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Old 08-19-2019, 02:17 PM   #1
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Renorgy 100 AH Lithium Battery $791

Hi Team,

Renorgy is selling their 100AH Lithium Batteries on ebay for $791

https://www.ebay.com/itm/Renogy-12-V...YAAOSwQXZZ1qyP
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Old 08-21-2019, 07:01 AM   #2
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Whatís the opinion on these??
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Old 08-21-2019, 07:18 AM   #3
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The ad says the batteries come in a 0-volt state. Is that normal?

Says to use lithium charger to awaken them.

Here is an article:

https://batteryuniversity.com/learn/...oltage_cut_off
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Old 08-21-2019, 09:06 PM   #4
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This one looks awesome too and only $400... and includes a Charger! What could go wrong?

https://www.ebay.com/itm/12V100Ah-Li...75.c100623.m-1
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Old 08-22-2019, 09:35 AM   #5
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Where are all the electronics gurus?? I need your unbiased expert opinion on Renogy Lithium. Iíve seen really good reviews and could save several hundred with this sale. Wax on!
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Old 08-22-2019, 03:59 PM   #6
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You get what you pay for. There is a lot that goes into manufacturing a high quality lithium cell. Every wonder why some constant discharge current ratings are lower than others? There is a reason...

They will probably be fine for RV use with limited high draw applications.

I choose Victron - paid a little more but they have very high standards, tens of thousands of deployments, and extremely strong performance backed by heavy internal r&d investments.
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Old 08-22-2019, 04:14 PM   #7
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Renogy is new to the Lithium game, of course. These came out last fall so thereís not a lot of experience with them. No one knows how well they hold up or perform long term. Victron and Battleborn are the ones youíll find mentioned most often on this forum and would be, in my opinion, the lowest risk.

Renogy is a well respected company when it comes to solar. I doubt they are manufacturing these themselves. They might be great, and are certainly a good deal compared to Battleborn at $950ea. Iíve been very happy with my 500ah or Battleborn batteries for what itís worth.
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Old 08-22-2019, 04:20 PM   #8
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Renogy has a very good reputation in solar. I suspect their LI batteries will be very good. Time will tell. I like their Bluetooth interface to the batteries.
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Old 08-22-2019, 05:58 PM   #9
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Hi

Who knows who actually makes the batteries ... or the chargers ... or any of it. They are a marketing company and they likely are selling stuff made by others. The "software" in a charger or a battery is the big deal. Did they get it right or does it still need some help? How many times does your phone or computer download updates? Are you *really* sure they got it right the first time?

At this point there is essentially zero info on what the BMS in the battery does or does not do. Thus there is no way at all to even guess that they got it right. Since multiple others in the business *do* let you know (and guarantee) what the BMS does ... yikes ....

If it was my money, I'd let somebody else be the beta tester.

Bob
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Old 08-23-2019, 08:32 AM   #10
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Just ordered them so I guess Iím gonna be that tester. Iím assuming (yeah I know) that the whole lithium game is changing rapidly. Prices / ah for good products will be dropping so hopefully this is in that category. The reviews Iíve seen outside the forum look great. Iíll let you know. My project list for the year just got longer, planning on lifting soon as well as upgrading the charger. I hear that these Airstreams make for fun trips. They sure make for fun projects.
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Old 08-23-2019, 08:43 AM   #11
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Hi

Lithium for doing this sort of thing has been around for a good 20 years now. It's not quite the "shiny new" thing that a lot of people seem to think it is .....

Indeed "all in one" versions are a bit newer. Since there is no way to get inside the all in one's, any gotcha with the firmware is going to live on and on.

Bob
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Old 08-23-2019, 11:31 AM   #12
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Review!

https://youtu.be/gOqQp2Xjr6U
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Old 08-23-2019, 11:41 AM   #13
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It looks like this is actually coming from Renogy ontario california! Maybe these are the ones that have issues with the terminals loosening. I did not see anything about the warranty. Renogy normally has a 5 year warranty.
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Old 08-23-2019, 04:46 PM   #14
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Renogy also makes, what appears to be, a very nice device for isolation the AS's Lithium Batteries from the TV's Lead Acid Batteries. It is a neat Dc-to-DC converter with a setting for charging Lithium. Available in either 20 or 40 Amp.

https://www.renogy.com/renogy-12v-dc...ttery-charger/

They also make a 200 Amp Battery Isolator for only $99

https://www.renogy.com/renogy-200a-battery-isolator/
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