developer_mh

I really don't know what a recommended temperature for West Tunisia would be. In PV*SOL, I had a look at the climate data from Tozeur/Nafta, and the temperature looks like this: Minimum ambient temperature seems to be around 4°C. The cell temperature usually is higher, due to the irradiance, so I think if you go with 0°C cell temperature, you should be safe, even for worst case scenarios. But perhaps there are local guidelines you could follow? Kind regards, Martin

Hi Ahmad, thanks for your question! This temperature refers to the cell temperature. In STC (Standard Test Conditions, for measuring the nominal power, voltage and current), you'll have 25°C for cell temperature at 1000 W/m². But when configuring a system, you also want to make sure that a certain voltage is never exceeded by your PV array, so you'll calculate with lower cell temperatures. So you have to estimate the lowest ambient temperature at the given location (at daytime of course). For Europe, you normally just use -10°C at 1000 W/m² and you are on the safe side. Does that answer your question? If not, do not hesitate to ask! Cheers, Martin

ok, please check your private messages.

Hi Martin, before synthesizing the one-minute data, the algorithm is checking the synchronity of the hourly global irradiance data with the clear-sky irradiance. In your case tha data seem to be synchroneous in the first place, but in a deeper check the algorithm detects a shift of the irradiance distribution to the afternoon. In other words, cumulated over the year, you have more often high irradiance values in the morning than in the afternoon, and the relation of it surpasses a threshold and therefore your data is considered as not in sync. In the next version, the check is a lot less strict and I was able to synthesize your data into one-minute values. So the question would be if you can wait until the new version comes out in mid November? An alternative would be that I provide you the database file that contains the synthesized data. Please let me know what you would prefer. Kind regards, Martin

Hallo Ally, nein, da gibt es leider keinen Trick. Wir haben dieses Feature schon lange auf dem Zettel, das stimmt. Bisher konnten wir es aber noch nicht umsetzen, da uns schlicht die Zeit fehlt. Daher wird es auch leider in der nächsten Version, die im November erscheint, nicht möglich sein, aufgeständerte Anlagen zu verkabeln. Dafür wird es aber eine Menge anderer neuer Features geben, die sich die Leute ebenfalls schon lange gewünscht haben. Man kann es als Entwicklerteam mit begrenzten Ressourcen natürlich nicht allen recht machen, auch wenn man nichts lieber täte. So haben wir eben unsere Todo-Liste, unsere Priorisierung und arbeiten so viel davon ab, wie wir können. In der Hoffnung, dass unser Programm trotzdem eine Hilfe ist im Planungsalltag, Martin

Hallo Goofy, danke fürs Melden! Ja, ist leider ein bekannter Bug, da kann man als User nichts anders machen. Wir haben ihn auf der Liste und werden ihn beheben, sobald die höher priorisierten Bugs behoben sind. Bis dahin muss man wohl oder übel die Antenne manuell wieder zurechtdrehen. Beste Grüße, Martin

Hi Giannis, unfortunately I can't find your bug reports in our system. The only recent bug reports relating to that exception contain a lot of modules and seem to have crashed also while configuring modules. Could you perhaps send us a project file where this crash occurs? This would be very kind. You can send it privately here via private message. And some information about your system woul be very helpful (Windows version, RAM, PVSOL version etc.) Thanks! Martin

Hi Giannis, thank you for submitting this exception. We have some related bug reports already. Can you reproduce it? That is, could you describe a way how to get to this exception? Or does it occur randomly? Which version of PV*SOL do you use? Perhaps we can track this bug down with your help! If possible, also send a bug report when it crashes the next time. Thanks a lot in advance, Martin

Hallo REN, ja, wir glauben auch, dass Mieterstrom-Modelle immer wichtiger werden. Die Thematik sehr komplex, und noch haben wir unsere Wirtschaftlichkeitsberechnung nicht entsprechend angepasst. Wir empfehlen für solche Fälle aber wärmstens das Tool pv@now der Deutschen Gesellschaft für Sonnenenergie: https://www.pv-now.de/ Dort sind alle gängigen Betreibermodelle hinterlegt. Beste Grüße, Martin

Hi Felipe, this would be a good idea actually. Unfortunately we don't speak portuguese. So we will have to ask our partner in Brazil if he is willing to moderate a portuguese forum. We will keep you updated! Kind regards, Martin

Hallo LenLo, wenn du in der Modulverschaltung bist (oben bei den Tabs), und die gewünschten Module markiert hast, machst du einen Rechtsklick drauf und wählst 'Zum Dialog Modulfächen definieren hinzufügen'. Danach die restlichen Module auswählen und ebenfalls zum Dialog Modulflächen definieren hinzufügen. Die so definierten Modulflächen lassen sich jetzt entweder automatisch oder manuell mit einem Wechselrichter mit 2 MPP Trackern verschalten. Viel Erfolg und beste Grüße, Martin

Hi Solcellekonsulenten, thanks a lot for your question. Unfortunately, I can not see the image or the figure that you posted.. But apart from that, we do not calculate with information on snowfall or any other precipitation from the climate data provided via MeteoSyn (which is based on MeteoNorm from Meteotest, Switzerland). So the engineer has to estimate the losses due to snow coverage as well as soiling losses and enter these values in PV*SOL. I think in the future we will be able to provide such a snow model that estimates the snow cover on the modules based on ambient temperature, precipitation, module angle, framing and mounting and so on. We already collected some of these models, but we need to validate them first and for that we need good measurement data and time. Kind regards, Martin

Hi Damon, yes, these 100 W/m² would be equal to a efficiency of 10%. Let me know if you succeeded! Regards, Martin

Hi Damon, you could try to create a new module in the database and enter all the details that you know of so far. The dimensions were published, and if you found out the specific power in W/m² you can calculate the nominal power of a tile by multiplying it by the area. So, one tile is 184 mm wide and 365 mm long, which gives 0.067 m². I don't know the specific power you have found out, but if I should estimate the efficiency of the tiles, I'd say they have around 10 %. This would give a nominal power of 1000 W/m² * 0.067 m² * 0.1 = 6.7 W. Then, when you enter the voltage and current details on the next page, I would recommend to set the number of cells to 2, and adjust the voltage values accordingly. After that, adjust the currents: In the section electrical data set the number of cells to 2. In the STC section, enter the nominal power of 6.7 W in the field top right Change the voltage values to a 2/60th of their original values: MPP: 28.3 V / 60 * 2 = 0.943 V open circuit: 36.1 V / 60 * 2 = 1.203 V The nominal power of 6.7 W is the product of MPP voltage and current, so you have to adjust the MPP current to 6.7 W / 0.943 V = 7.12 A. Since the ratio of MPP current to short circuit current should be left as is, you also have to change the shor circuit current to 7.12 A * ratio_I = 7.12 A * 7.7 A / 7.07 A = 7.75 A The thermal voltage coefficient should be adjusted as well, set it to -0.35 %/K. With those values you should be good to go. Of course that is mere guessing, but if you really want to simulate these systems already, this is what you could do. Kind regards, Martin

Hi Damon, yes, the details on the solar roof of Tesla are very limited, in contrast to their marketing. On their website you can even order them already, without having seen any details/datasheets or whatever. I wonder who does this... but if you find out something, I think everyone here would be happy if you could share it. Thanks and kind regards, Martin

Hi Damon, thank you for your question! Indeed, you cannot enter the number of battery systems right now, this feature will be available in the next version. What you could do for now is to copy the battery system in the database and adjust the power and capacity values accordingly. If you want to go with three Tesla Powerwall systems, you would have to triple the charging power values and the battery capacity, for example. The message that the maximum charging power is insufficient refers to the boost charging mode (U0-charging), which depends on the SOC thresholds of the charging strategy setup and the capacity of your battery. For example, the Tesla Powerwall 2.0 AC from the database has a start SOC of 80% and an end SOC of 100% for the boost mode, which has to finish in 2 hours. The C10 battery capacity is 270 Ah, the batteries run on 50.1 V, so the rated energy would be 270 Ah * 50.1 V = 13.5 kWh. So the power electronics have to charge 20% of 13.5 kWh in 2 hours, which equals to 2.7 kWh in 2 hours. If the charging would run with constant power, one would need 1.35 kW to accomplish that. But the U0 charging modes run with constant voltage while the current decreases exponentially, and because P=U*I, the charging power also decreases exponentially. This is done because batteries need to be charged very carefully when they are nearly full in order to avoid over charging. But this also means that the initial power that is necessary for U0-charging is much higher than 1.35 kW. To calculate the necessary power you'll need to solve the integral of the exponential power curve. In this case the initial power would be around 3.1 kW (where of course the charging voltage is higher than the 50.1 V nominal voltage). I hope this answers your question. If you have any further questions, please don't hesitate to ask! Kind regards, Martin

Hi Martin, you will have to convert the data into the format that you can see at the top of this thread. FF is the wind speed and RH is the relative humidity. From what I understand, this would be UM and FF2 from the AgroMetBase, my Norwegian is relatively limited though The important thing is that you can only import one year of data, and it must be a complete year, with one value per hour. 8760 values in total, otherwise the import will fail. 2013 seems to be complete for example. The name of the location and the coordinates have to go in the header, like so: Skjetlein 63.2027,-10.1802,512,-1,-30 Ta Gh FF RH 4.2 0.0 2.0 69.0 2.9 0.0 1.7 77.4 1.7 0.0 0.2 84.4 1.4 0.0 0.0 87.8 1.3 0.0 0.2 91.0 1.0 0.0 1.4 92.7 ... Notice the coordinates are in degrees and minutes, not decimal, although one might think so from the formatting. The decimal coordinates of Skjetlein are 63.34085° North and 10.3005839° East, which gives 63°20'27'' North and 10°18'02'' East in Degrees, minutes and seconds. So you'll have to put 63.2027 and -10.1802. Mind the negative longitude, as the dat file requires longitudes in Western direction. Also note the negative time zone. Another important thing is that you have only valid numbers in your text file. The AgroMetBase exports NULL if values are missing, which is happening for the temperature in 2013 for example. These missing values have to be filled up. I attached a *.dat file for you that you should be able to import in MeteoSyn. Skjetlein.dat Hope that helps! If you have any further question, please don't hesitate to ask. Kind regards, Martin

Ja, die neue, große Version von PV*SOL premium kommt im Herbst 2017 und wird den Namen PV*SOL premium 2018 R1 tragen, wir ziehen das Jahr immer etwas vor Wenn man zu diesem Zeitpunkt einen gültigen Wartungsvertrag besitzt, bekommt man auch das Update.

Hallo REN, tut mir leid, dass die Antwort etwas auf sich hat warten lassen, ich musste dafür ein wenig recherchieren. Es scheint so zu sein, dass der Skalierungsfaktor, den wir in die dxf schreiben, von den mittlerweile gängigen Programmen nicht mehr richtig interpretiert wird. Ich habe hier das gleiche Problem nachstellen können, in meinem Fall mit AutoDWG. Ich habe das Problem nun beheben können, es wird dann in der neuen Version behoben sein. Solange könnte ein Workaround sein, die richtige Dimensionierung im Programm selbst einzustellen. Bei AutoDWG DWGsee geht das unter Options -> Dimension Settings. Wahrscheinlich gibt es etwas vergleichbares in AutoCad LT. Der richtige Dimension factor wäre hier 1,64 / 9.89 = 0,1658. Ich hoffe, das hilft erstmal so weiter. Wie gesagt, richtig behoben wird das Problem dann in der nächsten Version (PVSOL premium 2018 R1), die kommt im Herbst. Beste Grüße, Martin

Hey Diego, it is possible, you just have to go to the detailed input of the investments, where you can enter a product lifetime / period of use. See the following screenshots for an example: Hope that helps, Martin

Hola leo, which version of PV*SOL do you have installed? The 3D map feature was introduced in PV*SOL premium 2016 Release 1 (November 23rd, 2015). Check if you have the most recent version installed, which is PV*SOL premium 2017 R9. Un saludo Martin

Hallo Michael, welche Version hast du denn installiert? Hast du das neuste Datenbank-Update eingespielt? Testweise mal unter "Hilfe -> Auf Updates prüfen" schauen, ob Updates da sind und wenn ja, installieren. Tritt der Fehler bei allen Projekten auf oder nur bei einem speziellen? Kriegen wir schon hin Das Update bei Goofy war ein Datenbank-Update, wir gehen also davon aus, dass das Problem bei seinen Symptomen mit einem kaputten Datenbank-Eintrag zu tun hatte. Beste Grüße, Martin

Hi leoramirezm, when you start into the 3D environment (or start a new project from within the 3D environment), you can select the map section from the drop down: That is, you can't add a map section to an existing project, you'll always have to start with a map and add your objects afterwards. Does this answer your question? Kind regards, Martin

Hi Abraham, thanks a lot for your question. The thing is that the ABB Trio 27.6 kW inverter has to MPP trackers. If you connect 20 Jinko PV modules with 315 Wp on each of them, you will have a DC side power of only 2 * 20 * 315 Wp = 12,6 kWp, whereas the inverter has a rated power of 27.6 kW. The inverter will be underdimensionened by more than 50%, which one try to avoid because of the relatively high inverter losses. But anyways, you can configure the system as you wanted: Just choose the Jinko modules on the PV module page and enter a total number of 40 modules there. Then switch to the inverter page and enter your inverter manually. When you click on the red cross or green ticks left to the configuration table, you'll see the configuration check in order to verify what is wrong with your system: You see that for the MPP voltage and current limits everything is fine, but when you look at the inverter level (marked with a red cross in the tree view), you'll see that the dimensioning factor is only 45 %, while it should be around 100 %: I hope that helps, kind regards, Martin

Hallo nochmal, also, unsere Hotliner meinen folgendes: Jetzt hattest du gesagt, dass du keine Drucker installiert hast, aber vielleicht hast du ja einen pdf-Drucker oder den Windows XPS-Dokumentendrucker? Ansonsten würde ich dich bitten, dich dann mit deiner Kundennummer bei unserer Hotline zu melden (hotline@valentin-software.com), die wissen dann schon Bescheid und werden ihr Bestes tun, um den Fehler zu reproduzieren und Abhilfe zu schaffen. Beste Grüße, Martin