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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...

I just went through an ordeal with Amazon trying to get a refund for a defective power supply I returned. Every step for the return was followed by the numbers. I requested the return Amazon sent a return label Scan code. I took a picture of the scan code Went to local UPS Store with the...

I have two OverkillSolar BMSs in my possession. Both cost me about $150 total. This one I ordered and received about 2 months ago.......This is the one everyone seems to be getting. It indeed looked brand new on arrival. And one I received this week.....I do not see this one anywhere else...

When people don't use a title that describes their content or question, it deprives the search index of the ability to find that content to help others later. ALL posts should have a Title which accurately reflects the concern or content Is this in the forum rules? I see it happening a lot...

In the illustration below I want to be sure the ANL fuse will react (blow) to a full battery current short circuit at the point indicated by the green arrow. I'm pretty sure it would since since the current overload still has to pass through the fuse. Have I provided enough information? Is...

I have a XiaoXiang BMS which is basically identical to the one OverkillSolar sells but you're better off paying the small difference for the OKS BMS imo for the warranty. What happened was I fully charged the battery to 3.65v per cell then reset the Remaining Capacity to full, Then discharged...

Let's say you are testing a LiFePO4 bank of cells that together make up a 12v 100Ah battery. Each cell is a standard 3.2v cell with max voltage of 3.65v Fully charged you will be at 3.65v per cell so times 4 that is 14.6v fully charged. So let's say at the moment it reaches that full SOC you...

These are NINTHCIT Grade A New 120Ah 3.2v cells Never been charged or discharged, just got them. Voltage on each cell was 3.300v for each of the 4 cells. No variations DataSheet - Internal impedance:0.2~0.3mΩ Im getting nearly 10 times the specs on IR..... Cell 1 - 16 milliohm Cell 2 - 17...

So within the next few hours my new 120Ah NINTHCIT cells arrive. Of course, they will undergo rigorous scrutiny. Few people have tried these yet and information on them has been slow to trickle in. I hope to change that. I'll check them thoroughly, weigh each cell, test their arrival voltages...

Is the current adjustable? in other words, if you buy the 20Amp model, can you also charge at lower rates of current than 20Amps?

So for quite a while I suspected that a lot of Amazon reviews were fake....but I wasn't sure how. A LOT of mediocre Chinese goods are flaunting tons of stellar "American Consumer" reviews of their products.....and many are fakes. Amazon is in the business of making money from sales...

Hello, I just received a Meanwell PB-300P-12 battery charger and I just wanted to tell others about the way it charges batteries. I looked at a number of different chargers and settled on this one, but I admit I did gloss over the recommended battery range it is designed for. Had I pad better...

I have a 29" Mountain bike that I really like but lately I've been wanting to add electric motor power to it. I can still flail my legs as hard as I want with the kit on and actually disable it but then if for example I get an alert that my home alarms is going off or some other e-mergency, I...

You have a Dodge Minivan (just go with it for this scenario) :) Your budget is limited and saving is important. You want two, 100watt solar panels on your roof. The wire to connect them will be about 7 feet max. Would you connect them in series or parallel and why? Consider the...

We all know the importance of a BMS for protecting battery packs. How do you protect individual cells when charging / discharging just one cell that is loose and not in a pack?

Hello, I need some opinions. I am working with a brand new, 12v, 100Ah, 1280Wh battery. It is on it's 4th cycle and I'm uncertain as to it's quality because one cell does the full charge "runaway" thing and then also dies flat first at the end of discharge before the others. It seems to me...

The Battery - 100Ah LiFePO4 with BMS, no access to insides Desired Charger - Specifically for LiFePO4 10Amps or better Adjustable termination voltage for storage at 3.1, or low full charge at 3.4v or 3.65v On/Off switch $120 or less Is that too much to ask ?

Quite a few times I read about people overcharging their LiFePO4 battery packs and I just didn't understand. Now that I have one, it makes perfect sense. But ONLY now that I'm trying to charge my own. Yep, I'm not the brightest of bulbs. So, I want to charge my battery to 13.4v. So I set...

Hello, I just recently ordered a Rebel LiFePO4 100Ah battery and it's scheduled to arrive Wednesday. Seems there are a number of new ready made LiFePO4's coming on the market. Since these batteries are sealed and you cannot open them to get to the BMS and cells, I am exploring options for...

Let's say I have 200watts of solar panels and I'm getting 10amps from them. They are charging a battery bank with 100Ah capacity. At the same time, I'm drawing 200 Watts from the batteries. Will my battery SOC remain the same ?

I know there is a How To "somewhere" here, but I'm too lazy to look for it right now and besides, I'm not sure it will have the specific answer I'm looking for. Besides it's more interesting to get live opinion and discuss them back and forth. That's what forums are for no ? I took a quick...

So some of us buy and use MightMax batteries for various purposes. I just bought some replacement batteries for the various battery backup devices I have in my office and tested at least one of them for capacity. The battery in question was an ML9-12 common to APC and many computer battery...

I have noticed that some batteries have greater capacity at higher voltage while other have all their capacity at lower voltage. in this example I'm speaking of lead acid batteries. I have a somewhat fancy (Chinese) DL24P Capacity tester to check battery capacity. Some lead acid batteries will...

Xantrex C40 Charge Controller I have this little gem in one of my mobile micro apartments and I must say...I am VERY happy with it. I have one, 100watt solar panel on the roof of my Caravan (a 2nd panel is on the way) and even with the one panel, it does a phenomenal job of keeping the...

Does anyone know why I can't post a Vimeo video even though it's listed as an approved Media site ?

I have an odd one. I have not seen one like this before and am not sure how to interpret it. It is from a brand new Bestek 500Watt Pure Sine wave Inverter. I would say it has a problem. Do you know how to interpret this?

Hi, So I just received my Overkill 4S BMS but my batteries aren't even on the radar yet and could be into June before I see them (ordered via Michael) I'm afraid my Overkill BMS return period will be long over before the batteries get here so I'm wondering if there's a way to test it before...

Before I bought better Solar Controllers, I bought a few real "cheapies" One might be garbage can bound depending on the answer to his question....... If I have the Upper charging limit set to 14.2v........ Is there any circumstance under which I should be seeing 17v at the battery terminals...

Hello, Today I finally received my much anticipated DL24P 180Watt Capacity tester. It's just a blast getting new toys. Until they don't work properly. So I tested a NiMh battery with my multitester and it shows 1.344v. After making sure I was connecting it properly to the DL24P, I get 0.42v...

Just today received an EPEVER Solar controller from Amazon that lacks lithium battery support EPEVER 40a Solar Charge Controller+MT50 Remote Controller Set, TRIRON 4210N 40 amps 12V 24V Lead-Acid&Lithium Support...

I am wondering the best way to keep my normal home electric service (AC) but to supplement (or offset some of it) with Solar. I do not want to sell any solar power back to the utility company so I'm not sure Grid Tie is what I want. And I do not want Off Grid, since only a small amount of...

Just tried to call Overkill Solar in Naples Florida for Support. (Phone number given on Purchase Receipt) All I can get was this..... "The person you are trying to reach has a voice mailbox that has not been setup yet, please try your call again later" Seriously ???

Just wondering if one is better and why? Thanks

Recently I bought a Jackery 500 Explorer. I will say that as far as quality and performance it exceeded my expectations and even though I already have 4 gasoline generators of various sizes (Mostly Inverter units) I felt it would be good to add this solar generator to the stable. I purchased...

I realize we are moving away from Lead acid and towards lithium batteries but.....I still use them in my cars, motorcycles and scooters They say never discharge them below 50%. But some say the "never go below voltage" is 10.8v So, if you were Discharge Testing a Lead Acid battery, what...