Most reacted posts

I recently upgraded my DALY BMS for the JK B2A24S20P with the larger screen. Install details are a little sketchy, but this option has the display which as a display connector and a switch wired to one end with both going into the interface box, and two cables coming out of the box which plug...

After about 9 weeks (bought them during the worst part of the year), I finally received the 20 Lishen 272 Ah cells earlier this week. Very well packaged, two per box. I bought 20 just in case there was a bad cell, and I hope to build the 4 extra into a 12V pack if all are fine which is what I...

Here is the installation so far for the house UPS. Not fully wired yet, but there is a two pole generator transfer switch installed. This will be fed by either the main panel (40 Amp two pole breaker) or a generator fed via plug installed outside. This will feed the Growatt utility or...

Inside of the Inverter, those spaghetti cables.... Yikes... Not the worst I have seen though. Clearly a lot of components fit together vs a custom designed unit. Can't complain based on the cost if it performs well. Solid bus bar power carriers from the battery connectors to the boards...

Almost finished the Battery Disconnect box: 200 Amp DC 2P Breaker / Disconnector - feeds the inverter Precharge Circuit with Volt/Amp Meter - The meter will indicate voltage of the Inverter caps so you know when it is fully charged. 12Volt Sub System - I needed 12V to power the meters, so I...

I bought 20 of the Lishen 272 AH cells, so far so good. Arrived in perfect condition, no issues with threading on the lugs. I fully charged and discharged one cell and it rated just over 280 AH. 16 going into a 48V pack, and 4 spares, or I may make a 12V portable solar generator with the...

Got the bms shelf done. I also extended all of the leads of the balancing harness by 18" as they were too short for where I am putting the BMS and installed ring terminals. Hooked everything up and jumpered the B- to the Battery terminal and I get 53 Volts from the Battery + terminal to the P-...

Yes, but please take the context of the OP into question. He wanted to know if he was being scammed because his voltages didn't come up quickly, and I was explaining that there isn't enough amps going into the cells at 2A to make much of a difference in the time period he is referring to...

Have been waiting (and buying) the parts of the battery box as time and money permits. I have built numerous items with 8020 extrusion for work so I wanted to do something similar for the battery box. The base of the box, using 1" extrusion. Two banks divided in the box. There are castors on...

We couldn't possibly generate enough electricity in the US to power 100% electric vehicles, not even close... Would need massive Fusion, or orbital Solar arrays to supply that much power.

Nice. I uses a momentary button with a seperate switch to precharge using an NTC thermistor and a power diode to prevent backwards power from the inverrter. A resistor would have worked just as well. with the disconnect off.

2 Amps is almost nothing for 4 large capacity cells. that is only a half amp per cell... Get a battery charger that can put out 20 or 30 amps, or more.

Well, got the battery completely finished, and all wiring done. Today I did the first power up of the system and did testing. Seems to work well, although I need to check on some settings for the Growatt ralated to the battery charging settings. I had a problem with the first turn on as I...

I am doing this now, hybrid inverter, 14KW LiFePo4 Battery built from Lishen cells. I have a thread going, and numerous other threads of people doing similar things. It has been a really fun project so far...

Yes i understand. I was replying to the op who was trying to balance his cells in the 3.3 volt section of the discharge curve.

One thing I want to point out is that the chart in your post is for a lead acid batteries not LiFePO4. While those settings will work for a LiFePO4 battery, they are not optimized and can damage LiFePO4 batteries. Float charging was invented to keep lead acid batteries charged because they...

Yes lol, that is what i said in my original post. ?

In my case, I can set all of those parameters in the charge controller which is part of the all in one hybrid inverter (charging limits) and that will look after the battery. I am fine just relying on the BMS as a last defense against a failure in the charge controller. If you ONLY have a BMS...

If you haven't bought a charger yet, why not get a charger that is set up for LiFePO4 right from the beginning then you don't have any charging gymnastics to deal with?

New to the forum, currently working on a critical circuit UPS for the house, and plan to add PV array next year some time once it is up and running. I experience a lot of brown outs, and short term power outages - maybe 30 minutes to 30 hours from history over the last 5 years. The brownouts...

The weather has been nice finally this last week so I was able to get the external AC Disconnect installed. Built a semi-enclosure for it to mount it on the clapboard siding properly, made from 3/4" PVC Sheeting. Made a similar one for the Generator plug as well. Now the Inverter is wired...

Hi Luke Your BMS has an active cell balancer so you only need to use that and not the separate active balancer. Your BMS is a bit different than the one Andy is using, which uses an internal bank of electronic switches to turn the power on and off. Your BMS needs external relays to work. You...

for my 16S battery - After some trial and error with top balancing, the procedure I found that worked and was very easy was as follows: I used an 8S hobby charger with balance leads for the two 8S packs. Actually I had two hobby chargers, one on the 8S banks, and one I was using for...

Below is the updated wiring diagram. You need to connect the ACC+ to the Pre-Charge + wires in order to power the 12V releays.

Wow glad you are ok. A reminder about how much energy we are dealing with and how easy it is to have that one unplanned moment... A reminder to be deliberate, careful and think through every move. I have found myself doing an absent minded movement with a tool or lead a couple of times. Hope...

Ah, thanks for the explanation. So the Victrons are set up for 50hz 220 and the transformer converts to 60hz for US operation. Makes sense. I know they make good stuff, but are you in the price range of a SolArk with that setup? I know some like discrete components as well.

lf you have a lot of motor loads i would recommend a low frequency transformer inverter. I have the 6kw two phase Growatt hybrid inverter but havent turned it on, still building my battery and waiting for a nice day to finish the outside wiring.

I have used the expanding polyurethane for other purposes, it expands to many times its liquid volume. The pads mentioned earlier seem like a much better alternative and that expanding foam is pretty much permanent so you wont be able to do much with the pack once it happens.