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Tesla model 3 batteries are made in the USA. AllCell is another big US based battery manufacturer and there are several more. The point being, the technology already exists in the USA to build the batteries here. I think your point is good in that considering the rising shipping costs, chance...

More and more it's becoming imperative to get America back in the game of manufacturing. It's going to get worse if that does not happen.

The very best way to determine that is find the DataSheet for your specific batteries. It varies somewhat, and mine arrived at 3.300v per cell. But as others have pointed out, they are shipped at lower voltages to comply with law.s

Please provide evidence of your claim. I say the RV community uses 50% state SOC far more than 75% SOC as a discharge rule for flooded lead acid. in addition, we are talking about home use as pointed out by the OP. You are referring to an off topic potential use. The topic is using these at...

Just noticed something......the label on your 29DC is different than the one on mine......

You're welcome. Absorbent Glass Mat The battery you bought is a pretty good battery by the way. Not easy to find. Do you have one or two? Mine were on sale for an unbelievable $89.95 !

Be careful of the advice you get on forums. It's not always accurate. You saw that with the 16v number you got. Always do your own research to back up what you are told. Ask for evidence.

You are wrong. Standard practice for 12v FLA batteries is discharge to 50% for longest life and best capacity. Not 75% Where are you getting 12.2v ? See chart below. I have done discharge tests with this particular battery in the past week. have you?

Your charge controller seems to have been doing it's job properly. It will raise the voltage to 14.4v (absorption) forcing the battery to absorb a full state of charge. After a while (could be hours at that voltage), it will drop down to around 13.5v which is called "float" voltage. That is...

No. do not charge them to 16v. Absorption is 14.3v and float is 13.5 Do not discharge below 11.89v if you want them to last as long as possible. I just bought 3 of these and capacity tested them. From full charge (float voltage) to 11.89 (45% SOC) I got EXACTLY 50Ah (perfect) 16v is...

Ordered middle of March, received end of May. Not bad!! So 10 weeks from order to in your hands. And they are good to go. Congrats !! (Canada is on better terms with China than the US and I wonder if that is a factor?)

yep, meant to say "in-convenience"

Given the scandals of fake Amazon reviews, I'm not sure that's good advice anymore.

Generally speaking, it is said that Lead Acid batteries last longer stored and used at around 77F ambient temperature. And that for every 15 degrees F above that, battery life is reduced by 50% So at 92F ambient, your Lead Acid batter will have it's life cut in half. South Florida, South Texas...

Yeah, since I posted this I've come to discharge to battery terminal voltage on non BMS batteries like lead acid and on LiFePO4 I let the BMS cut off the discharge. My main point of contention was terminal voltage vs dummy load indicated voltage.

At 24v, 2000Watts is the maximum rated PV array power for that unit. There are ways to bleed off that extra 100Watts, however, before the controller It "probably" would handle the extra 100watts.....but.......

I fully charge my Lead acid batteries then for capacity testing purposes, discharge them to 11.89v. Yesterday I got exactly 50Ah on a new, Walmart Marine Deep Cycle Everstart Maxx 2 year 29C battery by this method. It was $99.00 so you can get a solid and safe 100Ah capacity for $200 this way...

"A cheap one from India" Sometimes that's the answer. Unless it was configured incorrectly The highest a lead acid battery should ever go is 16v during equalization only. and only for a short time and only a time or two per year. Bring the voltage down and hope for the best. I suspect it...

Good luck. I think we're both getting ready for the same thing (y)

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Lead acid batteries....... Best kept at 77F. For every 15F above that, battery life is reduced by 50%

Basically yes. Either one will have a shorter life if kept in a hot environment, with exceptions. But sometimes you just can't do anything about it. I would Google High Temperature batteries because some Gel and Lithium batteries are made for warmer temperature use. I keep my batteries in a...

I was just dealing with this today. Lead acid batteries are best kept at 77F. I read that every 15F above that reduces battery life by 50% https://batteryuniversity.com/learn/archive/can_the_lead_acid_battery_compete_in_modern_times By that token, voltage drop will kill efficiency when going...

Good question. To be blunt...I cannot get any reply from them at all. Weeks now with no reply. I'm not sure how anyone could get warranty service in any case. I think in America we are beginning to feel the impacts of total dependence on China manufacturing. Steve posted a lengthy apology at...

I would be amazed if you can do anything with them. They should be heavily sulfated. If that turns out not to be the case buy a lotto ticket ? :)

Sure it does. It's on their website. Seems much of what you say and claim is made up randomly. I posted the screen shot evidence of the draw using a well known and widely accepted monitor. Bye

That was a question. Don't agree with what? Renogy publicly posts it's idle draw at LESS THAN 1 amp You can find it at their web site. My meters concur. It's 400mA at idle.

My Renogy 1000 draws 400mA at idle. Is that 4.8 watts ?

4 days on less than 50% charge is likely to have caused some sulfation and hardening. How much is anyone's guess. A good capacity test is really the only way to determine where they are now. Catching deeply discharged lead acid batteries quickly is key to saving them. Sometimes with fresh...

No no no !! That's $800 with tax. :eek:

I ❤️ my 1.7cu ft Galanz AC fridge. !! Perfect for me and many others. Energy is cheap....warranties are a hassle. Saved a ton, cools very quickly, energy efficient, no problem with my 2 100 watt panels .....and did I mention I SAVED A TON ??? lol Hold my beer......? Actually, it uses...

OH! The irony!

When I took the fan off of my unit a day after it arrived, I found way too much thermal paste on the mosfet. it was globbed on there heavy. Anyone who does it right knows that thermal past should be used as sparingly as possible and only to fill air gaps. Too much has the effect of insulating...

Did you post the parameters in your BMS ? Everything properly set for 24v battery? Maybe your inverter is causing the fault?

Your cells are totally different from the ones I received. Odd? Oh, mine are 120Ah and yours are 125Ah. Mine passed every test...except of course the long term test. Keepers.