All Activity

Dear Mark, We apologise: for lithium iron phosphate batteries, the reference value used to calculate discharge cycles is not a DoD of 60% (as with lead-acid batteries), but a DoD of 40%. You can simply enter these four values manually: We are still awaiting feedback from our development department regarding the formula.

Any feedback on my post?

Hello, Thank you for your inquiry. We confirm that in PV*SOL premium 2026, you can only generate new climate datasets using Meteonorm 9 data. However, you can continue to use your own climate datasets based on Meteonorm 8.2 data for simulations. If you select a custom climate dataset based on Meteonorm 8.2 data from the drop-down menu in PV*SOL premium 2026, the simulation will be performed using Meteonorm 8.2 data. Unfortunately, we are not permitted to integrate multiple Meteonorm versions into a single version of PV*SOL premium. We obtain the data from Meteonorm and have no control over the data itself; we simply integrate it into PV*SOL premium. Therefore, only the current Meteonorm 9 version can be used in the current version of PV*SOL premium 2026. If you wish to work with Meteonorm 8.2 data, you must use PV*SOL premium 2025 R10. We have sent you an email with the download link. Before doing so, you must uninstall two applications: both PV*SOL premium 2026 and MeteoSyn. If you wish to use PV*SOL premium 2026 on a second computer, you can transfer the Meteonorm 8.2 data from the first computer to the second by importing the WBV files from the directory "C:\ProgramData\Valentin EnergieSoftware\MeteoSyn\WBV\_userfiles\ZAF" into PV*SOL premium 2026: Any project file (*.pvprj) started in PV*SOL premium 2025 R10 can be opened in PV*SOL premium 2026. The climate dataset based on Meteonorm 8.2 data will then be automatically added to the list of available climate datasets in PV*SOL premium 2026.

We are currently on Meteonorm 9.0, is it possible to run a simulation using older Meteonorm 8.2? When I select the attached my simulation still runs using Meteonorm 9.0.

You have to be in the "Object View" - Tab to see this right-click option. It does not work in any other view, especially "Module Coverage", which confused me in the beginning.

Dear Haydn, Thank you for your inquiry. In the hourly simulation, hourly generation and consumption values are simulated and compared, and the self-consumption rate is determined from them. With a generation of 800 kWh and a consumption of 1,000 kWh, self-consumption in that hour is 100%. In the minute-by-minute simulation using half-hourly consumption values, minute-by-minute generation values are compared with half-hourly consumption values. No minute-by-minute consumption values are generated.

Dear Mark, Thank you for your inquiry. The commas must be removed. Please find enclosed the CSV file we have edited. Wannie Zorzetto Load Profile VAL.csv

Hello, Thank you for your inquiry. You can activate the roof surfaces by right-clicking --> Activate. This switches the view from terrain to object mode, allowing you to place panels on the roofs. This YouTube tutorial explains the activation process at the 05:00 mark.

When I try to change the value at 60% DOD to 10000 and do the Calculate cycles then that value just returns back to the values that it was. Nothing changes. Also please give me the formula to determine a batteries DOD at 60% from the datasheet.

Hello, I am completely new to the software and struggling with FAQ and first steps. Successfully created a testing environment and created multiple houses but the software will only let me place solar panels on the ground and not on roofs. Probably something really simple but neither Google search nor FAQs could help. How do I tell the software that I want to place solar panels on roofs? Sorry this probably sounds really stupid and I am not a native English speaker. Just really frustrated after multiple hours into test project and search and not being able to find a solution ... THANK YOU for your help!

Thanks for your response. Is the self consumption calculation as simple as if 800kWh were generated and 1000kWh consumed in 1h, then self-consumption is 100%? If yes, then this will always overestimate self-consumption, as generation & site demand are not usually fixed at a given power for 1h. Within that hour there are likely to be periods when generation exceeds demand, and self-consumption will be less than 100%. If I select 1-minute simulation, but I have only input half-hourly data, will PVSol synthesise minutely consumption data? Thanks, Haydn

Good Day, I am trying to load a customers Day Profile but I am getting this error. Please assist. Wannie Zorzetto Load Profile.csv

Dear Haydn, Thank you for your inquiry. If you select multiple load profiles (whether imported by you or built into the program), they are aggregated into a total consumption figure for the simulation. In the hourly simulation, the self-consumption share is calculated for every hour of the year by determining what percentage of consumption can be covered by PV energy. Hourly simulation is the standard. However, when importing load profiles, you can also import data with 1-, 5-, 10-, 15-, or 30-minute intervals and then run the simulation on a minute-by-minute basis to obtain more precise results.

Hallo, vielen Dank für Ihre Anfrage. Wir haben soeben die Hilfe zur Rexplorer API veröffentlicht. Um sich registrieren zu können, müssen Sie eingeloggt sein. (Ein Test innerhalb der Testversion ist nicht möglich.) Die ersten 10 Standorte sind kostenlos. Danach können Sie in den bezahlten Tarif wechseln (dann unbegrenzter Zugriff). Für jede Standort-Anfrage erhalten Sie alle Gebäude in einem Umkreis von 100 m. Die Rexplorer API ist nicht mit der Google Solar API kombinierbar. Auf der Intersolar in München vom 23. bis 25. Juni 2026 werden wir die Planung mit der Rexplorer API live zeigen. Sie finden uns am Stand A4.331.

Im neuen Update gibt es eine Schnittstelle zur Rexplorer API. Außerdem gibt es auf der PV*Sol Premium Website einen Link zu https://pvsol.rexplorer.ee/de/ Ansonsten kann ich nicht viel darüber finden. Automatische Erstellung von 3D Gebäuden klingt interessant, vor allem für 19,90 € im Monat. Gibt es die Möglichkeit das ganze zu testen? Wie kombiniert sich das mit der Google API (3D-Daten)? Gibt es Erfahrungswerte oder Aussagen wie genau die Erstellung ist?

Hello, If I import HH data into PVSol, does it use this when calculating self-consumption with an hourly simulation, or does it add the 2 HHs together and use hourly data? Further to the above, is the formula used to calculate self-consumption % simply 'if consumption is greater than PV output then 100%, if not then = consumption/pv output'? This would essentially assume that PV output and site demand is completely flat for each simulation period. Thanks, Haydn

Hello, Thank you for your inquiry. PV*SOL is generally suitable for retrofit string redesign of existing rooftop PV systems, subject to the following limitations: The 3D visualization allows a maximum of up to 7,500 elevated modules or up to 10,000 roof-mounted modules. You can only simulate the entire system, comprising 13,000 modules, in the 2D planning tool. For 3D planning (including shading analysis), we recommend that you split your overall project into two or three sub-projects. There is also an area limitation. When planning with the Google Solar API or with a map section from another provider, you are limited to a size of 200 m x 200 m. If your overall system is larger, you will need to simulate sub-systems. When carrying out 3D planning, please follow our guidelines on dividing large systems into subsystems so that you can make changes at a later stage or create different retrofitting options. Save different retrofitting versions in separate project files. By selecting ‘File’ --> ‘Project Comparison’, you can compare the simulation results of up to 6 project versions.

Hello everyone, I am currently working on a university project involving an existing large rooftop PV system. The system consists of more than 13,000 PV modules in total, distributed across many strings, existing generator junction boxes (GAK) and inverter units. Due to a requirement from a regulatory authority, several modules in the upper roof rows have to be removed because they extend beyond the roof ridge. As a result, parts of the existing PV generator field must be redesigned to remain compliant while minimizing energy losses. My task is not to design a completely new PV system from scratch. Instead, I have to evaluate and optimize an existing installation after the removal of several hundred modules. The project includes: analysis of the existing PV generator field, development and comparison of different retrofit solutions, redesign of the string layout, reassignment of strings to existing generator junction boxes (GAK), verification of electrical constraints such as string voltage, current, inverter limits and MPPT operating range, evaluation of whether existing cabling can continue to be used, consideration of possible shading effects, adaptation of the existing string monitoring system, and comparison of the technical and economic impacts of different solutions. My question is: Would PV*SOL Premium be a suitable tool for checking and validating such retrofit variants? Or is this type of task usually better done manually, for example by using the existing string plans, module and inverter datasheets, Excel calculations, and separate electrical checks? I am especially interested in how such retrofit projects are normally handled in practice: Do engineers usually model the modified system in software, or do they mainly redesign the strings manually and then verify voltage, current and inverter limits separately? I would be very grateful for any practical experience or recommendations. Thank you very much.

Hello, Thank you for your message. We have forwarded your suggestion to our development team and thank you for bringing this to our attention.

Dear Alberto Perez, Thank you for your inquiry. If you are missing datasets, the best approach is to email hotline@valentin-software.com with the exact model designation or the datasheet. We will then contact the manufacturer and request that the missing products be added. You can create datasets yourself, subject to the following limitations: Data on low-light performance is usually unavailable for PV modules. You can either select the "Standard low-light performance" option or copy the low-light performance data from a similar module. Efficiency curves are usually unavailable for inverters, so you must copy the efficiency curve from a similar inverter. For battery systems, ensure that the lower value is always used when there are differing charge/discharge power ratings for the inverter and the storage unit. Custom datasets can be imported; supported formats are PAN for PV modules and OND for inverters.

NOCT type mathematical model for predicting solar PV cell temperature in floating photovoltaic systems is now available. https://www.linkedin.com/posts/activity-7467494042705088512-5aKj

Good afternoon, I am trying to add new modules, inverters and pannels to my database, but on the mayority of data sheets from products I dont get all the specifications that PV sol asks me of. I add an example image. How would you fill up the data of the following inverter and batteries. https://oss.tcldigitalpower.com/1/file/2026/03/20260325092044182_6fyaq0tx4csr.pdf

Dear Mark, Thank you for your inquiry. Since you cannot enter 8,000 cycles at 70% EOL (DoD), enter 10,000 cycles at 60% EOL (DoD) (and have the remaining values calculated).

Good Day, I want to make sure if my calculations are correct. I added a Dyness PowerBlock Max 16kWh battery to the database. Please just check if my Discharge Cycles are correct below:

Dear Mark, Thank you for your inquiry. Your ridge is not centered. Consequently, the roof pitch is 22 degrees on the south side and 25 (or 27) degrees on the north side. If you have a symmetrical roof, check the box for "centered." If you change the roof pitch, the existing configuration will unfortunately be deleted.