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Solar panel kit at Costco $120

$120.00
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https://www.costco.com/Coleman-10...49972.html

Costco has the Coleman 100watt solar panel with charge controller kit on sale for $120 until 9/24/17. These are made by Sunforce.

This is a good choice if you want a 100watt kit for a low price. The controller is not expandable meaning you can't add panels to it. You might need an extension cable as it looks like the one on the controller is kind of short. Tempting considering the Costco product warranty.
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Created 09-15-2017 at 08:12 AM by mgreen2
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24 Comments

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#2
Wondering if this solar panel enough juice to run small heater for greenhouse.
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#3
Quote from phdo
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Wondering if this solar panel enough juice to run small heater for greenhouse.
looks like it will charge a 12v battery, but you would need a converter to go from that 12v dc battery to 120v ac.
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#4
Quote from phdo
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Wondering if this solar panel enough juice to run small heater for greenhouse.
Depends on the size of green house, where you are located and size of battery bank.
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Last edited by 4u2c September 15, 2017 at 08:31 AM.
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#5
Quote from 4u2c
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Depends on the size of green house, where you are located and size of battery bank.....you might be able to run a 75 watt light bulb.
75 watt light bulb is a good idea for my greenhouse 6ft x 8ft. Wonder if it be able run whole night. Thanks
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Last edited by phdo September 15, 2017 at 08:23 AM.
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#6
Quote from 4u2c
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Depends on the size of green house, where you are located and size of battery bank.....you might be able to run a 75 watt light bulb thru the night with a battery.
Quote from phdo
:
75 watt light bulb is a good idea for my greenhouse 6ft x 8ft. Thanks
Don't use a light bulb. If you're looking to heat, don't waste output on generating light. Generate heat.

https://www.amazon.com/Pecute-Hea...eater+bulb

It's a bad idea anyway, though. You're going to be heating it when the sun is out, and then you'll have nothing when it's down (which is when you need it most). Assuming your heater will do a good job at heating, you're going to have massive temperature swings.
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#7
Quote from iamchris
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Don't use a light bulb. If you're looking to heat, don't waste output on generating light. Generate heat.

https://www.amazon.com/Pecute-Hea...eater+bulb [amazon.com]

It's a bad idea anyway, though. You're going to be heating it when the sun is out, and then you'll have nothing when it's down (which is when you need it most). Assuming your heater will do a good job at heating, you're going to have massive temperature swings.
Perfect, it is a solution that i've been looking for. Thanks
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#8
Quote from iamchris
:
Don't use a light bulb. If you're looking to heat, don't waste output on generating light. Generate heat.

https://www.amazon.com/Pecute-Hea...eater+bulb

It's a bad idea anyway, though. You're going to be heating it when the sun is out, and then you'll have nothing when it's down (which is when you need it most). Assuming your heater will do a good job at heating, you're going to have massive temperature swings.
Good advice ... I'll edit my post ...didn't know they made that screw in heater.
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#9
Quote from SevenPoint
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looks like it will charge a 12v battery, but you would need a converter to go from that 12v dc battery to 120v ac.
Do you have that model in your mind? Thanks
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#10
Quote from SevenPoint
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looks like it will charge a 12v battery, but you would need a converter to go from that 12v dc battery to 120v ac.
Another bad idea. You want to go through as few AC->DC (or vice-versa) conversions as possible, as there's a large amount of energy loss. Get something like this instead and keep the entire system 12V: https://www.amazon.com/Maradyne-H...12v+heater

And you'll also need to get enough batteries to make sure your heater lasts through the night, or else you're going to fully drain your batteries, and they'll be dead within a year of repeated draining like this. The only way this is going to be a good idea is if you get lithium batteries that can be fully discharged, and then at that point, you'll be spending quite a fair bit of money to heat your greenhouse. It's just not worth it.
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#11
So, the people talking about setting this up in a remote environment, just add a cheap photosensor to the setup and have the bulb turn on at sundown and turn off at sunup. Granted using a 100w heat lamp bulb will result in probably running that battery dead every night. 100w panel - 8 hours good sun. followed by 12 hours of the heat lamp on. you are losing juice every night.
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#12
Quote from iamchris
:
Don't use a light bulb. If you're looking to heat, don't waste output on generating light. Generate heat.

https://www.amazon.com/Pecute-Hea...eater+bulb [amazon.com]

It's a bad idea anyway, though. You're going to be heating it when the sun is out, and then you'll have nothing when it's down (which is when you need it most). Assuming your heater will do a good job at heating, you're going to have massive temperature swings.
anything that uses power (cpu, lightbulb, heating element, phone charger, regridgerator, etc.) releases that power as heat. a 100W lightbulb and heating element release the same amount of heat BUT the heating element peaks in infrared (which is also photons, just like the lightbulb). the infrared has a much longer wavelength and is absorbed more readily (instead of bouncing around until it is absorbed). If not much of the lightbulb's light goes out the roof (use reflectors, roof isn't completely transparent, what the light strikes isn't reflective) then there would be little difference.

If you wanted to heat a specific area then you are completely correct though. I also agree that this shouldn't be used for heating, it is made for lower loads.
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#13
is this kit good for a PWC/seadoo that only gets used a few times/yr? Won't damage battery or anything?
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#14
Quote from dperque
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is this kit good for a PWC/seadoo that only gets used a few times/yr? Won't damage battery or anything?
Get a trickle charger instead. About 20 bucks. this is more for camping/camper Vans.
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#15
Quote from dperque
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is this kit good for a PWC/seadoo that only gets used a few times/yr? Won't damage battery or anything?
Sure or you could go for a much cheaper price option [harborfreight.com] if you're sure you won't be needing more power for other applications.
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