ojeysky:


It's really a pain, I think I am going to start buying my parts in multiple pairs so whenever DIY users needs something I have they can get it faster, I hope other DIY LFP users can do the same. So instead of ordering a single BMS from AliExpress, order 2 or 3, that way someone who can't wait for AliExpress can pick it off you at a reasonable price margin.

I did same, bought BMS for both 24v and 48v, so I won't be stuck if I need to go to either system.

mctfopt:


I did same, bought BMS for both 24v and 48v, so I won't be stuck if I need to go to either system.

So which one is currently in active service? If it's the 48v, can you sell the 24v to me while you place another order (since it's for backup)?

ojeysky:


So which one is currently in active service? If it's the 48v, can you sell the 24v to me while you place another order (since it's for backup)?

You should always have a spare BMS on ground. The major weakness of our "DIY" LFP is the BMS. When they go out, your battery becomes a paperweight until you can get a replacement. If I have an extra, I won't sell it. I will only sell if I have at least two extras.

By the way, when the BMS in the expensive LFP like Pylontech goes out, what options are options are opened?

Hi Essegis,

Can you kindly give an idea of the shipping cost to Nigeria of the G1 Nissan Leaf module pack unbundled? Thank you

essegis:


Even for top balancing I will still have to parallel them. Only difference will be a charge would be applied to them as against discharge when it's bottom balancing.

As for the cells they are rated at 66AH, 500WH. But these cells are not new and they being used initially in an electric car one does not know the condition they are coming with. Though seller sold at 65% capacity and a lot of folks have been getting that or higher.

I don't know what you mean by significant storage as they are not brand new. I ended up buying 57 modules though at an overall price of just above $2000 (a full pack containing 48 modules then 9 extra).....the shipping cost a arm and a leg sha oo. Planning to set them up in 14s for a 48v system and yes I won't have to go digging too much before I can get inverters that will work within the sweet spot voltages of this system. They are compatible with most inverters out there.

mctfopt:



Freight forwarders or the good old FedEx and DHL

Freight forwarders oo. Leave all those thieving DHL and FedEx alone abeg.

teamman:
Hi Essegis,

Can you kindly give an idea of the shipping cost to Nigeria of the G1 Nissan Leaf module pack unbundled? Thank you

Pack cost me 265k to ship down. They were not unbundled though so I cannot give the price for unbundled.

essegis:


Pack cost me 265k to ship down. They were not unbundled though so I cannot give the price for unbundled.

What's the total weight or approximate weight of the shipment?

essegis:


My brother na really adventure oo. I actually bought 3 types of batteries after watching a lot of YouTube on set ups and performance.

1.) 57 modules of Nissan Leaf
2.) 6 packs of BYD batteries
3.) 100 cells of 38120 LFP

Wow! Those are quite heavy power.

ojeysky:


What's the total weight or approximate weight of the shipment?

You know shipment is done mainly with size than with weight, but I've always known this pack would be heavy. Even the way Big Battery handled it showed it had some weight to it. They didn't use the conventional way to move it to my couriers. Also sure it was crated to which will add to the size.

Anyway, see a grabbed part of the invoice. Showed weight and dimew.

ojeysky:


What's the total weight or approximate weight of the shipment?

You know shipment is done mainly with size than with weight, but I've always known this pack would be heavy. Even the way Big Battery handled it showed it had some weight to it. They didn't use the conventional way to move it to my couriers. Also sure it was crated to which will add to the size.

Anyway, see a grabbed part of the invoice. Showed weight and dimensions.

essegis:


You know shipment is done mainly with size than with weight, but I've always known this pack would be heavy. Even the way Big Battery handled it showed it had some weight to it. They didn't use the conventional way to move it to my couriers. Also sure it was crated to which will add to the size.

Anyway, see a grabbed part of the invoice. Showed weight and dimensions.

Oh okay it was a sea freight, almost 200kg wow! But ultimately it's not a bad deal at all. This would have taken up to 3 months right?

ewizard1:


Wow! Those are quite heavy power.

Baba, as you just talk am now I am forced to agree with you oo. But they are used and I saw them as a deal that's why I went in like that. Also, I had not come across this platform by then.

There is also a Nigerian YouTube channel I follow that helped buy me over to the Nissan Leaf batteries called AWPS I think. No be you get am?

ojeysky:


Oh okay it was a sea freight, almost 200kg wow! But ultimately it's not a bad deal at all. This would have taken up to 3 months right?

Invoice sent March 23rd. I sure e for don reach if no be for uncle Coro.

essegis:


Baba, as you just talk am now I am forced to agree with you oo. But they are used and I saw them as a deal that's why I went in like that. Also, I had not come across this platform by then.

There is also a Nigerian YouTube channel I follow that helped buy me over to the Nissan Leaf batteries called AWPS I think. No be you get am?

Yeah, I know AWPS, he has some nice setups too. I have been following Lithium for quite a while and I know what those things are capable of.

Even as been used, they can make brand new Lead Acid batteries look dumb . I also use a DIY 18650 battery setup coupled from cells from dead laptop batteries. Apart from the time trouble to gather the rigth number of cells, it has been fun building those things. Even if I don't know about the BYD, I know Headway is a crazy cell.

I read a post someone said, 18650 builders have gotten burnt someway, I just laugh because I dont know about that. Apart from the high number of wastage when gathering those cells as you might end up with low cap cells which would not pass to be used, there's nothing I regretted about it. The trick is "know what you're doing"

Since I started using my Lithium ion around July 2019, it's been running without a BMS an I have nothing to worry about because I knew what I did there. Even though I later got a Daly BMS from AE, I still didn't bother installing it. Already getting set on my 48v setup.

ewizard1:

"
Since I started using my Lithium ion around July 2019, it's been running without a BMS an I have nothing to worry about because I knew what I did there. Even though I later got a Daly BMS from AE, I still didn't bother installing it. Already getting set on my 48v setup.

What's the specs and are you willing to sell?

ojeysky:


What's the specs and are you willing to sell?

24V 45A Li-ion. Not selling.

ewizard1:


Even as been used, they can make brand new Lead Acid batteries look dumb . I also use a DIY 18650 battery setup coupled from cells from dead laptop batteries. Apart from the time trouble to gather the rigth number of cells, it has been fun building those things. Even if I don't know about the BYD, I know Headway is a crazy cell.

Since you know much about headway will a 200ah set up carry a freezer? I don't mind turning off the freezer at night while I run security lights.

See specs of freezer below......essentially 766kwh/yr

ojeysky:


So which one is currently in active service? If it's the 48v, can you sell the 24v to me while you place another order (since it's for backup)?

24v in service

ewizard1:

24V 45A Li-ion. Not selling.

mctfopt:


24v in service

Okay, fingers crossed on post office then opening up fully then. Thanks folks

essegis:


Since you know much about headway will a 200ah set up carry a freezer? I don't mind turning off the freezer at night while I run security lights.

See specs of freezer below......essentially 766kwh/yr

766kwh/year is approximately 88w which is not bad for a freezer, and 200ah @12v is 2.4kwh which theoretically translates to 27hours if you are running only the freezer, but in reality, you will get fewer hours due to losses in conversion efficiency, pf of the inverter, battery efficiency, etc

essegis:


Pack cost me 265k to ship down. They were not unbundled though so I cannot give the price for unbundled.

Shipping via sea would've been cheaper but it will take time. But since time=money the expense is worth it


Edit: didn't see the attached image, stuff did weigh like almost 190kg and it was shipped via sea! But some freight forwarder in China (if the goods are in China) would've done it cheaper but it will waste time.

essegis:


Since you know much about headway will a 200ah set up carry a freezer? I don't mind turning off the freezer at night while I run security lights.

See specs of freezer below......essentially 766kwh/yr

Bros why you dey downgrade LFP na ..... freezer is minor na
I currently have 200Ah, apart from lightings, TV etc, my fridge is on it 24/7, my freezer comes on at 9am and go off at 5pm, AC with similar setup but ofcourse these all depends on how much power you generate daily.

mctfopt:



766kwh/year is approximately 88w which is not bad for a freezer, and 200ah @12v is 2.4kwh which theoretically translates to 27hours if you are running only the freezer, but in reality, you will get fewer hours due to losses in conversion efficiency, pf of the inverter, battery efficiency, etc

Thanks.....this calculation just blew me away. I'm definitely hooking it up to the 38120 cells now.

ojeysky:


Bros why you dey downgrade LFP na ..... freezer is minor na
I currently have 200Ah, apart from lightings, TV etc, my fridge is on it 24/7, my freezer comes on at 9am and go off at 5pm, AC with similar setup but ofcourse these all depends on how much power you generate daily.

Hmmmm, the way una dey call this Lithium ehn. I pray I enjoy it too oo.

I need a little explanation from you though regarding C rates, both charging and discharging. I see you mention it in some of your other posts. Can you help me expantiate please.

ojeysky:


Bros why you dey downgrade LFP na ..... freezer is minor na
I currently have 200Ah, apart from lightings, TV etc, my fridge is on it 24/7, my freezer comes on at 9am and go off at 5pm, AC with similar setup but ofcourse these all depends on how much power you generate daily.

Have you experience PV freeze or PV dropout with your GK inverter? Saw a South African thread where people are complaining of this.

Freeze - no output from solar charge controller until manual reset or the following day.
Dropout - momentary lowering of solar output as large load is turned on or off.

essegis:


Hmmmm, the way una dey call this Lithium ehn. I pray I enjoy it too oo.

I need a little explanation from you though regarding C rates, both charging and discharging. I see you mention it in some of your other posts. Can you help me expantiate please.

C rates are rates at which you charge or discharge your battery. The C is the cell capacity, in your case I think yours is 196AH, as an example, 0.5C means that you can charge your cells at 98A, 0.2 means you can charge at 39A etc.

The charge/discharge ratings of cells varies, most lithiums supports up to 1C charge rates while there are those that supports more but I have not seen one with over 2C charge, same with discharge rates but I have seen C rates as high as 6C.

mank1234:


Have you experience PV freeze or PV dropout with your GK inverter? Saw a South African thread where people are complaining of this.

Freeze - no output from solar charge controller until manual reset or the following day.
Dropout - momentary lowering of solar output as large load is turned on or off.

I did not experience that at all

ojeysky:


I did not experience that at all

OK. What did you use as your bulk and float voltage settings with your Lithium battery?

mank1234:


OK. What did you use as your bulk and float voltage settings with your Lithium battery?

28.2/27.2 (using 28.2v as a work around for the early float bug otherwise I will have stayed at 27.6v) am currently using felicity though until my GK comes back alive

ojeysky:


28.2/27.2 (using 28.2v as a work around for the early float bug otherwise I will have stayed at 27.6v) am currently using felicity though until my GK comes back alive

Thanks for your feedback.

ojeysky:


C rates are rates at which you charge or discharge your battery. The C is the cell capacity, in your case I think yours is 196AH, as an example, 0.5C means that you can charge your cells at 98A, 0.2 means you can charge at 39A etc.

The charge/discharge ratings of cells varies, most lithiums supports up to 1C charge rates while there are those that supports more but I have not seen one with over 2C charge, same with discharge rates but I have seen C rates as high as 6C.

Thanks for the explanation. Meaning for me to charge this pack at 1C rate I must be ready to pump in 196A of current into it.

Ewo!!!! Where I wan see am from?

essegis:


Thanks for the explanation. Meaning for me to charge this pack at 1C rate I must be ready to pump in 196A of current into it.

Ewo!!!! Where I wan see am from?

Hahahaha..... Lol but it should be possible to do 0.2 to 0.5C, the higher you are able to deliver the faster you achieve full capacity.

That said, I personally won't go beyond 0.5C even if I have the means; doing 1C charging consistently may eventually tell on the battery life span. On my cell specs a 1C is called a fast charge while up to 0.5C is called a standard/normal charge. I prefer the normal