t11
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| posted on 20/11/16 at 07:53 AM |
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solar panal battery charging
Good morning all....does anyone use a solar panel to charge a car battery ? I have a 20w panel with a cmp decoder (regulator) wiring up is easy but
there are 2 connections for a load (picture shows a bulb) I would guess 12v but what wattage, anote with the controller says make sure the rated
voltage of the panel battery and load are the same......thanks
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steve m
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| posted on 20/11/16 at 09:05 AM |
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I use a small solar panel to trickle charge my 7, the panel is on the garage roof, and the cable runs down into the garage
My reasoning is that's its convenient, and can be left on without any risk of fire, and its free
I also use one in our caravan, same deal
steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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britishtrident
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| posted on 20/11/16 at 09:31 AM |
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A old style 12v lead-acid battery when fully charge has a no-load voltage accross the terminnals of 12.6-12.7 volts this voltage varies a bit with
temperature (low temperature gives lower voltage) and battery chemistry.
To actually float charge a battery the charger needs to output about 0.7 volts above the battery voltage.
https://en.wikipedia.org/wiki/Float_voltage
[Edited on 20/11/16 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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hkp57
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| posted on 20/11/16 at 04:15 PM |
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I use the a car battery to power the door opener on my chicken coup.
The solar panel is wired to the charge regulator, the regulator to the battery then the door controller to the load terminals on the regulator.
If you are just trickle charging a car battery over the winter you don't need anything on the load terminals.
Fleet
SKC Raptor R - Hayabusa
Toyota C-HR Hybrid Limited Edition
Honda VFR1200 CrossTourer
DCT
Marlin Roadster 1800
Mercedes Vito 116 Sport
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sprintB+
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| posted on 20/11/16 at 08:19 PM |
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I have 2 on my motor home, one that keeps the leisure battery going and a small one for the engine start battery. Touching wood, they have been
trouble free for the past several years. I'm about to undertake a winter trip and will be interested to see the charge rate in winter sun.
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t11
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| posted on 20/11/16 at 08:19 PM |
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re solar panel
Thanks all for your help.......
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