diy solar

diy solar

Rept 280ah from Dongguan lightning. Good cells

Scph9002

Solar Enthusiast
Joined
Aug 28, 2020
Messages
252
After 3 month of railway shipping across Europe I received my 40x cells.

All cells arrived with no shipping damage and all cells had normal voltage after 3 months of resting.
Have capacity tested 8 cells in 4s config and they tested 280ah+ with 0.2c discharge

I got 32 cells in a 48 volt system and 8 cells as spare to goof around with. Got extra daly 12v 200a bms:es so could resell it as complete 12v batteries and easely get back x2 of what i spend on them lol :))

Cable management is still a work in progress. Never ending mission to get it tidy lol
 

Attachments

  • IMG_20210808_230407.jpg
    IMG_20210808_230407.jpg
    186.3 KB · Views: 38
  • IMG_20210808_230415.jpg
    IMG_20210808_230415.jpg
    173.1 KB · Views: 40
  • IMG_20210808_230441.jpg
    IMG_20210808_230441.jpg
    168.8 KB · Views: 38
Glad to hear good test result on these REPT 280Ah, I have been running mine (12V pack, Late June 2021) for over a month now and keeping my eyes on them to see how well they perform compared to the Lishen 280Ah (12V pack Jan 2021).
Time will tell how good these cells are.
 
Glad to hear good test result on these REPT 280Ah, I have been running mine (12V pack, Late June 2021) for over a month now and keeping my eyes on them to see how well they perform compared to the Lishen 280Ah (12V pack Jan 2021).
Time will tell how good these cells are.
I see you posting on a lot of these battery threads, so I figured I'd ask you're opinion, OP too, why did you choose the vendor you ultimately bought from?

The cheapest price of a 280ah LifePo4 on Alibaba right now seems to be about 77$ a cell from Shenzhen Senberry Technology Co. Ltd. for Lishen cells. I realize these are different batteries than the REPT, but what are the real life differences? Considering you have both, is there a quality difference/one you would prefer if to buy again? Difference in size? Also what should I look out for when I get ready to purchase? Senberry seems a little too good to be true, they even boast a 10-15 day delivery! It seems to me looking around Alibaba that the companies promising extremely fast shipping are also the ones that seem to be a scam. This is the post I'm referring to:


They don't have shipping costs on their page either, just instruct you to contact them, which also seems a little shady. I'm still in the process of saving up some capital in order to be able to place an order for my up and coming box truck camper build's solar system. I'm thinking about going with a 24v 280ah battery bank (to start) with a Growatt charge controller or maybe an Mppt, the Growatt seems to be a bit more capable for not too much more money. If you have any opinions or advice on that as well, it would be appreciated. I can't decide if going with an all in one or building it out piece by piece will be better/more cost effective. I do want to maximize my possible array, as I plan to be completely reliant on solar, (for cooking, heating/cooling, refrigeration, etc.) but at the same time want to be comfortably so, and not have to constantly run the engine to charge things up when I'm trying to boondock for long periods of time. As far as panels go, I'm considering some of those used SanTan Solar T 250 watt panels, simply because it would max out my dollar to watt ratio and keep initial costs low. I could fit 4 of them on the roof and expect just under 1kw for half the price.

Anyway, I'm getting a little off track, we were talking about batteries, right? Reputable buyers, that's the key, but how do I know who to trust?

Thanks sticking with me, cheers.
 
I bought the REPT cells after seeing other threads about EXILPORC REPT cells, so I decide to give them a try, same for when I first bought LISHEN cells from BASEN.
I have to say that I am very luck with my purchases from BASEN and Exliporc. Right now the price of REPT cells has gone up to $110, shipping also has gone up.
You need to contact them to get the real shipping charge since they need to know the zip code to give you accurate shipping charge, then you can also try negotiating on the price of the cells too.
If you want to buy from trusted seller you can buy from Amy Wan or from Michael B.
 
Some chinese vendors have cells stocked in warehouses in europe and most likely usa also so 2 week shiping time is not impossible. 2 weeks shipping time from china tho? Hahahah ha ha.. ? Impossible. Batterieses ship on railway or sea only. Never air as far as I know
 
Today because of no sun only clouds for a week or so I finally depleted my 2P16S bank.
99.X% capacity used and i got out exactly 30 kwH. It is such a nice and round number.
That means the lowest capacity cell out of the 32 cells in my bank is 293Ah. Not bad for 280ah cells.

I do believe these rept cells are really highly graded, graded high enough to still have the laser engraved QR code intact from factory at the very least. I havent inspected every qr code but it seems they are not from same batch because i saw a difference of up to 6000 between 2 cells.

Model number??: KC.J.000005736
Series Number: 201015001329 <- last 4 digits in my group of cells differs between 0100 and 6000 something

Edit: Quick reserach indicate this is not the original QR code. Grade B cells I guess for some reason. If I would have peeled off the top cover more I would have seen a scratched QR code center on minus side of the pressure vent

Oh well battery works well enough
 

Attachments

  • IMG_20210911_213108.jpg
    IMG_20210911_213108.jpg
    128.5 KB · Views: 16
  • IMG_20210911_215619.jpg
    IMG_20210911_215619.jpg
    166.4 KB · Views: 15
  • IMG_20210911_220304.jpg
    IMG_20210911_220304.jpg
    204.7 KB · Views: 13
  • Screenshot_20210911_220625_com.teacapps.barcodescanner.jpg
    Screenshot_20210911_220625_com.teacapps.barcodescanner.jpg
    92.3 KB · Views: 17
Last edited:
Back
Top