2011 PRINCE GEORGE, BC SOLAR HOT WATER HEATING
Apricus evacuated tube SDHW collector (Two 30-tube collectors)

Sun Data Water Heating
2011 Monthly
Peak Sun
Hours		 Daily
Peak Sun
Hours		 Electric
Backup
kWh		 Solar
Heater
kWh		 Solar
% of Total		 Notes
Jan 32 1.02 67 108 61.74 most of the bright sunshine came near the end of the month
Feb 62 2.23 43 230 84.17 6 days very high production. 7 days almost no production
Mar 103  3.31 20 398 95.24  
Apr 150 4.99  4  458  99.08   
May 139  4.49  17  489  96.69   
Jun 142 4.72 25  508 95.26   Unusually cool & cloudy for June
Jul            
Aug            
Sep            
Oct            
Nov            
Dec              

2011 Seasonal Average Peak Sun Hours


Season Monthly Daily


Spring (Mar, Apr, May) 131  4.4 


Summer (Jun, Jul, Aug)    


Autumn (Sep, Oct, Nov)    


Winter (Dec, Jan, Feb) 41   1.41  (Dec 2010)
Annual Average    

2011 Apricus Monthly & Annual Summary
 

Collector
ēC		 Tank Bottom
ēC		 Tank Top
ēC		 Hx Return
ēC		 Pump
Run
Hours		 Heat
Collected
Kwh		 Heat (Kwh) Collected per Run-Hour

Min Max Min Max Min Max Min Max
Jan -27.7 65.7 16.7 57.6 19.7 64.1 20.0 64.8 47 108 2.3
Feb -35.0 72.8 15.7 60.4 25.1 67.4 22.6 68.5 109 230 2.1
Mar -26.0 72.8 19.7 59.6 29.3 66.1 23.4 67.5 205 398 1.9
Apr -8.2 69.8 26.4 58.3 39.2 64.7 26.8 64.9 71 114 1.6
May -2.25
 78.8
 19.3
 62.7
 31.4
 70.4
 22.6
 72.2
 305
 189
 1.6
Jun










Jul










Aug










Sep










Oct










Nov










Dec






















Annual -35.0 72.8 15.7 60.4 19.7 67.4 20.0 68.5 432 850
Average






















The collector minimum temperature is approximately the overnight low temperature. As you can see, here in the valley, even when daytime highs are in the +30's, it cools off very well at night.
The steep 68° mounting angle maximizes winter production and reduces summer over-heating.