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Nice. If you guys are shipping surface (boat) often the shipping price won't change so even if you find a good deal elsewhere check if shipping is free otherwise it may still be more economical or close to it to buy from the cells' seller. As @ghostwriter66 pointed out, if it's like a buck to...

So does it have 2 bluetooth adapters on there? :P

Yes, this is like what happened to me with another vendor. In the end I resolved it (thanks to advice here) by purchasing something cheaper and ticking the box "save card" from another vendor which went through instantly Then I was able to appeal a new transaction with the original vendor...

I've bought both. Recently got some Lishen's in; they look (cosmetics only) better than the 280 Eves I've used. I haven't tested the Li shens yet but I was really impressed at the presentation.

OK strike that one. I usually have crazy ideas and only 5% of them make it to fruition. Thanks fellas.

Yes, this was specifically why I made the other purchase. I don't need those inverters, I'll just sell them, even at cost if necessary when they arrive. SO you are exactly right. Earlier today the seller suggested drafting a smaller order. So we did just half the cells I had planned. I tried...

Yeah so my strategy is to use about 60 or 65% of the middle charge zone (about equal on both sides of the 50% mark as @Will Prowse recommends in his video Lithium Battery Longevity: How to Double or Quadruple the life of your Lithium Battery). So, I had this idea to buy a couple extra cells to...

I just realized there is this greeting thread for newbies to the forums; so I figured I'd follow along with the local culture and introduce myself even though I'm here for like a month already. I'm from the states, I studied Aerospace Engineering in school but worked as a real-time embedded...

The sales staff are the ones informing us that these are EVE cells; I asked and they told me that. [I'm not making any claims if they are or are not] but it's ABSOLUTELY indisputable (and thread relevant) that the seller is claiming that's what they are. For us to just say it's not on the spec...

@MisterSandals so here are the numbers from the Battery university graph which WIll referenced. I just looked at the chart and extrapolated the numbers. Note All these assume never discharging bellow 25%, the Batt. University guys say these are however lab results and that for unknown reasons...

I agree with @Dzl using a power bank is a huge improvement on this idea. I think this is more of the norm of how this is done. Just be sure that the bank you get can be charged and discharged at the same time. The other nice thing about having the power bank is the phone keeps charging when...

Since you didn't see the earlier part of the thread here's the brief recap: I was just speculating to appease the fanboys since battery university and Will shared that you can greatly increase the lifetime of LifePO4 by not charging to 100% and not discharging to 0%. Ped was saying that...

Thanks! Yeah I'm real psyched about it; it seems really awesome. Can't wait to try it out. Thanks for replying I know you're a busy guy. I read your book btw :)

Yeah if this were my second order, I'd probably be OK with a bank or wire transfer; the the card I'm using the fees max out at $40 I doubt a wire will be less than that and of course zero protection from that method. I'm getting 50 cells through another vendor since the shipping is significantly...

Yeah I have 3 identical DC bench chargers I got on AB. 1 of them I witnessed twice suddenly decide to spike it's voltage up over 4. This is what @fhorst is talking about. I got these from an Alibaba seller with nice ratings. Since then it's been fine. All 3 of them seem to work great but there...

we don't have that much space on the lot; entire lot is like 250 sq. meters, much of that is occupied by the house. Probably will build a carport using bifacials though.

Wow, thanks! I literally got an answer in like 60 seconds after posting my question. This forum is awesome! Wish I knew about it years ago.

I've had arduino nano's die. I advise you to source a real Arduino for your prototyping feel free to use the cheap Chinese clones but when your system is live use a pic with quality components on the board. A few extra bucks now can weed out the possibility of a more expensive problem later.

I'll just chime in here that I used to use a 12v system with home-made panels and the change to 48v has been awesome. I actually wanted a 36v system but there just wasn't enough equipment out there to support that choice. I still get a kick out of the thin thin wire I have coming up from the...

From the very little I've gathered reading and watching videos so far, a lower C rate in and out is better for their lifetime. For max longevity one site recommended 0.2C rate so with these that would be 0.2*280 = 56.0 amps! So your 6.5 amp is like closer to a 0.02C, super safe :). Oh you've...

Hey shouldn't one of the leads be on the opposite end of your stack of cells? Seems like you will front load the one cell by connecting to both terminals of the same cell?

I also was tempted to grab 4 of these for testing. I was thinking, "what if they really are graphene." Interestingly when I asked the seller about the 135AH cells (large, nice looking yellow blocks) and about these; I asked if they are new or used, the seller responded back that the 135AH cells...

You know you are dealing with a technical writer who really knows his audience when most of a page for someone who has built a battery and is installing a BMS (soldering ring connectors, etc.) has this: Thanks Daly. That page was super helpful. :p

Has anyone ordered the 120 AH batteries from XUBA yet? Can you share your experience / capacity test results with me?

Exactly, let's stop scape-goating people in this thread for just reporting their findings. The more data the merrier; it's silly to make it personal. Finding possible issues with a product is not attacking those who found the deal or already bought it. Xuba is a company, not a cult. I think...

So in the past I've had a couple of their older mppt models (metal housing) they worked ok when they worked. Very touchy if you accidentally loose battery power while connection with panels plugged in they would die. I recently bought 3 x new powmr pro 60 amp 12/24/36/48 mppt chargers...

Thanks for checking them out. At those prices I'm thinking maybe I'll order some spares and see how it goes over the year.

I'd recommend you keep it off the grid for now. Just contain your salt water system on the solar off grid setup. I think conceptually this is the easiest and since you already have the panels and are ready to go with a cheap PWM charge controller why not? Do like @Hedges recommends and make...

OK so I bought the 250a version of the Daly Smart BMS. I noticed when I'm charging 10.4 a from my PSU the BMS PC software indicates 11+ amps. Do I need to do the "10 amp calibration" from the "Engineering" menu? I had assumed this was something they would have done in the factory. Sorry for the...