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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
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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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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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Nov 30, 2021 05:25 PM
272 Posts
Joined Nov 2015
roy.niswangerNov 30, 2021 05:25 PM
272 Posts
I'd buy if this was amazon.com, test it and either keep or return it. So since it's not I'll pass unless someone has done Max C and capacity tests and even better, like Will Prowse does, tear one down to determine the cell make/model. Stellar price if it's a good build from the cells, bms, wiring, buss bars, and case perspective.
2
Nov 30, 2021 05:26 PM
154 Posts
Joined Mar 2016
COMMANDAAAHNov 30, 2021 05:26 PM
154 Posts
Quote from ikonoklast :
Battery review.

https://youtu.be/IkoYW7kCR4I
Main takeaway:capacity is accurate, but the battery can only be connected in parallel, not in series. If you're attaching an inverter anyway, that's not too important, but if you're using it with DC equipment, your output will be limited to 1200 W.
Last edited by COMMANDAAAH November 30, 2021 at 09:29 AM.
1
Nov 30, 2021 05:26 PM
6,709 Posts
Joined Jul 2007
skwishbotNov 30, 2021 05:26 PM
6,709 Posts
Quote from funkmasterscizz :
I'd love to put a solar panel on the roof of my golf cart…
You have my permission.
Nov 30, 2021 05:32 PM
703 Posts
Joined Jun 2009
MSG123Nov 30, 2021 05:32 PM
703 Posts

Our community has rated this post as helpful. If you agree, why not thank MSG123

These batteries keep getting cheaper every year. 100Ah * 12V = 1.2 kWh. For $365, it's not the best but not the worst either. As an aside, if you're planning on building out a home power plant, make sure you go to at least 48V. So, you'll need 4 of these batteries in a series.

Also, to figure out whether you'll save money by going off grid using a battery solution, take the kWh figure, times it by 0.80 to figure in inverter losses and system losses, multiply it by your AVERAGE cost per kWh from your utility bill, and then multiply it by the amount of estimated cycles from the battery (big assumption here). The AVERAGE cost per kWh should be calculated by taking your monthly bill and dividing it by the total kWh used as determined by the electricity meter reading on the bill. You should do it for a year of readings. So, for me, this is the ROI of the battery:

1.2 kWh * 0.8 * $0.25 / kWh * 3000 = $720. Subtract out the cost of the battery incl taxes, etc..., and the net ROI is more like $320. After you include the costs of the MPPT controller, inverter, and solar panels, the difference gets closer to zero. That explains why NEM is really needed to make solar a cost efficient proposition even in high cost electricity states like CA. Once they phase out NEM 1.0 / 2.0 and implement NEM 3.0, it's likely game over for solar. The ROI will make less and less sense.
Last edited by MSG123 November 30, 2021 at 09:41 AM.
1
1
Nov 30, 2021 05:47 PM
669 Posts
Joined Dec 2012
litesdsdNov 30, 2021 05:47 PM
669 Posts
Would this be a good battery to power a 12V trolling motor for a boat?
2
Nov 30, 2021 05:47 PM
93 Posts
Joined Mar 2017
RiotMan36Nov 30, 2021 05:47 PM
93 Posts
Can't speak for the batteries, though it's not that amazing of a price, since it doesn't have low temp disconnect. Better price point with higher connective options (parallel & series) fall to batteries like the chins, ampier time, and zooms. Which according to Will Prowse are basically all the same battery with different labels on them. They still are bare bones and have no low temp disconnect. These may be higher quality though, so do your research.

For those unaware of this battery type, you can use 100% of the stated amp hours, unlike lead acid agm, etc you can use about 50%. But if you charge them when they are below freezing, you can damage them and they will not work, so you must be careful when charging them in cold conditions.

If you are willing to make your own batteries, you can get even better prices, about 8 months ago you could make a 600ah pack for about $1200, but you had to wait like 3 months for shipping. Prices have jumped significantly since then.

I do however have experience with the hqst 100w compact solar panels. They have held up great over 1 year of van life. Purchased 2 more that should be arriving today, to bring my rv solar total to 500w (70% actual collection is a good estimate).
Nov 30, 2021 05:58 PM
38 Posts
Joined Feb 2009
norpinistNov 30, 2021 05:58 PM
38 Posts
Just purchased the 100w compact solar panels and a 20 Amp MPPT controller for $127 shipped. That deal compares very well to the previously posted Renolgy 100w package deals, in part because you get a MPPT vs. PWM solar controller. Thanks OP!
1

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Nov 30, 2021 06:00 PM
1,330 Posts
Joined Dec 2010
godlyatheistNov 30, 2021 06:00 PM
1,330 Posts
Quote from eiei :
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.
I used to sell LiFePO4 battery to hobbyists years ago. We guaranteed 80% capacity after 2000 cycles, so the battery itself is still very much usable after that. We didn't offer a 10 years warranty, just a prorated warranty based on age. It was not possible offer replacement warranty at the time, since costs were significantly higher.

Every battery chemistry has its own trade off. LiFePO4 has lower energy density than other lithium chemistry, but you get higher duty cycle, safer battery, and more usable energy as a result.

Most of our batteries were sold to ham radio people looking to operate for days without having lead acid battery drag them down.
Nov 30, 2021 06:07 PM
356 Posts
Joined Jan 2009
hoozswupNov 30, 2021 06:07 PM
356 Posts
I want to say kudos to Slickdeals because I feel like it is finally back to its glory day of good and interesting product recommendations like this one. Lately, their algorithm has generated items that simply repeats itself with different brands probably because they can get more money out of it. But from my perspective, none of the products spark any interest to get them. They need to get back on track to recommend interesting products like this one.
Nov 30, 2021 06:09 PM
690 Posts
Joined Jul 2013
Hun-chanNov 30, 2021 06:09 PM
690 Posts

Our community has rated this post as helpful. If you agree, why not thank 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]
1
Nov 30, 2021 06:12 PM
4,060 Posts
Joined Nov 2011
djdocNov 30, 2021 06:12 PM
4,060 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]
replying to mark your message for future when I plan to build my own
2
Nov 30, 2021 06:17 PM
216 Posts
Joined Nov 2014
justlooking818Nov 30, 2021 06:17 PM
216 Posts
Quote from litesdsd :
Would this be a good battery to power a 12V trolling motor for a boat?
depends on the trolling motor, but for the most part yes. you just have to account for the amount of current the motor draws to figure out how much time you have before you lose trolling motor power. i say if anything, it would give you about 3-4 hours of trolling use before i would worry about it not working anymore. more than plenty for most, unless you use the trolling motor to get to your destination. then we will have to pray for the best. =)
Nov 30, 2021 06:19 PM
10,313 Posts
Joined Jul 2007
jplee3Nov 30, 2021 06:19 PM
10,313 Posts
Quote from litesdsd :
Would this be a good battery to power a 12V trolling motor for a boat?
I'm thinking it would be fine. I have a battery box I built out not long ago with a 12v100ah lifepo4 battery (paid a lot more haha) for this purpose. I tried looking for Youtube vids of this specific battery in use for trolling motors but couldn't find any. I don't see why it wouldn't work though. Tempted to pick on up hahaha
Nov 30, 2021 06:34 PM
1,034 Posts
Joined Dec 2011
dartmouth01Nov 30, 2021 06:34 PM
1,034 Posts
Quote from justlooking818 :
depends on the trolling motor, but for the most part yes. you just have to account for the amount of current the motor draws to figure out how much time you have before you lose trolling motor power. i say if anything, it would give you about 3-4 hours of trolling use before i would worry about it not working anymore. more than plenty for most, unless you use the trolling motor to get to your destination. then we will have to pray for the best. =)
Need to know the average amp draw from the trolling motor, but based on a goof search 20 amps at medium seems average. For a 100 amp Jr battery you could get about 5 hrs run time at that rate. Other concern would be max amp draw, but the video review posted took the amp draw up to 200Amps and it still ran for 40 mins or so before shutting down due to overheating. Doubt a trolling motor can pull 200 amps so I think you are ok

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Nov 30, 2021 06:37 PM
514 Posts
Joined Jan 2008
GadgetAddictedNov 30, 2021 06:37 PM
514 Posts
Quote from MSG123 :
These batteries keep getting cheaper every year. 100Ah * 12V = 1.2 kWh. For $365, it's not the best but not the worst either. As an aside, if you're planning on building out a home power plant, make sure you go to at least 48V. So, you'll need 4 of these batteries in a series.

Also, to figure out whether you'll save money by going off grid using a battery solution, take the kWh figure, times it by 0.80 to figure in inverter losses and system losses, multiply it by your AVERAGE cost per kWh from your utility bill, and then multiply it by the amount of estimated cycles from the battery (big assumption here). The AVERAGE cost per kWh should be calculated by taking your monthly bill and dividing it by the total kWh used as determined by the electricity meter reading on the bill. You should do it for a year of readings. So, for me, this is the ROI of the battery:

1.2 kWh * 0.8 * $0.25 / kWh * 3000 = $720. Subtract out the cost of the battery incl taxes, etc..., and the net ROI is more like $320. After you include the costs of the MPPT controller, inverter, and solar panels, the difference gets closer to zero. That explains why NEM is really needed to make solar a cost efficient proposition even in high cost electricity states like CA. Once they phase out NEM 1.0 / 2.0 and implement NEM 3.0, it's likely game over for solar. The ROI will make less and less sense.
The manufacturer explicitly says not to wire these in series....twice...on the product page. Why? I don't know.

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