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Grape Solar 100W Polycrystalline Solar Panel

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Home Depot has Grape Solar 100W Polycrystalline Solar Panel (GS-Star-100W) on sale for $94.99. Shipping is free or you may opt for free in-store pickup where available. Thanks mjboynton

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Edited August 29, 2018 at 09:41 AM by
Grape Solar 12V 100-Watt Polycrystalline Solar Panel $94.99 with Free Shipping

https://www.homedepot.com/p/Grape...211365-_-N
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Created 08-06-2018 at 09:04 AM by mjboynton
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#16
Quote from pet1700
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What can you power with this one panel?
Most people don't use these to power devices directly. They use these to charge batteries, and run the devices off the battery.

You could easily run some lights, charge your phone/bluetooth speakers and run a small power tool from your shed that you're in maybe once a week. You just have to make sure there's enough battery reserve for your needs stored in between uses.
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#17
Quote from riles246
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I like to size my loads to about 6 hours of the rated output of the panel. So for one panel, you can have 600 watt hours per day. For perspective, I have a router that draws 12v2a, or 24 watt hours. That would need 576 watt hours per day, so this panel would be just about perfect.

In summer it's probably more like 8 or 10 hours but I like to size for winter so that I can be sure I'll be powered year round.

You'll also need a fairly sizeable battery; the smallest you could safely get away with is 12v30ah since the battery will power the device overnight and the panel would charge the battery and run the device during the day. You'll also need a charge controller.

This is just one example.
Great explanation.
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#18
I know nothing about solar panels so this question may sound really dumb but I'm ok with that. I have an extra lawn mower tractor battery, can it be connected to this panel and used to power some lights in a shed and recharge?
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#19
Quote from pet1700
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What can you power with this one panel?
In full sunlight, you'll get about 5ah @ 12 volts per panel, so anything less than 5ah that is 12v DC. You're best bet is charging batteries, then using the batteries to run stuff. I have 2 panels and about 200ah of batteries that run all of my lights(led), a 400 watt inverter, fans, and still have enough power to keep my tool batteries and house batteries topped off.
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#20
Quote from Butcher98
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I know nothing about solar panels so this question may sound really dumb but I'm ok with that. I have an extra lawn mower tractor battery, can it be connected to this panel and used to power some lights in a shed and recharge?
Yes...
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#21
Quote from Butcher98
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I know nothing about solar panels so this question may sound really dumb but I'm ok with that. I have an extra lawn mower tractor battery, can it be connected to this panel and used to power some lights in a shed and recharge?
Yes, not as effective as deep cycle batteries. And your battery will deteriorate faster if you discharge it to 0% few times.
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#22
how many of these needed to charge my tesla?
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#23
Quote from GrizzB32
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Now i feel dumb for wondering the same thing...
Don't feel dumb. People generally don't use a single panel to for real-time electric usage. They use it to slowly charge a battery 🔋 that can then be used for longer periods of time.
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#24
Quote from Butcher98
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I know nothing about solar panels so this question may sound really dumb but I'm ok with that. I have an extra lawn mower tractor battery, can it be connected to this panel and used to power some lights in a shed and recharge?
It will work for that. To keep it charging properly, you'll want a charge controller. The cost about $15.
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#25
Quote from Tryinadecide
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It will work for that. To keep it charging properly, you'll want a charge controller. The cost about $15.
Is there one you recommend?
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#26
It can be dumb question but I want to set solar powered light in my backyard. I have try to search a lot in google for finding instruction about item needed and assemble but not able to do so. Could someone help me if they have done similar kind of project for backyard or any place in there house. I am not planning to spend big money and trying to do it by myself. All I understand I need solar power panel, battery to store power , DC to AC converter and light bulb.
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#27
Quote from Butcher98
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Is there one you recommend?
I have a renogy wanderer, but it is likely more than you need. Anything renogy is trustworthy, and if you keep an eye on amazon, I found mine in the warehouse deals for almost half price listed as used-good. It arrived practically new.
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#28
Quote from Tryinadecide
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I have a renogy wanderer, but it is likely more than you need. Anything renogy is trustworthy, and if you keep an eye on amazon, I found mine in the warehouse deals for almost half price listed as used-good. It arrived practically new.
So something like this? Renogy Wanderer - 30A Advanced PWM Negative-Ground Solar Charge Controller https://www.amazon.com/dp/B00BCTL...ABbAA23784
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#29
Quote from ecoli01
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how many of these needed to charge my tesla?
Do the math and you'll realize how inefficient the model S is...

Unless you have a model 3, which is better, but still not as good as it could have been, efficiency-wise

edit: quick back of the envelope math shows you need one panel for every 2 miles per day you drive. (model s). this assumes no loss due to clouds, shade, etc.
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Last edited by grindswiss August 6, 2018 at 11:39 AM.

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#30
Quote from instinet
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Don't feel dumb. People generally don't use a single panel to for real-time electric usage. They use it to slowly charge a battery 🔋 that can then be used for longer periods of time.
One is enough. It will take 3 months tho. 😜
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