powerjack 24-volt 15000W lfsp inverter new 5-14-2021 manufacture

"Power Sav" is a conceptual idea that doesn't work at all in real life--I've never had it work on a PJ inverter.  Even if it did function, it'll only "see" L1 loads anyway (i.e. L2 loads won't cause the inverter to exit "power save" mode).

Concept is for the inverter to turn off for a few seconds...turn back on to see if there's a load, and if not, turn back off.  If it detects a load, it'll stay ON until the load disappears.  At least that's the original idea.

thanks for the replies. i normally always leave the inverters running 24/7 but i am not always using the 15000 watt lf sp psw  inverter yet; as i am still assembling the 32 cell LiFePO4 lishen battery with 272Ah Lishen cells. i made a larger base for it and bought compression rods for the battery compression jig. so in the next couple days i should have the battery assembled. 

the "power sav" really still does not work evidently. thanks for your replies.

New question:

if the nominal voltage is 25.6 from a LiFePO4 battery (often closer to 26.8 to 27 volts) will the PSW LF split phase inverter have a cleaner sine wave? hope I am asking that correctly. the reason I ask is I was watching a video of Sean's where he was using a 12-volt power supply built by Sid but the wave form was not so good at 12 volts but was better at 14 volts or so. 

the input Dc voltage from my LiFePO4 batteries is often around 25.9 to 27 volts. I do not have an oscilloscope to check it out.

any input is always appreciated.

thanks

As mentioned elsewhere on the forum, the minimum DC battery voltage for a pure sine wave at no load can easily be determined by calculating the transformer voltage ratio and desired output voltage.

If your inverter has a PJ favorite 18v -> 230v transformer specification, and you want to 240v out...

240 * (18 / 230) = 18.782vAC input required for 240v output at no load.  18.782vAC * [square root of 2 = 1.414] = 26.56v bare minimum input battery voltage for a pure sine wave output.

Any loads will increase this number (also note that due to being 24v, the amperage losses are doubled.)

ok thanks for the reply... i am trying to understand the inverter capability more, in relation to my new 32 cell 25.6 nominal volt LiFePO4 battery.

i have it assembled now and the voltage is 27.35 (not yet hooked to the inverter). i have to make the cables to the busbar negatives and cables to the busbar positives. also i will make 4/0 cables from the bus bar to the inverter and add in a 400 amp class T fuse on the positive cable between the busbar and inverter.

i see they are now selling a choke for large loads on the inverter such as motors and such to help protect the mosfets. A bandaid?? 🤔

the 272Ah 32 lishen 3.2-volt LiFePO4 cells are configured in an 4P8S configuration and will have at least 1088Ah as they are said to have over 280Ah.

3.2volts X8cell = 25.6 volts nominal

25.6 nominal volts x 272 Ah per cell = 6963.2 Wh

6963.2 Wh X 4 (as there are 4 in parallel) = 27,852.8 Wh battery. 😎

i do not think the amperage loss will be much of an issue. but i am not sure of all the small details as i am not an electrical engineer. any explantion is always appreciated!!

here is a picture of the 32 cell 4P8S battery I connected yesterday. the positive is on the right end and the negaative is on the left end. the parallel connections were made 1st, then the series connections. it was at 27.35 volts yesterday at about 5pm. i had to put extensions on the multimeter leads to measure the positive and negative on the 1st row to 8th row as it ia about 63 inches long. 

the ( $13.97 including shipping)24-volt 5500 rpm Delta fan showed up in the mailbox. could have been there any day this week as only checked the mailbox today September 10th. ordered on august 26th so it came fast! 😎

mailbox is at end of 100 plus yard driveway and only check when i am going somewhere.

not progress today as had to run errands , it will be a few days before i can hook it up to the bigger 32 cell LiFePO4 battery.

Have to admit that my last two FFB1248 Delta fans burned out just before I was headed out the door to drive to Sean's place a few days ago (after about 1.5 years of service).  Smelled terrible--and delayed my trip half an hour to replace them with proper GS fans with a wide input voltage range.  (I originally had 3 Delta FFB1248EHE fans, and one of them burned out a few months after I put it in service.)

The listed voltage on those Delta fans is no joke.  If it's listed to a max of 26.5v, it will be prone to random failure if taken past that...

in previous videos, Sean recomended the delta fans. now does he need to do a correction or a retraction to his YouTube videos or what? I previously bought 48-volt delta fans for the 48 volt inverters,and now a 24-volt delta fan for this 15000 watt 24-volt inverter..

I just ordered 48 and 72 inch 3 pin fan wire extensions from the coolerguys.

I could get a buck converter to control the voltage to slightly below 24 volts from the LiFePo4 batteries because the LifePO4 battery is likely to always be higher than 25 volts and run up over 26.6 volts a lot of the time..

thanks for you warning of the bad experience with the delta fans. i could avoid the bad smell if i am lucky and decrease the input voltage a bit ....maybe.???? i can wire the delta fan circuit direct from the LiFePO4 battery. i have some led lights wired that way. with a small dc breaker for the on/off switch.

I made(quantity 😎 10 inch 2/0 cables today(actually 11.625 inches center of hole to center of hole) and added heat shrink. for the main positive and man negative out of the 32 cell LiFePO4 battery build. as always a different size bolt was needed so a trip to Menards to get some 1/4 inch ss bolts and washers and nuts for the 2/0 cable with 1/4 inch lug holes. the lock washers were the most expensive part 8 of them for $1.79. go figure.😥

I made 4 for the positive to busbar and 4 for the negative to the busbar.

then I will hook up a 400 amp class T fuse to the positive using 4/0 cable s from the bus bar to the inverter. 😎

any ideas????.

how much did a 400 amp breaker cost that is dc rated?

I bet it was a fortune!

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Roughly $80, "new" on eBay.  Search "GJ1P", that's the breaker series.

They were good, and it took us awhile to start having problems with them.  I previously could recommend them, until having them fail when taken 3v past the max rated value.  We live and learn.

well i hope i get some dependable ones(Delta fans) . i hate to be a guineypig on everything. i have redundant inverters just in case but hope the delta fans dont take a big smelly dump on me. i did hook up the negative to the wrong color busbar last night . found it this mornining. i like the negative to be black as much as possible and the positive to be red on the DC side of things..check check and tripple check all wires before the all is hooked up. .. i don't want the smoke to come out and have it be a silly error because one was in a hurry or the light and glasses weren't working good.. so ignore the previous picture i changed it out. will update more later. i think the 24-volt inverter is going on a shelf above the 32 cell LiFePO4 battery. need more space . 40 250 watt solar panels arrived on 2 pallets by truck today (10,000 watts more solar panels. so lots to do before winter sets in too hard. 

again thanks for all the suggestions and warnings..... still learning... 😎

today I'm building a mount for the busbars, class t fuse, and the shelf for the 3 piece SS 15,000 watt psw lf sp  inverter to sit on a bit today. slow but sure.

I plan to  put more load on the 15000 24-volt inverter with the 27,852.8Wh LiFePO4 battery build. All is being done off-grid.

seen a big fat wood chuck this morning. seems like he/she likes to he the pears off the ground but digs lots of holes.

 40 250 watt solar panels arrived on 2 pallets by truck today (10,000 watts more solar panels. so lots to do before winter sets in too hard.

WOW  amazing .    Sean  should do what you do  .   LG pouch battery is too  hot and dangerous .   

Right now they claim the LiFePO4 is the safest battery formula. I have 2 of the LiFePo4 batteries fully assembled and running for about 10 months 2p8S 24-volts each (13926.4Wh each); and I am  doing more assembly on the larger 4P8S 32 cell 24-volt battery (27,852.8Wh). I have to make some support structures for the busbar and heavy cables and it looks like the only logical place is a stand/shelf for the heavy 3 piece 15,000 watt 24-volt inverter is going to be above the 32 cell Lishen battery build. I  have to make it all sturdy. many trips back and forth to get boards cut to size out in the shop. etc. slow but sure.. it always an amazingly slow process trying to make things fit in an orderly fashion.

Even the cell phone camera had a bunch of things that made the pictures look black and white, which I did not want, I want the color coding to be more obvious in the photos. I send the cell phone photos over gmail so i can add to my posts.

learn by ones' mistakes -- I guess. 😎

Sean really needs a larger battery bank to run the inverters. Brand new LiFePO4 cells from China now have a 6000 cycle claim at which time they are supposed to be at 80 percent of new capacity.... that is like 16 years or more. then a newer technology will be out there; if one can keep the greedy corporate types from hoarding the technology from the common folks.🙃

A powersupply that does not mimic real life battery power???? I do not run my inverters from the grid --- they are all off-grid >>>> that's the whole point of an inverter in my mind. independence and self-sufficiency is the goal...

The Electrodacus SBMS0 will control the Electrodacus DSSR20's so the batteries will not get overcharged. no need for cell balancers as the SBMS0 does the cell balancing as the cells are being charged.

hopefulluy the PowerJack LF PSW SP inverters will survive the winter heating season demands, so I do not have to spend so much on propane.

the inverters seem to be my weak link at the moment. but i have not put them to heavy use yet... just speculation at this point.😎

More later!

I see they are now selling a choke on eBay for large loads on the powerjack inverter such as motors and such to help protect the mosfets. A bandaid??

what does the choke do to aid the LF SP PSW powerjack inverter? can you tell me? 

I have not opened the stainless steel case of the 15,000 watt 24-volt LF SP PSW inverter yet.  

I am trying to get it on the shelf above the battery bank today. A friend will hopefully come to help. It is a bit too heavy for one person (at least I am not able to safely lift without help to a higher elecvation). I think it is about (44 Kg = 96.8 pounds) or so plus cables and support board. The 2 pieces >> the transformer is a lot heavier 26kg than the control box 18kg below but I need them to be connected together before putting on the shelf. 

feels like a ton when your trying to safely lift up higher. just listened to 16 tons by ZZ Top on you tube the old classic revisited by Tennessee Ernie Ford. 

i would reccomend to others to keep it low and leave access to all 4 sides; but in my set up that is not really an option as space is dictatating placement and making life more challenging. 

batteries occupy all the low space in the solar power shed.  need more space.

raining here again ---  typical fall weather coming. 

more later😎 

what does the choke do to aid the LF SP PSW powerjack inverter? 

I  think powerjack  copy Sid  idea  just like the  LF Driver  they  sell  with some  8kw  ver11.1  control board .   I   make a choke  for the positive  dc input  for about  20 dollars parts from ebay  .   Powerjack   should  copy  Sid  idea for  10uf  capacitor  for  L2   to suppress  emf  to help  washer machine  to  run  better .    I  run  my  15kw  PS  16  hours  now that the temperature  is under  90 degree F  and can wait  for the 12kw  GS  next year  to run  the 4ton heat pump .