I’m working on a project/proposal of a solar panel for my school. To conserve the environment, money isn’t a problem since school got loads xD
My proposal is just to prove that usage of solar panels is more greener…For this i’m stuck at a place where i have to decide how many panels i’ll be needing and of what power…what batteries i’ll require..and things like that and also which direction should they be facing (PV solar panels)
- Out of 365 days, our school consume electricity during 180 days (rest are holidays)
- School consumes about 253 kWh per day, or 45000 kWh per year (180 days approximetly)
- The school is situation in western Europe (Switzerland), not on a hill or something…
- Area of the roof is about 1925 m squared.
Price doesn’t matter, i just want to know how i can place the PV panels and how many i’ll be needed, towards what direction they’ll be placed and how many batteries i’ll be needed to save electricity + consume is during the day.
Please tell me the formulas of how you’ve calculated all this so that i can put that in technique (calculations) section. I am doing this first time to i hope it works out.
Thanks a lot for any kind of help in advance !
253kwh over say 7 hours is around 35 kilowatts all the time. The PV panels for home use here give 5kw and are about 3 square meters, so you might need 20 sq m. However, the bigger a panel is, the less efficient (for technical reasons I don’t understand) so maybe 30 sq m. If you are not going to store the electricity in batteries, you need to be able to generate enough for the maximum peak load at whatever time of day that is, perhaps 9am or 10am. The peak may be 70kw?
It is probably not cost-effective to install panels for use 180 days a year, especially if you have holidays in July and August when there is most sun.
Some countries let you sell the generated kwh back to the electricity company at a good rate. This is much more cost-effective than you actually using your own power, and it works 365 days a year. Another financial incentive can be grants to help with purchase and installation. hope your project goes well.