Discounted lithium batteries - worth a try?

[MTB Deano]

12V 100Ah LiFePO4 Lithium Battery | Deep Cycle & 10-Year Life

Explore our 12V 100Ah LiFePO4 Batteries: over 3000 cycles, 10-year life & BMS – perfect for your caravan or boat.

uk.eco-worthy.com

I'm looking to go to lithium soon and this just came up on my FB feed, offering a 100Ah lithium battery for £430. Does anyone have any experience of this particular brand? Too good to be true?

 

[Stealaway]

Ooopppps

 

[MisterB]

12V 100Ah LiFePO4 Lithium Battery | Deep Cycle & 10-Year Life

Explore our 12V 100Ah LiFePO4 Batteries: over 3000 cycles, 10-year life & BMS – perfect for your caravan or boat.

uk.eco-worthy.com

I'm looking to go to lithium soon and this just came up on my FB feed, offering a 100Ah lithium battery for £430. Does anyone have any experience of this particular brand? Too good to be true?

Check Fogstar - quite a lot cheaper but still great quality. Do a search on YouTube and you will see someone stripping a Fogstar battery down so you can see how they're made ...

 

[Stealaway]

12V 100Ah LiFePO4 Lithium Battery | Deep Cycle & 10-Year Life

Explore our 12V 100Ah LiFePO4 Batteries: over 3000 cycles, 10-year life & BMS – perfect for your caravan or boat.

uk.eco-worthy.com

I'm looking to go to lithium soon and this just came up on my FB feed, offering a 100Ah lithium battery for £430. Does anyone have any experience of this particular brand? Too good to be true?

They are the one I've been following and they are getting cheaper.
I'm not ready for any batteries yet and I'm still concerned about charging lithium hab batteries
I have the usual large lead acid hab batteries - I have Elektroblock 119 - a sterling B2B - 240 watts of solar panels.
Will they all be OK at charging Lithium hab and a lead acid starter batteries together - correctly?

 

[MTB Deano]

Check Fogstar - quite a lot cheaper but still great quality. Do a search on YouTube and you will see someone stripping a Fogstar battery down so you can see how they're made ...

Thanks MrB, Fogstar Drift is £369 for 105Ah! They're currently on pre-order for March 2023 delivery.

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[MisterB]

Thanks MrB, Fogstar Drift is £369 for 105Ah! They're currently on pre-order for March 2023 delivery.

Theres quite a few if us now with Fogstar batteries. Not heard any adverse comments so far ...

I pushed the boat out and got a 300A (we wanted to be able to use a microwave off grid), have yet to use it in anger yet though ...

 

[MTB Deano]

They are the one I've been following and they are getting cheaper.
I'm not ready for any batteries yet and I'm still concerned about charging lithium hab batteries
I have the usual large lead acid hab batteries - I have Elektroblock 119 - a sterling B2B - 240 watts of solar panels.
Will they all be OK at charging Lithium hab and a lead acid starter batteries together - correctly?

Not my field of expertise I'm afraid but I'm sure someone more knowledgeable will chip in...

 

[DavidCh]

I have just finished building a lithium battery from four 280a cells. Worked out at about 23p a kWh. Certainly much cheaper than any discounted ones and much better built

 

[Al n Val]

I have just finished building a lithium battery from four 280a cells. Worked out at about 23p a kWh. Certainly much cheaper than any discounted ones and much better built

high DavidCh

may I ask what you have used to build this battery, is it 1120ah?

Do you have any help you could offer me and what about a BMS and cost breakdown

cheers

Al

 

[BillyKontiki]

Interesting David where did you buy the cells, and Bms from.

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[MTB Deano]

I have just finished building a lithium battery from four 280a cells. Worked out at about 23p a kWh. Certainly much cheaper than any discounted ones and much better built

Would be good to see some photos and details of your build David ?

 

[DavidCh]

Would be good to see some photos and details of your build David ?

Thread '280a LifePO4 Battery'
https://www.motorhomefun.co.uk/forum/threads/280a-lifepo4-battery.276556/

 

[autorouter]

may I ask what you have used to build this battery, is it 1120ah?

It's four 280Ah cells in series to make one '12V' battery. If one cell is 3.6V 280Ah then the battery is 14.4V 280Ah.

If the cells were wired in parallel, that would give a battery that was 1120Ah, but only 3.6V so no use as a leisure battery.

It's the same energy storage either way. 14.4 x 280 = 4032 watt-hours, 3.6 x 1120 = 4032 watt-hours.

 

[DavidCh]

The really clever bit (in my opinion) is the JK BMS with built in bluetooth. I have fairly comprehensively tested each part of it (apart from the low votlage cutoff) and it has worked flawlessly. Currently its in the van and I have left enough switched on with no charging to fully discharge it. I will let that run until the BMS shuts the discharge of (about 50 hours), then fully charge it again so I will get an actual capacity.

 

[DavidCh]

First full cycle completed and the recorded capacity on the bms was 286ah. Victron said slightly less (284) but did not see the battery as fully discharged so I need to fiddle with the settings.

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[Raul]

Fogstar has a good price on eve 280ah cells, i got 32cells end of December to build two 48v battery banks. Went for JK 200a for each bank. Total, 28kwh just under 5k including bms. I already built my boxes, I’m just waiting for the weather so I can to top balance, I don’t have a heated garage, and best leave it till warm.
Oh and the grade A, comes with double welded terminals, large contact surface, and spec sheet from eve on request. All cells are 291-292ah and above. Avoid studded cells.

 

[Raul]

12V 100Ah LiFePO4 Lithium Battery | Deep Cycle & 10-Year Life

Explore our 12V 100Ah LiFePO4 Batteries: over 3000 cycles, 10-year life & BMS – perfect for your caravan or boat.

uk.eco-worthy.com

I'm looking to go to lithium soon and this just came up on my FB feed, offering a 100Ah lithium battery for £430. Does anyone have any experience of this particular brand? Too good to be true?

Search on YouTube for DC Guy, he did a review on this battery side by side with a fogstar. I would stay away from ecoworthy, quite cheap build, there is better out there for same money or cheaper. Ultramax uses cylindrical cells much better and it’s only 430 for a 100ah.

 

[davidroxburgh]

I went to KS Energy who give a discount. First class service excellent product and good BMS

 

[Raul]

I went to KS Energy who give a discount. First class service excellent product and good BMS

What bms do they use?

 

[davidroxburgh]

Hi Raul
I do not know if they buy one in or not. You can download from AppStore and get some idea. For me the BMS was a great steps forward regardless giving me so much better info about for example how draining the diesel heater was. Actually not so bad. Likewise my Votronic Inverter takes very little juice when on but not driving anything.

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