Tweet
Hello guys,
Could anybody check whether my selection of solar panel correct or not?
Lamp consumption
Lamp voltage=100W
Daily operating hours = 9 hrs (only work at night)
Autonomy days = 2 days (last 2 days with no sun/rainy days)
Battery Sizing (24V)
Total watt hour per day = 100Wx9hrs = 900Whrs/day
2 days autonomy = 1800Whrs
Account battery loss 15% = 1800/0.85 = 2117.6Whrs
Account deep discharge 40% = 2117.6/0.6 = 3529.4Whrs
Required Battery size = 3529.4Whrs/24V = 147Ahr ~ select 2pcs of 12V 150Ah battery connect in series
Solar Panel selection
Total watt hour per day = 900Whrs/day
(here i am not very sure should I multiply 2 autonomy days or not, because I saw a few sites they didn't include the autonomy days in their calculation for solar panel)
Reference: http://www.leonics.com/support/artic...es2_12j_en.php
Account for system efficiency 80% = 900Whrs/0.8 = 1125Whrs
Daily Sun hours (insolation at my location) = 4.17hrs
Required panel Wattpeak = 1125Whrs/4.17hrs = 270Wp ~ select 2 pcs of 140Wp solar panel (but i am not sure if solely choose from the catalogue Wp correct or not)
I am not sure whether have to take into account of the Vmp and Imp when selecting solar panel and whether to connect it to series/parallel. Should I calculate the current?
I appreciate if you guys could give me some feedback or guidance on this. Sorry that I'm not very good in electrical stuff.
Thank you.
Could anybody check whether my selection of solar panel correct or not?
Lamp consumption
Lamp voltage=100W
Daily operating hours = 9 hrs (only work at night)
Autonomy days = 2 days (last 2 days with no sun/rainy days)
Battery Sizing (24V)
Total watt hour per day = 100Wx9hrs = 900Whrs/day
2 days autonomy = 1800Whrs
Account battery loss 15% = 1800/0.85 = 2117.6Whrs
Account deep discharge 40% = 2117.6/0.6 = 3529.4Whrs
Required Battery size = 3529.4Whrs/24V = 147Ahr ~ select 2pcs of 12V 150Ah battery connect in series
Solar Panel selection
Total watt hour per day = 900Whrs/day
(here i am not very sure should I multiply 2 autonomy days or not, because I saw a few sites they didn't include the autonomy days in their calculation for solar panel)
Reference: http://www.leonics.com/support/artic...es2_12j_en.php
Account for system efficiency 80% = 900Whrs/0.8 = 1125Whrs
Daily Sun hours (insolation at my location) = 4.17hrs
Required panel Wattpeak = 1125Whrs/4.17hrs = 270Wp ~ select 2 pcs of 140Wp solar panel (but i am not sure if solely choose from the catalogue Wp correct or not)
I am not sure whether have to take into account of the Vmp and Imp when selecting solar panel and whether to connect it to series/parallel. Should I calculate the current?
I appreciate if you guys could give me some feedback or guidance on this. Sorry that I'm not very good in electrical stuff.
Thank you.