Comments on: If I Connect Solar Panels, A Battery, And A Load, Can I Figure Out How Long It Lasts? http://www.solarpowerforhome.userreviews.net.au/best-solar-panels/if-i-connect-solar-panels-a-battery-and-a-load-can-i-figure-out-how-long-it-lasts/ Everything To Install Solar Power To Your Home Tue, 03 Jan 2012 20:00:36 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Doubter http://www.solarpowerforhome.userreviews.net.au/best-solar-panels/if-i-connect-solar-panels-a-battery-and-a-load-can-i-figure-out-how-long-it-lasts/comment-page-1/#comment-6156 Doubter Sun, 07 Nov 2010 16:15:22 +0000 http://www.solarpowerforhome.userreviews.net.au/best-solar-panels/if-i-connect-solar-panels-a-battery-and-a-load-can-i-figure-out-how-long-it-lasts/#comment-6156 Hi, If i am using a 12v 12W solar panel to charge a 12v deep cycle battery, and a 12v load connected parallel to the battery, My problem is, how to make the load 'work' or discharge the battery through the load when the sun is below the battery voltage, what shall i need to connect here? a relay? SPDT relay? anyone can guide on this? Meaning if the solar panel is getting voltages above the battery (means it is charging the battery), they load will not work , and when the solar panel is getting voltage lower than the battery, the battery will start to discharge through the load. So what component can switch this circuit? pls email to me, if you have the answer to my doubts, thanks. Hi,

If i am using a 12v 12W solar panel to charge a 12v deep cycle battery, and a 12v load connected parallel to the battery,

My problem is, how to make the load ‘work’ or discharge the battery through the load when the sun is below the battery voltage, what shall i need to connect here? a relay? SPDT relay? anyone can guide on this?

Meaning if the solar panel is getting voltages above the battery (means it is charging the battery), they load will not work , and

when the solar panel is getting voltage lower than the battery, the battery will start to discharge through the load. So what component can switch this circuit?

pls email to me, if you have the answer to my doubts, thanks.

]]> By: David F http://www.solarpowerforhome.userreviews.net.au/best-solar-panels/if-i-connect-solar-panels-a-battery-and-a-load-can-i-figure-out-how-long-it-lasts/comment-page-1/#comment-4251 David F Sun, 28 Feb 2010 11:43:25 +0000 http://www.solarpowerforhome.userreviews.net.au/best-solar-panels/if-i-connect-solar-panels-a-battery-and-a-load-can-i-figure-out-how-long-it-lasts/#comment-4251 Assuming all voltages are the same, you'd be draining the battery at 5 -2 = 3 A. Assuming the battery starts off fully charged, 40 Ah / 3A = 13 hours and 20 minutes, approx. Of course, the discharge curve won't be so discrete, but for a first approximation, this will work. Assuming all voltages are the same, you’d be draining the battery at 5 -2 = 3 A.
Assuming the battery starts off fully charged, 40 Ah / 3A = 13 hours and 20 minutes, approx.
Of course, the discharge curve won’t be so discrete, but for a first approximation, this will work.

]]> By: guru http://www.solarpowerforhome.userreviews.net.au/best-solar-panels/if-i-connect-solar-panels-a-battery-and-a-load-can-i-figure-out-how-long-it-lasts/comment-page-1/#comment-4250 guru Sun, 28 Feb 2010 11:14:35 +0000 http://www.solarpowerforhome.userreviews.net.au/best-solar-panels/if-i-connect-solar-panels-a-battery-and-a-load-can-i-figure-out-how-long-it-lasts/#comment-4250 It depends on the application You will draw 5 Amps for how many hours per day? You will get 2 amps for how many hours per day? For each hour of operation at 5A you will need (5/2) = 2.5 hours of sun. Hope this properly answers your question It depends on the application
You will draw 5 Amps for how many hours per day?
You will get 2 amps for how many hours per day?
For each hour of operation at 5A you will need (5/2) = 2.5 hours of sun.
Hope this properly answers your question

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