How to calculate a battery capacity

I'm working on a project in wich I need to have a system running 24hrs
a day , power supply will be solar panels feeding a battery. Can any
one share with me formulas on how to calculate de Amp/hr for the
battery and the power of the solar panel?
Systems will consume average 80watts and need to keep running on a few
clowdy days as well.
Thanks for the assistance!

.

Relevant Pages

  • Re: Solar Powered Systems
    ... For quite a while I have been running some FBI XL31Bs on solar panels using ... and run ac power to these buildings but its a long run of several thousand ... range radio that also use solar panels. ... panels and battery boxes with several batteries in them; ...
    (alt.security.alarms)
  • Re: Battery to Battery Chargers
    ... to stay on the CL type sites for longer without resorting to mains ... At the Roadpro stand I was advised that I should fit a 'Battery to ... Battery' charger first. ... I have scanned the newsgroup and although solar panels are a recurring ...
    (uk.rec.motorcaravans)
  • Re: Solar Charger Question
    ... conditions where the battery is NOT connected. ... the battery during full sunlight conditions and where the load is off, ... ohmic value series power resistor should fix it though. ... glass covered solar panels with attached ...
    (sci.electronics.design)
  • Re: XPe corruption with sudden power failure using flash module
    ... We have an XPe system running on an IDE flash module with a battery power ... Sudden power failures do not seem to corrupt Win XP systems running on a ...
    (microsoft.public.windowsxp.embedded)
  • Solar Panel availability
    ... different sized solar panels used to charge car batteries. ... proof in a frame, and varied in size form about 12 inches by 4 inches, to ... motorcycle battery between uses on a hovercraft that I own. ...
    (sci.electronics.basics)