load profile for my project and entered the annual consumption value which pictures marked with number 2. In this case, the own consumption is 708358 kWh and the export power is 919146 kWh. For an accurate result I must create a load profile, am I right?

Hello Balck

On 7/9/2024 at 6:14 AM, Balck said:

For an accurate result I must create a load profile, am I right?

Yes. For a more accurate result you have to provide PV*SOL with a load profile which resembles reality.
The load profiles from our database are example profiles.

Of course the most accurate variant would be measured values.
It is also always a good idea to ask people on site for typical behaviour of users of the buildings. Maybe you are lucky and they do have some measurements -- at least of some buildings.
In your case you might have insights into public usage plans, vacation days and so on to create your own estimation.

Does this help?

Kind regards
Frederik

1 hour ago, developer_fw said:

Hello Balck

Yes. For a more accurate result you have to provide PV*SOL with a load profile which resembles reality.
The load profiles from our database are example profiles.

Of course the most accurate variant would be measured values.
It is also always a good idea to ask people on site for typical behaviour of users of the buildings. Maybe you are lucky and they do have some measurements -- at least of some buildings.
In your case you might have insights into public usage plans, vacation days and so on to create your own estimation.

Does this help?

Kind regards
Frederik

YES thanks friend