However,there will be a large conduction heat loss through both glass and wall in the morning at that time of year.
in august the shgf = 216, almost as large as in april, so the total heat gain will be maximum in august.
shade
for east - facing glass, maximum solar load is in early or mid-summer in the morning.
required at a few different times
another point that needs comment here is the possibility of peak load in april,