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Will appears to use something similar in this battery build. I weigh the same as a 48v 300ah battery. I think I'll stress test the crate by leaping on it a few times.

About to build my first 48v 300ah battery. I was thinking of buying a Seplos or Luyuan metal rack case and DIY kit when walking around Costco I saw this heavy duty plastic crate...

Docan have sent me a screen shot of their $99 Catl 280ah showing capacity of almost 300ah. Has any one received and capacity tested Catl 302ah or Eve 304ah? Docan don't have these bigger cells in stock.

Did you apply via UK Network Power? If you did how long did it take for you to get a response? Do you need to do a G99? An inverter of 3.68kW can be installed and a G98 completed after installation. Maximum export should be limited to 3.68kW using a G100 device. The only reason you would a G99...

I believe you have to set battery type as AGM and then enter voltages, even though you've got Lithium

The only thing going for the Seplos BMS is communication, but Andy is unsure how good that is. This is version one and will improve in the future, maybe they also come out with a better balancing solution on the BMS. The inability to shut down the battery is a concern. It does look very neat...

Taking a bit of a risk, but going to buy a Sunsynk 8kW inverter before G99 approval. Seen a good deal. Been a couple of weeks since I submitted to UK Power Networks. Had one email acknowledging receipt, that's it. Do they generally approve stuff?

I've found all the sellers I've approached on Alibaba very responsive via chat. I wonder why there is a price differential between the Catl 302ah and the Eve 304ah?

Do the 200ah Seplos and JK have the same form factor? I really like the Seplos battery DIY kit, but would prefer a JK with 2A balancing and Bluetooth. I think Seplos would sell me the kit without a BMS. Would the JK ports, on off switch, LCD screen fit the Seplos case?

I'm about to make my first Alibaba purchase. I intend using PayPal to pay. I have done an extensive web search re UK section 75 credit card chargeback protection, but everything says you may or may not be covered for Alibaba purchases. "May" does not fill me with confidence. With PayPal I have...

I need to order my first 16 cells from Alibaba. Qishou have offered me Eve 280ah $113, Eve 304ah $123 and Catl 302ah $110 all shipped from China. As a novice I need guidance on what to go for. Qishou says all cells are capacity tested. I've read numerous threads, but still haven't managed to...

Maybe an Automaker, like us, noticed inconsistencies between cells and rejected or cancelled an order.

Has anyone bought the same B grade 280ah batteries from Luyuan? I chatted with Amy after noticing the spec sheets for the real A grade was the same as the B grade. She said the only difference was the self discharge rate. I then told her I needed to occasionally discharge 160ah 0.6C to meet the...

There is a very detail discussion on Deye, Sunsync, Solar Ark grounding in UPS mode in this thread https://diysolarforum.com/threads/how-does-your-inverter-deal-with-ground.17138/post-586281

The above discussion shows why so many users and installers are uncertain as to the correct grounding procedure. My impression is a significant number of Deye derived inverters are installed with just the earth cable connected to the chassis which feeds into the grid earth, leaving no earth when...

When the Deye cuts off from grid and goes in to island mode regs say it must disconnect from the DNO electricity suppliers earth. The DNO does not want any outside current flowing into what it believes is a dead system which it's workers may be fixing. What I find strange that Deye do not have...

Keith the CEO of Sunsynk has posted a few videos on earth neutral bond when disconnected from the grid. I've linked them below. My understanding is RCDs won't work if there is no earth neutral bond and you become the earthing rod if there is a problem. I'm a novice so I might be talking...

I'm based in the UK and about to pull the trigger on a Sunsynk (Deye) 8kW and think I will go for the for the Seplos kit and getting the batteries from Amy at Luyuan. I will occasionally discharge the 280ah batteries at 160ah, to get to the full 8kW. Do Seplos ask you to specify which BMS is...

When Deye, Sunsynk inverters disconnect from grid and the signal islanding mode has been selected an output is sent to two contacts to which a user supplied relay can be connected. Neutral and ground wires are connected to the relay and a ground neutral bond is created when activated. When grid...

The JK is also $100 cheaper.

I understand. The most common communication protocol appears to be Pylontech. I guess the parameters set by a manufacturer in a protocol would be designed to ensure against warranty claims. It would be in its interest to set charging / discharging currents low and maximum/minimum level of charge...

I am going through the same process. I am deciding between Luyuan kit and the Seplos kit with communicating BMS, but no balancing. Amy says everything you need is in the kit except the BMS and cells. This shows the Seplos kit being built: . I spoke to them about the poor packaging, they sent me...

Thank you. The only reason I can see you'd pick the Seplos is communication, the JK appears superior in all other respects. I guess I'm asking how important communication is for Deye / Sunsynk inverters?

Building my first battery, 48v 280AH. I am connecting it to a Sunsynk 8kW hybrid inverter. Which BMS should I pick, a Seplos with communication,but no balancing or a JK with 2A balancing, but no communication?

Thank you that's really handy, I'll have look for something that matches my set up. No PV, just batteries.

This post is very helpful. I have received many quotes for rack batteries from Alibaba and was about to buy 3 48v 100ah for $3000 plus postage. I then thought I have no control over the cell grade and repairs may be difficult. I decided to get some quotes from recommended suppliers. 16 280ah...

My experience phoning up UK Power Networks was vastly different. Wasn't passed through to an engineer, but dealt with by call centre who rather than admitting they hadn't a clue attempted to bluff their way through, which ended hindering rather than helping. The schematic for Western Power, was...

Just looked at A3 form, not as simple as I thought.

Will I need a plan at any stage?

Just stuck in my G99 A1-A following your guidance, only took me ten minutes to fill in. I had two inverters in mind either a Sunsynk 5kW and 8kW, couldn't make up my mind so just put both down on the form. They are both G99 certified. If they approve both then great, if not I'll just amend and...

Many thanks, Deye/Sunsynk seem to be just what I need. Found a discussion elsewhere on these inverters. The 5kW version can pull 35A 8kW with 5kw from battery and 3kW from grid. The 8kW version can pull 50A 12kW with 8kW from battery and 4kW from grid. As you say load is pulled from battery and...

Thank you, just got detailed response from Growatt, calling it 6000 is a bit misleading. They also stated it doesn't have an auto AC bypass on overload. The Deye 8kW looks a better bet for me.

I've been offered a Growatt SPH6000 for a reasonable price in the UK, but wanting to buy cheap Chinese batteries and reading this thread is making me think it's not worth the risk. I have asked Seplos for a quote. I also see the spec sheet says the SPH6000 has maximum battery charge / discharge...

Looking at spec sheet for the Growatt SPH6000 which is rated 6kW it states maximum battery charge discharge 3000w. Does this mean battery can only provide 3kW to a 6kW load? If it does I came close to making a big mistake as my intention was to power the whole house from battery at peak time.