SailNet Community - View Single Post - More on solar panels.
View Single Post
post #26 of Old 03-30-2008
camaraderie's Avatar
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 6 Times in 6 Posts
Rep Power: 17
To maybe put it a bit more simply...even if your batteries are discharged to 12.25V (50%) and your 2W panels tries to deliver current at will only develope less than .2 amps. Given a 5 hour direct sunlight equivilent...this means that over a day..less than one amphour will be stored in your battery. If the bilge pump kicks on, or your radio memory or TV standby function is on you will probably use more than this...hence the lower readings at night. Furthermore...on a 200 amp bank of wet cells..the self discharge rate can easily be in excess of 2 amps per day.
So...briefly...a 2 watt panel is a waste of time and money. Try 20 watts!

No longer posting. Reach me by PM!
camaraderie is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome