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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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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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Dec 01, 2021 02:52 AM
288 Posts
Joined Dec 2013
WolvMarineDec 01, 2021 02:52 AM
288 Posts
Quote from funkmasterscizz :
I'd love to put a solar panel on the roof of my golf cart…
Should prolly be more worried about your back swing
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.
Open her up and send us pics then
1
Dec 01, 2021 03:03 AM
199 Posts
Joined Jan 2006
SymberDec 01, 2021 03:03 AM
199 Posts
Quote from VegasGuy89183 :
The life cycle of a LiFePO battery is dependent upon several factors. The two main ones being maximum charge percentage and maximum discharge percentage. As I recall, I recently watched a Will Prowse video where he had set the maximum charge percentage to 80% and the maximum discharge to 30%. Or, maybe he just hypothetically discussed these settings rather than actually using them. Without re-watching all of his videos from the last two months, I'm going with my memory. As I recall, he claimed something like 10,000 recharge cycles using these 80% / 30% settings.

The reason these numbers stuck with me is that years ago I saw similar videos suggesting these were the charge / recharge numbers you should use for your phone to get the maximum battery life.

Regardless, if I still had my motorhome, I'd be upgrading the house lead acid batteries with LiFePO batteries in a heartbeat. But I would not put one in my RV or car as a starting battery, as the technology currently exists.
I vaguely recall Will saying something to this effect as well. IIRC (and that's a big assumption lol) it was for a particular battery he was tearing down at the time. Maybe the EG4?

I will say, however, that lifepo4 shouldn't have this drawback that other lithium ion chemistry has in the past (like cell phones). The lifepo4 chemistry is capable of complete discharge without harm to the battery. I think it's likewise also unharmed by fully charging.
Dec 01, 2021 03:54 AM
690 Posts
Joined Jul 2013
Hun-chanDec 01, 2021 03:54 AM
690 Posts
Quote from Miamipanther :
This is very tempting price, how was the battery? grade A or grade B, did you do battery capacity test.

We are also looking to DIY battery bank for our RV
I'm not sure what grade they are, but they looked perfect, and they were well packed. I have never tested the capacity. I suppose I should. I'll have to look into it.
I learned about how them through this youtube video [youtube.com].
Dec 01, 2021 04:13 AM
171 Posts
Joined Jan 2017
DonBahamaDec 01, 2021 04:13 AM
171 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.
I bought 6 Trojans for my club car for about $800 shipped and it solved all my problems. If you are replacing batteries one at a time you are asking for trouble. .
Dec 01, 2021 04:18 AM
1,054 Posts
Joined Oct 2010
noobie107Dec 01, 2021 04:18 AM
1,054 Posts
Quote from superdeal7 :
Anyone know if this could be used with car audio applications? I've seen several cars at bass competitions running several 12v batteries and from what I hear they are over 500.00 each easily.
not this battery specifically, but yes you can use LFP in a car for audio if you set it up correctly. don't mix lead with lithium, or have the lithium battery on an isolator. make sure the BMS has a high voltage cutoff since car alternators can go up to 15 volts.
Pro
Dec 01, 2021 05:04 AM
417 Posts
Joined Feb 2016
Edbmsm
Pro
Dec 01, 2021 05:04 AM
417 Posts
Quote from noobie107 :
not this battery specifically, but yes you can use LFP in a car for audio if you set it up correctly. don't mix lead with lithium, or have the lithium battery on an isolator. make sure the BMS has a high voltage cutoff since car alternators can go up to 15 volts.
Since superdeal7 mentioned "bass competition", this battery isn't a good enough true voltage source. Car audio batteries are less about capacity, more about the ability to dump peak currents (so requiring a very low internal resistance).

Competition Class D (bass) amps basically act as a fast crowbar switch, sending its >60 volt output across the woofer's 1-ohm coil in short pulses (PWM wave-shaped). If the many 0-guage cables - and both dedicated 350A alternators- allow, these types of batteries can maintain 1200A for 10s, peak charge at 500A (it's only 40-Ahr capacity), and a BMS that has to balance the cells in real-time.

For us mere mortals, a mainstream discrete car audio system could use a localized battery with a decent ESR (Equivalent Series Resistance), else fat capacitors (1 Farad per audio watt), but all is lost without proper wiring/grounding, connector resistance, and giving up disco music.
Last edited by Edbmsm November 30, 2021 at 09:43 PM.
Dec 01, 2021 05:21 AM
920 Posts
Joined Nov 2015
sadfaceDec 01, 2021 05:21 AM
920 Posts
Quote from ikonoklast :
LiFepo4 battery in general should not be used in freezing conditions. The battery management system should have low temp cutoff to prevent damage. This is not a replacement for lead-acid battery for engine cranking. This is good for providing power for other applications like powering your RV/house where it's in above freezing temps.
They shouldn't be charged in freezing temps the use is fine.

Charge:32~113℉ / 0～45℃

Discharge:-4~140℉ / -20～60℃
Last edited by sadface November 30, 2021 at 09:46 PM.

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Dec 01, 2021 05:40 AM
34 Posts
Joined Jun 2017
aerotecDec 01, 2021 05:40 AM
34 Posts
Quote from ikonoklast :
Battery review.

https://youtu.be/IkoYW7kCR4I
Admittedly I didn't watch the video because when I see someone with 500k subscribers only getting 5k views on each video it's a huge red flag. It's crazy to see only 1% of his viewers actually interested in his content.
1
Original Poster
Dec 01, 2021 05:47 AM
1,846 Posts
Joined Feb 2006
timsy
Original Poster
Dec 01, 2021 05:47 AM
1,846 Posts
Quote from Troublestylist :
Why would the BMS know or care? All it sees is incoming voltage. Connect these in series and you would likely have one of the BMS shut down first, reducing total capacity. But I can't see why it wouldn't "work".
The BMS needs to tolerate the higher voltage. Specifically, the FETS controlling the balancing and shutting off the charging when done need to be rated for 48+V. If you watch the Will Prouse videos, there are other choices at similar prices. Buy one of those. I like these ones since they are a brand most will be familiar; several reviews say they are relabeled Renogy, another good brand.

The biggest challenge in LiFePo4 is not getting swollen Chinese street light castoffs sold as "Grade A, New" that cost hundreds to return to a China based seller. You can source the best from China but can also accidentally get the worst. These seem a safe bet.

Good Luck!
Last edited by timsy November 30, 2021 at 09:49 PM.
Dec 01, 2021 06:20 AM
6,752 Posts
Joined Dec 2004
TroublestylistDec 01, 2021 06:20 AM
6,752 Posts
Quote from timsy :
The BMS needs to tolerate the higher voltage. Specifically, the FETS controlling the balancing and shutting off the charging when done need to be rated for 48+V. If you watch the Will Prouse videos, there are other choices at similar prices. Buy one of those. I like these ones since they are a brand most will be familiar; several reviews say they are relabeled Renogy, another good brand.

The biggest challenge in LiFePo4 is not getting swollen Chinese street light castoffs sold as "Grade A, New" that cost hundreds to return to a China based seller. You can source the best from China but can also accidentally get the worst. These seem a safe bet.

Good Luck!
Good point. I can see why they could get hit with the higher voltage. Thanks!
Dec 01, 2021 11:44 AM
6 Posts
Joined Nov 2021
YirmeyahuDec 01, 2021 11:44 AM
6 Posts
Quote from Symber :
While this is a nice high level breakdown and helpful for most. I would like to clear up one misconception here. Cycle life (3,000 in this case) is NOT the lifetime of the battery. It is how long it will take the battery to wear out to 80% capacity. The battery is still perfectly usable at this point, it would have just degraded 20%.
Almost, this is true if the battery is kept around 25 degrees Celsius and the discharge rate is usually 0.2C (for this system that's around 250 watts). Most people will probably see more ike 60% capacity. Your point is true though, LFP lasts soooooo much longer than Lead acid.
Dec 01, 2021 12:00 PM
2,373 Posts
Joined Oct 2013
selvaspkDec 01, 2021 12:00 PM
2,373 Posts
do anyone use it for regular house? Or is it meant for boats, RVs?
Dec 01, 2021 12:11 PM
10 Posts
Joined Nov 2021
FairPassenger2990Dec 01, 2021 12:11 PM
10 Posts
Seems like a great deal! Thanks OP!
Dec 01, 2021 12:12 PM
501 Posts
Joined Aug 2003
49studebakerDec 01, 2021 12:12 PM
501 Posts
How does the flexible solar panel compare to the renogy flexible solar panel? Renogy rigid was $65. On Amazon, flexible is $132.

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Dec 01, 2021 12:53 PM
2,431 Posts
Joined Jan 2007
kingfisher1111Dec 01, 2021 12:53 PM
2,431 Posts
delete

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