tsarbiker

Hi, Let's have A: and B: B and A are exactly the same setup (PV, PV mount and location, Battery, home energy consumption). B is significantly worse then A in term of energy used from the grid and energy exported. So what changed :D:D! The electric car settings . What I want to point out here is that code wise, there is room for improvement. The combination of desired range per week and entering the time when car the car is plugged in, leads to incorrect estimate in my case. I drive Monday to Thursday around 40km twice per day. Friday around 300km and Sunday around 75km. If I enter the data previously mentioned I get: That is not correct, it thinks I drive more per drive then I really do and that leads to incorrect estimate in my case. To fix this I have to duplicate my car :D:D. I now have 3 cars. 1. Drive Monday to Thursday - 420 km 2. Drive Friday - 300 km 3. Drive Sunday - 75km I also have to set the time when they charge so that they are never at the same time at the charger as obviously we only have one car :). This gives me a better trip length assumption during the week: It would be great if there was an alternative way to enter the correct data. Maybe the possibility to enter your mileage for each day of the week. As you have seem from the pictures, I have the charging mode set to PV optimized and automatic phase switching. I assumed that in that case it would charge using what solar is available during the day and when it reaches closer to the next trip charge at full speed to get back to a fully charge car. In practice, as soon as the car is plugged, it will charge directly at full charging speed so 11kw continue until car is charged. To avoid that I created a copy of the Tesla model 3 and set the charging speed to 1.4kw and used that setting for my 3 cars :). The car is now able to use more of the energy from the PV, instead of the battery or the grid. It would be nice if you could set a minimum charge that the car need to have. By default the car uses only solar (only charge when solar is there and to the speed that the solar provide) and only if it sees its not gonna reach the minimum charge before the next trip starts, it start charging at max speed. This would also help in the case where someone doesn't drive much. If one day there is not much solar, the car will not charge much on that day (if it is not lower then the minimum charge level) and wait for the next day. This would overall lead to way better self consumption. All these modifications lead to a 1100+kwh/year difference, that's quite significant :). Thank you for this great software and all your hard work.

Hi, It is difficult to know without knowing more about the setup. Do you have the option to do a dummy file with the same setup you could upload here? What version of the software are you using? Have a nice evening

This is awesome , it makes sense now . Thank you!

Hi, I have been comparing 2 systems. They are the same except one has one hybrid inverter and the second one has an inverter + an battery inverter. What I would expect is that the system with the DC coupling would be more efficient. It doesn't have to do DC-AC AC-DC but just DC-AC to provide electricity for the load. In practice they are extremely similar and I just don't understand how that is possible . The losses for the battery is almost the same, I would expect double the amount for AC coupling. How is this possible? Thanks! BatteryAC.pvprj BatteryDC.pvprj

Hi, Thanks for the message, I sent the files .

Hi, I have a battery related question. I have the following 2 scenarios: 1. 12kw PV system with 12kw Inverter, BYD HVM22.1 battery connected to a second 10kw inverter. This gives you the following overview: And if I take a specific day: We can see that around 8 the electric car start charging and takes energy from the home battery to do so. In the evening the car is charged again but this time it takes energy from the grid even though the home battery is almost full. Now setup 2 -> 2. 12kw PV system with 12kw Inverter, BYD HVM 11.0 battery connected to a second 10kw inverter + BYD HVM 11.0 battery connected to a third 10kw inverter. This gives you the following overview: And if I take the same specific day: You can see that at 8 and in the evening the car battery is charged with energy from the home battery. The overall efficiency of the system is better when there are 2 smaller batteries with an inverter for each. I do not understand why... The total battery size is the same in both scenario. Is this a bug? Is there something fundamental I do not understand? what is going on? Let me know if you need more info. Thanks!