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MB31 314Ah cells showed up on Nkon.nl today on preorder for delivery end of June. €92 each plus shipping which is €8 more than I recently paid the same vendor for LF304K cells. https://eu.nkon.nl/rechargeable/lifepo4/prismatisch/eve-mb31-prismatic-314ah-lifepo4-3-2v-a-grade.html

According to the second line in the chart of my Google lens translation of this slide from the 2023 “Senior Engineer Lithium Battery Conference” in Guangdong China, (Oct ‘23), down to 0.35-0.38 yuan per Wh ($48-$52.5/kWh) by the end of this year and a modest drop to 0.34-0.36 yuan per Wh ($47...

Very easily and cheaply done with any type of smart home power switching socket adapter. I would use the Tuya range such as this https://expo.tuya.com/mobile/product/1075057 Together with a Tuya lux sensor can be programmed via Smart Life app to switch on only when full sun hits your solar...

Yeah I completely agree and I have no qualms about paralleled cells discharging at slightly different rates then catching up later in the discharge curve, but with potentially a 4X IR mismatch I am thinking the imbalance in this case might be more than just “slightly” different and hence giving...

For batteries of the same or similar IR, it’s considered best practice to diagonally connect load tap offs as shown in option A diagram below, but what is the best approach to manage paralleling of batteries with significantly different IR? I have Lishen 272Ah cells with a spec sheet IR of...

Great work!

It’s watt hours which count, and here in the winter when bulbs can be on 18 hours a day, efficiency improvements really help. But different things are important to different people!

The “best” LED bulb I want is the one isn’t one which looks like an old fashioned bulb, it’s one which will be most efficient. I keep replacing my bulbs at home, each time ikea LED lamps evolve into a more efficient variety. 1.8W for 250 lumens ikea “solhetta” is about the best right now but one...

I just pressed the button on 8x LF304 from Nkon.nl, since they’ve dropped their price on preorders even further during the past month since I last checked. Now down to €84.95 per cell on 8 cell quantity with busbars, only a couple of euro more than the LF280k v3. I went with the bank transfer...

Yes it’s an option. I could reconfigure my main battery bank to 8S, but then I have to replace my 12V inverters or I could use a suitably sized Buck boost module to just raise the transmission line voltage then convert down again, local to my loads, but all these converters have a quiescent...

It’s a nominal 12V (4S LiFePO4) system.

Reading the spec sheets for each tells you this. The 280Ah cell is rated for a longer life at a lower charge and discharge rate and is therefore the best pick for home energy storage imho

Those spam guys really helped us out!! 😁

I also think that after this year’s price dip, the longer term factors will drive prices back upwards. Timing a purchase decision correctly will be a good trick to pull off.

They should make it smaller. They’d sell more (y) 😅

Thank you Rickey. I do not understand what the RS-485 link port is used to connect to? RS-485 communication to what? If a KH machine can only connect to a single display, why did you previously write the below in response to my question about whether I could add a second display?

If people are brave enough to post details of their accident for others to learn from, I think they deserve that comments are moderate in tone and not disrespectful, otherwise how likely are others in the future to keep their failures off the boards, instead of risking it? Forum moderators...

I checked their shipping rate to Europe and to me in Sweden, 8 cells comes out to $76.64/each, but that does include their cheeky 4.4% credit card payment surcharge, as I wouldn’t order a product like this without the backup of a credit card chargeback in case what showed up was junk product.

No comment! 😂

There’s really a price crash ongoing this year then. I wonder where the bottom will be found? It also must be challenging times for the resellers when the value of the stock they hold is continually declining. You would surely end up having to sell at less than you purchased for, since they...

I don’t know if it’s symptomatic of the race to the bottom in lifepo4 cell prices this year, or just rogue sellers listing vapour products at tempting prices, but I’m seeing 280Ah cells approaching the $50 mark on Alibaba now. Such as...

Was this wire passing through a hole in the metal frame at a point where the wood shelf would have been above, pressing down on the wire on the far side? If the wiring was routed in this way with pressure on the cabling from the shelves it would compress the insulation and over time with some...

Are the Envision 305s a wet cell like Eve, or one where the Electrolyte will not be heard sloshing around if they are tipped?

Thanks for doing that test, it’s an interesting result. I have given up the idea of buying a second display for now as the info from Junctek factory store on AliExpress is contradictory and confusing. First after I asked to buy a 2nd display they said only one display can be connected to the...

I’m constantly impressed by the quality of the info available here and the patience many people have in answering the questions of others. Long may it continue!

It’s better because it’s more efficient. And efficiency is important to me, as I’m not living somewhere where I have sufficient solar to run on solar year round. If I were, I could shed watts without worrying about it, but when I run 4 months a year with my house fully back on utility mains...

I have my offgrid system set up to charge my main battery bank, which then distributes DC power to remote loads via (fuse protected) cabling around my home, as well as via offgrid inverters connected close to the battery for mains powered loads. Where possible I run loads on DC and seek to...

It’s hard to say as my only other reference to compare against is the 3D brothers Electrodacus, which I know is inaccurate. I assume the Junctek is accurate but that’s the best I can say as I’ve not verified it. Better to live in happy ignorance and trust those numbers on the display! 😁...

I asked Junctek Factory Store on AliExpress how I can buy a second monitor for my KH160F. They replied “亲爱的朋友，一台KH只能用一个显示屏显示。Dear friends, one KH can only be displayed on one screen.” So @Rickey if the KH series can really connect to 2 monitors like you said above, you should probably inform...

This is very good for us (collective us who dabble in home energy storage) - I will sit back and plan to double my storage capacity at home by the end of this year.

I’m still curious about how a second display may be added to the KH160F. I see on the main unit “RS-485 display“ and “RS-485 link” connectors. Is it enough to just buy a second display and connect to “RS-485 link” on the main unit, or is some setup required? @Rickey can you please confirm...

I guess you mean May 2024? I hope you offer it for sale as host computer unit only, so users who already bought a battery monitor and have a shunt and display unit can upgrade their system just by buying the new wifi main unit.

How can a user buy a second monitor display for KH series? I looked at all listings on AliExpress “Junctek factory store” but didn’t find any listing which was display only?

Ok thanks. Makes you wonder how (if) these products get tested before firmware is released.

Any chance of a quick summary explanation please, so we don’t all have to watch the video?