Which brand??Glad i spotted this thread. I just bought a 300ah of a different brand but given how many are relabeled identical copies this gives me something to check for before installing it out of sight in my RV and forgetting about it!
-- no offence, just thought it was funny.
You were close…hrm, I wonder if dumfume is chineese for 'stupid yanks'
That is enough --- if you have multiple in parallel.... I wonder if it works any better than the wattcycle with regard to over-current protection
Thanks Will, I will wait and see their reply to you, and if they change their minds on fixing these issues before I return mine for refund.
Have you opened yours yet? I got a deal a few days ago on ...Temu... 2nd time I have ordered anything from them but with the coupons they gave me it came out to $850 total for 4 of the 300ah batteries. I just got shipping confirmation today from Walnut CA which is where wattcycle ships from. For the price to capacity I think it is worth the risk. I have a feeling they are likely the mislabeled 280ah original wattcycle (300ah mini) that the manufacture is trying to dump cheap under random brand names. Even at 280ah is seems cheap. Worse case I plan to use this in a 48v system I am installing in an RV and I can connect them in serial and wire up a JK BMS I have in a 16s configuration.
The 300ah says it is a 200 amp BMS and all of the specs are identical to the wattcycle.
At least they are using good cells. It looks like they did do a lot of things right. Just a lot of early production woes that often get missed with products that are distributed directly from Chinese manufactures rather than build for existing companies that do their own testing and small batch production runs prior to production release.
I looked at cells. for 16 LF280 on 18650batterystore.com it is $1400 with shipping. I got these for $850 OTD. I already have one 150A JK BMS with 2 amp active balancing. I might just open them up and connect the balancing leads. Keep them all in the original cases but run them as a 16s. I have a compartment they will all fit in next to each other perfectly. Would just have to be creative with how I wire up the BMS. Would likely install it in the first battery then run a cable from the last battery ground to the BMS. It would be a little funky but would be a lot easier than making a case for a 16s battery that would weight 240lbs alone when all said and done.
Depending on what they look like when i open them up that will probably be the plan. that or make holes for balance leads and put lids back on maybe. Not sure yet but even if they are the 280ah cells I am at $59 a Kwh which is darn cheap if you ask me.
I agree on worth the risk. All ive done with mine so far is open the box and inspect it. My lid is not popped yet (kinda wish it was!) and doesnt appear to be bulging in the middle from BMS but when i put pressure in the middle of the lid there is definitely no empty space under it for it to flex into, so it's a tight fit regardless. Im tempted to jostle mine around and see if the lid pops loose because it would probably come off cleaner than me prying/cutting it open myself..
lol I was hoping for the same thing. They are being delivered today and I was thinking. Man I really wish I open the boxes and the lids are all loose...I agree on worth the risk. All ive done with mine so far is open the box and inspect it. My lid is not popped yet (kinda wish it was!) and doesnt appear to be bulging in the middle from BMS but when i put pressure in the middle of the lid there is definitely no empty space under it for it to flex into, so it's a tight fit regardless. Im tempted to jostle mine around and see if the lid pops loose because it would probably come off cleaner than me prying/cutting it open myself..
