bendesa1962

Hello, During the design of a stand alone system I get the orange warning "Array Oper V X X G T Battery Charge V Y Y, This will result in not optimal use of the PV modules (MPP loss)" It's not clear what this means? What do I need to do to solve this? Many thanks Kind regards Ben

Never received an answer...............

Hi all, I have a question about the simulation results of an Off Grid PV System. Available energy is 1568 kWh/Year Total consumption is 1401 kWh/Year (1252+149 = 1401) Missing energy is 149 kWh/Year How is it possible that the available energy is 1568 - Total consumption is 1401 and still missing energy? I would expect if 1568 is available and 1401 is the consumption that it is enough. What is the explanation for the Time Fraction? What is cycles SOW? Static SOW? I hope somebody can explain this to me Many many thanks Kind regards

Hi, I do get the following error message but I don't understand what it means and how can I make a correction so the error will not appear? ( Array Oper V X X G T Battery Charge V Y Y, This will result in not optimal use of the PV modules (MPP loss). Many thx Kind regards

What would be an acceptable Performence Ratio for a stand alone Off Grid PV System? Many thanks Kind regards Ben

Hello all, I have a question about the simulation results of two simulations. Simulation 01 Stand alone 4,400 Wp 8 x 550 watt panels 3 x 48Volt 100Ah Daily Consumption 10,5 kWh Location Nabire Indonesia Simulation 02 Grid Tied 4,400 Wp 8 x 550 watt panels Location Nabire Indonesia The capacity of the PV Modules is exactly the same. Same panels are being used and also the location is the same. Tilt and orientation is also the same. Let's have a look at the results Simulation 01 Simulation 02 When we look at the specific production we see 1668 kWh / kWp / Year vs 1463 kWh / kWp / Year. How is that posible? The energy generator is exactly the same. According to me this is impossible? Because of the difference as discribed above also other numbers are difficult to understand for me. Produced Energy vs Available Energy = 6440 kWh vs 7338 kWh How is that possible? How can you produce more energy with 4400 Wp if the system is standalone compared with a Grid Tied System? I hope someone can explain to me. Many thx Kind regards Ben

Hi, Thanks for your reply. Actually there is no other errormessage. Here's the screen. Perhaps that gives you context

Hello, many thanks for your reply. Yes I have noticed that the missing energy can be seen in the diagram per month. I'm playing a bit with the simulation of PVSyst with different Off Grid Designs. I must say that I don't understand the behavior of the simulation completely. But probably that's because of my lack of knowledge (-: I also don't understand all terms mentioned in the simulation report. I hope you can help me out. I already want to thank you for that. First the load profile for the stand alone system: The first system I designed has the following components: 3,300 Wp PV Modules Longi 6 x 550 Watt Mono Lithium batteries 3 x 48volt 100Ah Outback Flex Max 60 The main results for this system are: Actually there is a lot of excess (unused) energy. The performance ratio is bad 55% Missing energy is only 1.6% of the time, that’s good How can we make this system better? By better I mean: Better Performance Ratio Less unused energy. Since there is a lot of unused energy I would expect that we can make the system smaller: The second system I designed has the following components: 2,200 Wp PV Modules Longi 4 x 550 Watt Mono Lithium batteries 3 x 48volt 100Ah Morningstar Tristar 45 36 / 48 The main results for this system are: I have the following questions about these main result: How can the specific production be 720 kWh/kWp/year compared with 1661 kWh/kWp/year of the first design. I would expect it to be close to each other. The available energy is absolutely not enough to support the daily consumption of the household. 10.5 kWh. 365 x 10,5 kWh = 3833 kWh Available energy = 1583 kWh How can the simulation mention unused energy 1346 kWh, that is not possible in my view. There is a lack of energy of 3833 - 1583 How can the simulation mentioned missing energy 0 kWh / year How is this possible? Actually this looks like the most optimal system. Performance ratio is good, no missing energy. So this looks like the best solution. But I really have my doubts about it. But I hope you can explain it to me. Can you give some explanation about the terms SOW ? And why does the simulation of design 2 gives a battery life of 5 years while design 1 doesn’t? Many many thanks Kind regards Ben

Hello, During the design of a stand alone system I get the orange warning "Array Oper V X X G T Battery Charge V Y Y, This will result in not optimal use of the PV modules (MPP loss)" It's not clear what this means? What do I need to do to solve this? Many thanks Kind regards Ben

Ok, Thank for your reply. I think that choosing an other profile is the solution right? I did go for daily load

Thanks,that did work out!

I'm working on a stand alone system and have a question about the simulation result. Actually the system is producing way to much energy compared to the consumption. Excess Unused Energy is 1437 kWh per year But still there is a Missing Energy Quantity of 97kWh per year. I don't understand that to be honest? Hope someone can help me out Many thx Ben

Hello all, For a stand alone PV System I would like to define the user needs. Unfortunately I can only define 7 electrical appliances. How can I add extra lines to this user needs? That would be very helpfull Thanks

Hi all, I have a question about the differences in simulation results between Helioscope and PVSyst. The simulation results of PVSyst are quite different. I even have clients who no longer want me to use PVSyst, but who force me to work with Helioscoop. I don't really want that at all. I find PVSyst much more pleasant to work with. Are there others who have experience with this? For example, for a project the following differences. Helioscope 1,190 kWh / kWp / Year PVSyst 1,412 kWh / kWp / Year. Of course, the PVSystems are the same and yet these differences?