perryfranz
New Member
- Joined
- Aug 31, 2022
- Messages
- 39
Hello!
in my house I had since 2016 this SMA sunnyboy 3000 powered by 12 solarworld SW 250 poly (250Wp) and this system has produced 27860MWh in it's lifetime (noth east of Italy) without ever a single failure.
Now the region where I live, Friuli Venezia Giulia (FVG), has released 100million€ non-repayable for a maximum of 40% of the expenditure incurred in a incentive to encourage the installation of photovoltaic systems and storage in private homes. (you can find details here)
Furthermore, it is possible to combine it with a 50% of the remaning cost recovery with a return on taxes in 10 years.
I seized the opportunity to improve the solar power and installing a battery, even if my economic possibilities are not very high.
The company where I work now is the same that has installed the old system with the SMA, so I basically made by myself all the project and all the bureaucracy that we need in Italy... lot of work only for papers...
I wanted to add another 3kW of panel in order not to exceed the limit beyond which a three-phase system is required, i.e. 6kW in single phase.
I choose the 405Wp Sunpower P6 performance, 6kW Huawei Sun 2000 (inverter) and 10kWh of Huawei Luna (battery).
I wanted to mantain a good panel on the roof as my old solarworld, but the Sunpower Maxeon are out of range for me.
I could use other panel to mantain the same colour of the older... but for me it's not really a necessity to have a pretty roof, even the tiles are strange for an Italian house
The roof has an enormous quantity of space but I need to stay away from the wood stove chimney (on the right) and maintain a safe space to exit the attic skylight, so the best design for the new panels (that are huge in comparison with the older one) is an L following the old panels. No, 8 panels don't fit on the lowest part of the roof
Now the system is connected and fully working, with those last days of sun I can easily pull out 29kWh (the house need only 12kWh, so I sell the remaining 17kWh to the grid, not a bad deal).
I only have a problem, but it's linked to the age of the national electricity grid in my area, basically my Vac sometime get over the 250V and the inverter trim the production to not exceed the threshold of 253Vac as you can see in the graph:
The resolution of this problem is quite easy, they need to replace the cables with others of larger cross-section from the grid to my meter, but it's something that Enel (the Italian electricity network manager) is not gonna do because it's pricy. Unfortunately it's a common problem here in Italy and many many people are mad with their installer for this.
For my power consumption now I'm almost independent from the electricity grid which is only used on long days of bad weather after the battery drained all the capacity. But this system is not made to make me offgrid.
I think that this system after all can give me enough power even if i buy an electric car.
After 10years this system is going to cost me basically 4541€ and it's not bad, but 17490€ for a new system they are difficult to support financially.
I really hope that in future these practices become increasingly common to help reduce dependence on the grid and try to be as self-sufficient as possible.
I hope you enjoyed this story of my new system!
Have a nice day!
in my house I had since 2016 this SMA sunnyboy 3000 powered by 12 solarworld SW 250 poly (250Wp) and this system has produced 27860MWh in it's lifetime (noth east of Italy) without ever a single failure.
Now the region where I live, Friuli Venezia Giulia (FVG), has released 100million€ non-repayable for a maximum of 40% of the expenditure incurred in a incentive to encourage the installation of photovoltaic systems and storage in private homes. (you can find details here)
Furthermore, it is possible to combine it with a 50% of the remaning cost recovery with a return on taxes in 10 years.
I seized the opportunity to improve the solar power and installing a battery, even if my economic possibilities are not very high.
The company where I work now is the same that has installed the old system with the SMA, so I basically made by myself all the project and all the bureaucracy that we need in Italy... lot of work only for papers...
I wanted to add another 3kW of panel in order not to exceed the limit beyond which a three-phase system is required, i.e. 6kW in single phase.
I choose the 405Wp Sunpower P6 performance, 6kW Huawei Sun 2000 (inverter) and 10kWh of Huawei Luna (battery).
I wanted to mantain a good panel on the roof as my old solarworld, but the Sunpower Maxeon are out of range for me.
I could use other panel to mantain the same colour of the older... but for me it's not really a necessity to have a pretty roof, even the tiles are strange for an Italian house
The roof has an enormous quantity of space but I need to stay away from the wood stove chimney (on the right) and maintain a safe space to exit the attic skylight, so the best design for the new panels (that are huge in comparison with the older one) is an L following the old panels. No, 8 panels don't fit on the lowest part of the roof
Now the system is connected and fully working, with those last days of sun I can easily pull out 29kWh (the house need only 12kWh, so I sell the remaining 17kWh to the grid, not a bad deal).
I only have a problem, but it's linked to the age of the national electricity grid in my area, basically my Vac sometime get over the 250V and the inverter trim the production to not exceed the threshold of 253Vac as you can see in the graph:
The resolution of this problem is quite easy, they need to replace the cables with others of larger cross-section from the grid to my meter, but it's something that Enel (the Italian electricity network manager) is not gonna do because it's pricy. Unfortunately it's a common problem here in Italy and many many people are mad with their installer for this.
For my power consumption now I'm almost independent from the electricity grid which is only used on long days of bad weather after the battery drained all the capacity. But this system is not made to make me offgrid.
I think that this system after all can give me enough power even if i buy an electric car.
After 10years this system is going to cost me basically 4541€ and it's not bad, but 17490€ for a new system they are difficult to support financially.
I really hope that in future these practices become increasingly common to help reduce dependence on the grid and try to be as self-sufficient as possible.
I hope you enjoyed this story of my new system!
Have a nice day!
