Solar, Flexible Panels - Page 2 - Fiberglass RV


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Old 06-08-2011, 05:36 PM   #15
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Does anyone have a link to a site with a formula or program to calculate how long a given wattage of panels will need to charge a given amp/hour battery?
TIA for any info!
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Old 06-08-2011, 06:10 PM   #16
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Originally Posted by LanceRinFla View Post
Does anyone have a link to a site with a formula or program to calculate how long a given wattage of panels will need to charge a given amp/hour battery?
TIA for any info!
Simple basic equations are:
1. Current I[A] = Panel Watts P[W] / Charging Voltage V 13.6[V] assuming using MPPT controller
2. Time to charge T[Hour] = Battery Capacity [AmpHour] / I[A]

For example:

100[W] panel; 80 [AmpHour] battery
1. I[A] = 100[W] / 13.6[V] = 7.35[A]
2. Time to charge = 80 [AmpHr] / 7.35 [A] = 10.88 hours.

These calculations are only approximate assuming perfect exposure, MPPT controller, no losses. Batteries should never be completely discharged so from a 50% charged battery it would take one half of 10.88 hours.


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Old 06-08-2011, 06:24 PM   #17
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Has any one installed a flexible solar panel on their egg?

Norm
What's wrong with installing them on your pickup shell?
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Old 06-08-2011, 06:26 PM   #18
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Has any one installed a flexible solar panel on their egg?

Norm
What's wrong with installing them on your pickup shell? Marg
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Old 06-08-2011, 06:28 PM   #19
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What's wrong with linstaling them on the top of your pickup shell?
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Old 06-08-2011, 06:36 PM   #20
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What's wrong with linstaling them on the top of your pickup shell?
The first reason is that we don't have a pickup; we tow with a Honda CRV. We also want to have the solar cell with the rig. We're virtually fulltimers and often spend little time at the camp site, exploring the area we're traveling thru.

Thanks for the thought.

Norm
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Old 06-08-2011, 06:38 PM   #21
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I think Jen B. had a thread awhile back and she had done research on flexible solar install on her Burro, so Jen, if you are here please chime in, or Norm, send her a p/m. I tried a search but did not find it.
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Old 06-08-2011, 06:44 PM   #22
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I think Donna linked my previous thread earlier in this one?

I haven't looked any further for solar stuff. It seemed to me from the discussion on the flex-mats I'd started that they aren't a great answer for the Burro.

So, I'm still working on getting a read on my camping habits to come up with an idea of how much solar power I'd want out of the mono or poly panels.
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