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Coleman 7 Amp Solar Charge Controller $9 Walmart

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Coleman 7 Amp Solar Charge Controller
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http://www.walmart.com/ip/Coleman...r/15063161

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#2
Hmm.. I was about to buy 4 for backups but the ones that came with my kits, including harbor freight's, are 30 amp.
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#3
Amazon has it for the same price!

https://www.amazon.com/dp/B004RCP...pcomp_prc1
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#4
Fine is all you have is a single 100w (or 2, 50w) panel tied to a battery. Maybe great for power in a small shed.. but don't plan on adding another panel. Maybe ok for a tow behind 2 person teardrop sleeper too.

Come to think of it, a battery maintainer for off season maintenance of a mower or summer car battery.

~sb
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#5
This is the regular price on Amazon and amazon has free shipping whereas Walmart does not at this pricepoint.

https://www.amazon.com/Sunforce-6...merReviews
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#6
I bought this Schumacher SP-600 6W from an Amazon deal to set up as a trickle charge for my truck. Will this controller work for that?
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#7
Quote from gonzoret
:
I bought this Schumacher SP-600 6W from an Amazon deal to set up as a trickle charge for my truck. Will this controller work for that?
No need for a charge controller at 6w for a vehicle battery
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#8
Quote from person438
:
No need for a charge controller at 6w for a vehicle battery
This is incorrect. A small enough panel may not overcharge a large enough truck battery, **but** the sp-600 panel does not include a blocking diode so it would drain the battery at night if connected directly. Charge controllers prevent drain by the panel, and this is the more important reason for the Schumacher manual specifically calling for a controller for maintenance applications.
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#9
Quote from icanseeyourepidermis
:
This is incorrect. A small enough panel may not overcharge a large enough truck battery, **but** the sp-600 panel does not include a blocking diode so it would drain the battery at night if connected directly. Charge controllers prevent drain by the panel, and this is the more important reason for the Schumacher manual specifically calling for a controller for maintenance applications.
Yeah solar panels have a weird side effect of turning into led's if they've got a power source on one end at night. The current goes the other way and leaches from the battery to the panels in the form of light.
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#10
Quote from Specboy
:
Fine is all you have is a single 100w (or 2, 50w) panel tied to a battery. Maybe great for power in a small shed.. but don't plan on adding another panel. Maybe ok for a tow behind 2 person teardrop sleeper too.

Come to think of it, a battery maintainer for off season maintenance of a mower or summer car battery.

~sb
I'm looking to potentially add some solar panels to my small shed but have very little knowledge on the topic. Any pointers on "beginner kits" and expected good price points or forums where I can learn more to get started?
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#11
Quote from rolyco
:
I'm looking to potentially add some solar panels to my small shed but have very little knowledge on the topic. Any pointers on "beginner kits" and expected good price points or forums where I can learn more to get started?
Renogy makes some nice stuff at reasonable prices. Best thing to do is make a list of everything in your shed you want to power and research the wattage of each device. Then add 20% more wattage on top of that and you'll have a good starting point. Read up on the difference between mppt and pwm charge controllers and understand the benefits of panels wired in series, vs panels wired in parallel.

If you are looking to add ac powered devices, you'll want to look into inverters, but for things like lights or fans, I'd look at 12v dc. LED light strips or "pucks" that will last a long time on a single 12v car-size battery are great and can provide even lighting.

Lastly, oversize your charge controller so you can add more panels if needed. I'm piecing together a system for my travel trailer that will support four panels total. Two that will be mounted on the roof and a third folding one I already have that can be moved into the sun if I'm parked in the shade. the 4th is for expansion... maybe a flexible panel on the curved Fame of the trailer at some point...
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#12
Quote from funkriders
:
This is the regular price on Amazon and amazon has free shipping whereas Walmart does not at this pricepoint.

https://www.amazon.com/Sunforce-6...merReviews
No longer available on Amazon at that price. Showing 30+ $ now
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#13
Quote from NickN7561
:
Yeah solar panels have a weird side effect of turning into led's if they've got a power source on one end at night. The current goes the other way and leaches from the battery to the panels in the form of light.
And LEDs will also work as photodiodes !!
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#14
Quote from rolyco
:
I'm looking to potentially add some solar panels to my small shed but have very little knowledge on the topic. Any pointers on "beginner kits" and expected good price points or forums where I can learn more to get started?
Been watching diy solar videos on YouTube by Will Prowse and he recently started a new forum for diy solar. https://diysolarforum.com/
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