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Well, i don't want to make an off grid but i was wondering if there is a way where i can use that inverter and also store energy on the batteries and powering the house from the batteries too.

Yes, but the inverter should be connected to my battery pack, right ? So this 100V DC input should be for the battery pack... Or am i wrong ?

100v ?

Hi guys. I have a very interesting second-hand solar panel kit for cheap. I have some questions. I want to store the energy in my battery pack 12v but i can make it to 24v. The big problem is that the inverter has a minimum DC input of 100v (220v nominal). The kit is huge : 24 panels of 235W...

Should i do a top balancing of the 3 cells and the super cell too ?

I have a cell of 50Ah capacity (not new, real capacity is 45Ah). This wiring ? At least, all to 3 others cells will now be used at full capacity right ?

You are right. I see what you mean.

Hi, I have a LiFePO4 4S 12V "100Ah". One cell has much less capacity than the others. It has 70Ah while the others 90Ah. I'm fine with it but i was wondering if i could do something. I know that the best solution would be to buy another cell with more capacity. My issue is that the weak cell...

No, is a said it in my previous post, the charger destroys your cells !! because they are putting too much heat... For example the cheap Liitokala S8 charger has 300 ; 500 ; 700 ; 1000 ; 2000mA current. 300 mA for an AA NiMH is ok but when you try to charge an AAA 800mAh capacity with 300mA, you...

What do you think about the timer ? If i charge a 5.8Ah cells in parallel at 580mA for 10 hours, Is this a good indicator to stop ? How reliable is it?

Here is my final feedback. When you can't set the current yourself in a smart charger, this is so bad because you are not charging the battery at C/10. I think that is why my batteries were so hot in the smart charger because of too much amps delivered (C/2). As we know, there is a thermal...

Do you mean that there won't be a drop in current when the voltage reaches the one I set ? The same as on lithium/lifepo4

Hi, 1.a) Can we also charge a NiMH cells with a bench power supply as a lithium cells ? I put 2 AA and 2 AAA NiMH (2500 + 2300 + 800 + 800mAh) on charging in parallel. They all were empty. I'm charging them on constant current at 0,350mA (so 1/10 capacity) and i set a maximum voltage to 1.55v...

Hi guys, I have a basic question. When a switch is rated for 30A 250 VAC max, how do you calculate how many amps can it handle for 12V DC ? If i go for 250*30 = 7500W There is no way that the switch can handle 7500/12=625A. So how do you convert from AC to DC about the electric current ? Thnx

i showed them all the pictures, but that was their answer. I also have put the link from this thread to show them what we are talking about.

Liitokala's anwser is "our batteries are sent out after strict inspection, and the capacity of the batteries is in accordance with the description". No refund. Never trust again them, they are scammer.

I got a load battery capacity tester. Here are the result. As expected, Liitokala sent me a cell which is half the capacity compared to the other 3 cells, 50Ah instead of 100Ah. I contacted them, let's see their answers.

full copper

It is under a bolt of course. I can't screw it if don't put a washer. I need two washers with a bus bar.

Only one day after i connected it back, i see a small oxydation on the Neg terminal on that cell, where the B- and small negative are connected. What is the reason ? Is it due because the washer is in aluminium and the lug in copper ? Oxydation is between them.

I was also monitoring the cells with a DMM on charging and discharging. The poor cell couldn't take anything from my bench power supply when i plugged in. It means that initially it was fully charged in series when the BMS trigged. I will check the connections but i don't know what could go...

Yes, they were all on same voltage.

What do you mean by funky bus bar ?

Firstly, when i got these cells, i put them in series and charged them. I was surprised that the cell 1 triggered BMS on 3.65v when the 3 others were 3.43v. So i charged them separately to 3.62v (not in parallel), didn't dismantle series. Cell1 was 99% already full. All the 3 cells took about...

100Ah

My pack has a strange behavior even after top balancing. The first cell hit the bottom much faster than the others. It seems that i have a bad cell right ? After it was "fully" charged to 3.62v each, i drained only 48Ah from the pack before the cell 1 hit 2.5v and triggered the BMS. So what can...

Yea. I'm doing now a second pass, charging this time to 3.62v calibrated on the DMM.

After 6 hours resting, cells dropped from 3.58v to 3.37v

Do you mean that my cells have to be above 3.45v after 24 hours on resting ??

At what value should i stop charging the cell ? The power supply shows 3.59v (was set to 3.6v) and pulling about 0.2 to 0.8A. The cell is 3.56v

yea almost done. Can the cells become unbalanced when the battery is not used often ?

OK the power supply just switched to CV mode and the amps are decreasing slowly. Cell is now 3.43v. Going good.

I put the voltage limit on 3.60v. Is it fine to keep that for top balancing ?

I think as you. Now with the good wires, the power supply will switch by itself on CV when the cell is almost full. The fan starts and stops every 10 sec ? I will reduce a little bit the current to prevent its death. It is running 2 hours now at 10A, the cell is only at 3.37v. It means it took...

Yes i'm not touching anything when it is connected. According to this chart, it seems that i'm in stage 1. Wonder why it was on CV before i changed the wires.