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Thats why buying real grade A cells is worth the extra 25%.

I thought the point of a hydraulic controlled mechanism was to keep constant pressure as the cells expand. It keeps a constant 11 psi just like a piece of foam would. Using a rigid system torqued to 11 psi will lead to more pressure as the cells try to expand. I'm not a mechanical engineer but...

Bms smart shunt tracking ah and state of charge via voltage. Appears that my voltage levels are a bit off the real % charge and my cells are probably closer to 300ah capacity instead of 290. Seems like it's working as normal, thanks

Mistakes to learn from

That's good to hear, the series panel are on the same sides. Thanks!

They are both the same technology. But making lead acid batteries is easy peasy, for example like a tortilla. Making a lithium battery is like making a croissant. A lithium has tons of layers and if you mess anything up it ruins the whole thing

You "Should" change the charge controller. You can do a direct swap, but the charge controller will likely only charge the batteries up to 60-70% as lithium requires a higher float voltage. Won't be an issue if you don't use much for power (30-60ah overnight.)

Compress them, then put the bus bars on.

VHB tape is still the best in my opinion. This is what I bought, 5952 is the best for plastic to paint adhesion. Still holding strong after a year. Removal is only through physical means, but I'd rather scrape 3-4 feet of tape with a razor scraper than 8-10sqft of silicon caulking.

You might know this, but lifpo4 batteries have the most amount of cycle life when charged from 35-75% or from 30-85%. Avoid going over 90% unless you really need the power. If your gentle on the batteries they can last 4-10k cycles with 80% remaining capacity. They would still have some usable...

That's what I did. I didn't realize you mean the aluminum sign board. Go heavy on that caulking. I attached my flexibles to sign board with sikaflex, the edges didn't have enough are started to peel away. I had to tape over the solar panel edges to keep them from catching wind while driving.

I went with a 24v system. Cheaper MPPT charge controller, cheaper wiring, cheaper BMS. Inverter cost is the same, and you do need to buy a 12v converter for lights and stuff. 24v @ 100 amps can put out 2400 watts. With a true copper core welding cable you can use 6 AWG for ~2-3 feet. On 12v you...

13.2 on my charge controller means its bulk charging, eg the batteries are at 50-80%. Most lifpos are shipped at 30% charge. That means they need 200ah of charge to be at 100%. If your panels put out their max rated 310 watts, it would take roughly 8 hours. If you use power or have anything...

That'll be the guy who I sell it to's problem :D I think most flexible panel failures are because someone mounted it directly to their roof and just cooked the thing in hot arizona sun

Cells + Shipping + alibaba fee's

I could run an induction cooktop but I'm going propane. I like to cook, and 1500-1800 watts for an inverter ran for 30-45 minutes will use a ton of power. It's pretty easy to run a flexible LPG line from the tank to whatever stove your using. I know a few european countries have unique gas...

TLDR: Us diy'ers are riding the coat tails of power grid storage

Op likely got grade b cells that were rejected. Those cells swell beyond the allowed amount. Compress good, grade a cells that haven't swollen I wouldn't compress swollen cells as you can't undo that damage

Unfortunately it is that simple. If you want genuine, grade A cells from the factory, you buy through Amy or Luyuan Tech. If you want genuine cells at a discount, you buy through Michael via a group buy. Anything else is pure speculation. You might buy from vendor DCX, those cells turn out...

What carrier is the tracking? You need to contact them to confirm that the package was addressed and sent to you. Then try to get them to pull the GPS log of the delivery to see where it was signed at. If all of that checks out, ask for the total weight of the shipment as 8 cells will weigh a...

158 per cell final price for grade a matched

The zooms teardown I saw from wills video showed a proper BMS. The batteries will go into protection mode if they are over charged or under charged. So theoretically you can swap them over without issue, other than potential for a partial charge. The charge center might think the batteries are...

AliExpress might ban you from their services. Eg you can't buy more stuff. Small price to pay though

I want to run an A/C off my 1200 watt solar setup with 560 ah of batteries. A 9000 btu 17 seer mini split a/c unit will use around 650-750 and up to 900 watts A 12000 btu mini split uses an average of 900 with up to 1100. If they are both inverter mini splits, wouldn't they use the same amount...

Amy buys direct from the factory. The factory will produce batteries, then they match them so that all of the internal characteristics are a perfect match. So when you buy 16, 280ah batteries, each one acts exactly the same throughout the entire voltage discharge curve. That means you get the...

Its possible there is a kink in the wire or other damage which is limiting the current

I have 4, 305 watt panels rated at 39.3 volts and 9.9 amps. I'm looking at this all in one unit. The MPPT is rated at 40 amp 105v. Can 2p2s the panels for 80 volts 20 amps so it works with the mppt?

This is what I used https://www.galco.com/buy/Icotek/32760?scrollTo=overview

Doesn't EVE test 1 cell with this machine? I would think that 1 cell in a hydraulic machine with a flat clamping face would have a pretty consistent pressure across the face. Or at least along the parts that are in contact. I remember the report saying over compression is worse than no...

I'm building a large solar system to run a 700watt minisplit a/c in my RV. I've got 1300 watts of solar panels that are 33v 9amp. I'm going to use a 1500 watt 120v inverter to run a fridge and the A/C. My goal is to power the a/c with solar during the peak sun and maybe a few hours at night. I...