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expiredtimsy posted Nov 30, 2021 02:42 AM
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expiredtimsy posted Nov 30, 2021 02:42 AM

100-Watt 12-Volt Flexible Monocrystalline Solar Panel

& More + Free Shipping

$92

$130

29% off
123 Comments 76,715 Views
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HQSolarPower.com has Lithium Iron Phosphate Batteries, Solar Panels & More on sale below.

Thanks community member timsy for sharing this deal

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Editor's Notes

Written by slickdewmaster | Staff
  • HQST Return Policy:
    • If you decide to return your purchase, HQST Solar will allow for a refund for new, undamaged, and unmodified products within 30 days of receiving the order. Returns submitted for a refund may be subject to a 10% restocking fee and shipping costs.
    • HQST Solar will waive the 10% restocking fee and pay for shipping in the following situations: carrier damage, a defective product, a product does not match advertising, receiving an incorrect product, or a product was an extra item that was not ordered. For any other reasons, customers are responsible for shipping fees.
No Longer Available:

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Written by timsy
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Deal Details
Community Notes
About the Poster
HQSolarPower.com has Lithium Iron Phosphate Batteries, Solar Panels & More on sale below.

Thanks community member timsy for sharing this deal

Example Deals:

Editor's Notes

Written by slickdewmaster | Staff
  • HQST Return Policy:
    • If you decide to return your purchase, HQST Solar will allow for a refund for new, undamaged, and unmodified products within 30 days of receiving the order. Returns submitted for a refund may be subject to a 10% restocking fee and shipping costs.
    • HQST Solar will waive the 10% restocking fee and pay for shipping in the following situations: carrier damage, a defective product, a product does not match advertising, receiving an incorrect product, or a product was an extra item that was not ordered. For any other reasons, customers are responsible for shipping fees.
No Longer Available:

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Written by timsy

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Top Comments

eiei
471 Posts
66 Reputation
The lithium technology is now becoming easily accessible to general population. 3000 charge cycle expectancy is difficult believe, offering 10 times longer lasting usability than lead acid or AGM types, or up to 5-6 times more than first generation lithium ion batteries.

This equates to minimum 10+ years life expectancy, yet priced at par with high quality commercial lead-acid batteries.

This is fabulous and unrealistic deal, but I don't believe seller's claim. If they truly believe their hardware to last minimum charge cycle of 3000, they'd be accompanied with stated warranty accordingly, that is minimum 10 years free of replacement guarantee, that is to say, free battery replacement rights to purchasers if storage capacity degraded to industry standard of 60-70% of original specification.

This really may be a quantum leap jump in battery technology everyone wants, or just a hype to find a sucker. I'd tend to believe it be be later case, as I can't find warranty replacement policy that support its claims.

There still is many merchants selling over-stated lithium batteries in eBay. I do not believe they wanted quick income by cheating someone, but they really do NOT understand the underlying battery technology. I hope merchants in this understand the items they sell to public.
boxedlunch
40 Posts
10 Reputation
You must not be familiar with LiFePO4 chemistry.
ikonoklast
9531 Posts
1060 Reputation
LiFePO4 chemistry batteries have high cycle counts in the thousands. 3000 is a reasonable expectation for these batteries. Whether the manufacturer puts in quality cells is something buyer has to research.

123 Comments

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Original Poster
Dec 02, 2021 03:13 AM
1,846 Posts
Joined Feb 2006
timsy
Original Poster
Dec 02, 2021 03:13 AM
1,846 Posts
Quote from 49studebaker :
How does the flexible solar panel compare to the renogy flexible solar panel? Renogy rigid was $65. On Amazon, flexible is $132.
Some report the HQST is a relabeled Renogy. One review reported the HQST was a sticker and the cables had "Renogy" molded in. YMMV, but HQST has a decent rep.

At least for the rigid panels, they sure do look the same.
https://www.youtube.com/watch?v=A...8VAk&t=49s
Dec 02, 2021 04:28 AM
690 Posts
Joined Jul 2013
Hun-chanDec 02, 2021 04:28 AM
690 Posts
Quote from SiennaLaborer365 :
Is there a youtube video or website you recommend for learning how to build the battery?
Yeah, this video [youtube.com] explains the process.​
Dec 02, 2021 05:39 AM
501 Posts
Joined Aug 2003
49studebakerDec 02, 2021 05:39 AM
501 Posts
Quote from timsy :
Some report the HQST is a relabeled Renogy. One review reported the HQST was a sticker and the cables had "Renogy" molded in. YMMV, but HQST has a decent rep.

At least for the rigid panels, they sure do look the same.
https://www.youtube.com/watch?v=A...8VAk&t=49s
Is there glue on the back side of the flexible solar panel? If mounted to a van roof, maybe it would be smart to put some flat square strips under the panel, every two inches or so that air could circulate?

If mounted directly to a fiberglass camper roof, would the solar panel get too hot without air circulation under the solar panel?
Last edited by 49studebaker December 1, 2021 at 09:47 PM.
Dec 02, 2021 04:19 PM
1,838 Posts
Joined Aug 2011
NateRulesDec 02, 2021 04:19 PM
1,838 Posts
Quote from Hun-chan :
The battery comes to $3.65/Ah. If you are willing to wait for a slow boat from China and assemble the battery/BMS yourself you can get as low as $2ish/Ah.

I used these to build a 280Ah system.

4pcs/lot VariCore 3.2V 280AH battery pack [aliexpress.com]
BMS Li-ion LiFePO4 [aliexpress.com]
I did this as well. But it's not just a money saver, it was super interesting and I actually enjoyed building it. (not the waiting 3 months for delivery though) Everyone should probably go watch some Will Prowse videos and see if it's something they would like to do. I'm glad I did because now I know a lot about electricity. I did have to buy a good amount of new tools though so was a little more expensive than I let on.
Dec 02, 2021 04:50 PM
123 Posts
Joined Feb 2010
RCFlyerDec 02, 2021 04:50 PM
123 Posts
Quote from deallme :
Can you provide more info on the battery you built? I have been watching Prowse for a while and am considering the same....
The links provided in this reply: https://slickdeals.net/f/15464725-100-watt-12-volt-flexible-monocrystalline-solar-panel-92-50-more-free-shipping?p=151715158#post151715158
would be a good place to start looking, assuming you have the time to wait.
How I bought my cells is not a good place to go anymore, so won't even say what it was. The BMS was from Overkill Solar. If I had to do something again (right now) I'd probably go with another Overkill BMS and these people for cells: https://diysolarforum.com/threads...-21.28696/
Also lots of good info here in the replies since I posted.
Dec 02, 2021 05:07 PM
123 Posts
Joined Feb 2010
RCFlyerDec 02, 2021 05:07 PM
123 Posts
Quote from SiennaLaborer365 :
Is there a youtube video or website you recommend for learning how to build the battery?
As many in this thread have mentioned, Will Prowse on Youtube is well respected in this topic. Look him up and find one of his many where he either breaks one down or builds it from scratch. Then go to DIYSolarforum.com where he has all sorts of great info about tools, suppliers, etc, and lots of other enthusiasts to ask your questions of.
Dec 02, 2021 11:23 PM
469 Posts
Joined Sep 2010
charwarDec 02, 2021 11:23 PM
469 Posts
Quote from ikonoklast :
LiFePO4 chemistry batteries have high cycle counts in the thousands. 3000 is a reasonable expectation for these batteries. Whether the manufacturer puts in quality cells is something buyer has to research.
Until it hails or a rock flies up. Idk, may be that way if it is protected from the elements. That being said, they have it placed on an RV where any hail or rocks would hit. And, at 70mph, I can't imagine it doesn't explode. Cool stuff though.

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Dec 03, 2021 12:57 AM
91 Posts
Joined Mar 2014
vtxbruceDec 03, 2021 12:57 AM
91 Posts
Quote from eiei :
It's is actually half the price one Costco merchandise at this moment, which I though is extremely attractive, still pondering if I should replace my golf cart batteries. My deep-cycle battery rarely last more than a year, and as with all lead acid type, self discharge rate is becoming intolerable, that is, it loses 25-40% SOC overnight. Basically, waste too much time just to charge battery.
My golf cart batteries, yielding approximate twice the capacity of this one costs about $300, at par with Costco package, will jump onto this lithium, if there is any assurance that these batteries perform as stated. Even at $1400 Costco charge for pair, I'd more than happy to buy it, it's well worth the investment.
From what I read on media, these things can be charged with much higher current and negligible self-discharge loss, substantially reducing overall recharging time, which is real benefit of having lithium battery.

Only issue is, as you stated, the quality of cells inside that can yield theoritical yield of stated charge cycle. You may end up with one of those 18650 recycled cell repackaged that stated energy capacity is unreal.
The Costco Lion Energy Lifepo4 105AH battery has a lifetime replacement warranty that actually equates to 10 years, according to the manufacturer. I installed one in March/2020 and it has worked better than expected. Most of the cheaper Lifepo4 batteries do not have a low temp cutoff sensor, but there are things to avoid damage: install them inside, use a solar controller that has a low temp cutoff sensor, use a 12 volt heat blanket for <32 degree situations.
Dec 03, 2021 03:19 AM
10 Posts
Joined Nov 2011
rcnjstudentDec 03, 2021 03:19 AM
10 Posts
Dumb question - if I bought two of these 100AH batteries, would I be able to wire them up together to safely get 200AH combined? I've been thinking about building a mini backup system to power the fridge, charge laptop/phone/modem/router/etc in the event of an extended power outage situation. I figure a 2000W max output is ideal so I don't have to worry about going over capacity if I tried running multiple things at once. I think 200AH should be able to give over 2000W of energy at most, and if using much less than that, should be able to last 2-3 days between needing charges with the solar panel.
Dec 03, 2021 02:33 PM
1,349 Posts
Joined Apr 2015
goyangyi1Dec 03, 2021 02:33 PM
1,349 Posts
Hail uh oh, no more 0 emission
Original Poster
Dec 05, 2021 02:13 AM
1,846 Posts
Joined Feb 2006
timsy
Original Poster
Dec 05, 2021 02:13 AM
1,846 Posts
Quote from 49studebaker :
Is there glue on the back side of the flexible solar panel? If mounted to a van roof, maybe it would be smart to put some flat square strips under the panel, every two inches or so that air could circulate?

If mounted directly to a fiberglass camper roof, would the solar panel get too hot without air circulation under the solar panel?
You can glue it yourself but use something easily removable later like adhesive silicone. Do not use something like 3m 5200 that is intended for permanent install. It is prudent to seal the edge so wind does not get under it and tear it off; a 75MPH wind can wreak havoc if even a small edge lifts up on the front.

Flat against the roof will be less efficient but I do it anyway to reduce the wind resistance. Hard to guess how much less power there is but it seems to work well.
Dec 05, 2021 08:48 AM
743 Posts
Joined May 2016
Jeepermany2kDec 05, 2021 08:48 AM
743 Posts
To give you an idea of how long lifepo4 batteries last, I have Dewalt 28v batteries that I still use with a circular saw. Sure the capacity is a lot lower now, but they have enough power to be useful.

Dewalt canceled their 28v line way back around 2010. My batteries are dated 2007!
Dec 05, 2021 09:21 AM
743 Posts
Joined May 2016
Jeepermany2kDec 05, 2021 09:21 AM
743 Posts
Quote from rcnjstudent :
Dumb question - if I bought two of these 100AH batteries, would I be able to wire them up together to safely get 200AH combined? I've been thinking about building a mini backup system to power the fridge, charge laptop/phone/modem/router/etc in the event of an extended power outage situation. I figure a 2000W max output is ideal so I don't have to worry about going over capacity if I tried running multiple things at once. I think 200AH should be able to give over 2000W of energy at most, and if using much less than that, should be able to last 2-3 days between needing charges with the solar panel.
Yes, you can wire your two 100AH batteries in parallel for a total of 200AH, but keep in mind you realistically won't have 200AH usable. As a rule of thumb, depth of discharge for lead acid batteries is 50%, while lifepo4 is 70%. Sure you could drain them further, but that will shorten their lifespan.

No, 200AH of 12v batteries isnt going to run a full size fridge for the duration you mentioned . It'll probably need 2Kw per day, so when you factor in DoD, you'd be lucky to get a day out of 200AH. A 100w solar panel is only going to recharge about 25AH a day
Original Poster
Dec 05, 2021 07:43 PM
1,846 Posts
Joined Feb 2006
timsy
Original Poster
Dec 05, 2021 07:43 PM
1,846 Posts
Quote from SiennaLaborer365 :
Is there a youtube video or website you recommend for learning how to build the battery?
https://diysolarforum.com/forums/...-banks.22/

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Dec 05, 2021 07:51 PM
3,241 Posts
Joined Jun 2004
ieee488Dec 05, 2021 07:51 PM
3,241 Posts
Quote from annihil8ted :
As a solar noob, is the flexible solar panel something I can connect directly to one of those portable batteries like the Jackery Explorer or Golabs? Or do I need one of the MPPT to do so safely?
The Jackery and the GoLabs are not just batteries. They already have MPPT controller built-in.

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