ojeysky:


Oh this is even massive than I thought (think I saw 300AH in one of your post). You made my point about C rates, what's the essence of a high C rate then.... paying for high C rate in such scenario will be unnecessary

High C rates are very useful in automobile and grid stability applications. It is of no use in home solar storage. I did not buy LTO for it's high C rate. I bought it for it's very long cycle life and abuse tolerance.

essegis:


Man, the consumption here is off the chart. Probably you put everything into one system. Remember that my design? Once I did all the plus and minus and balanced it as I can the battery never leaves float oo, & na ordinary 15kwh. To the extent my CC no dey gree overwork the panels to charge am.

Thats why I no dey post solar panel draw like Ojeysky here oo dey shout panel power. Me sef is shaming of my system

Bros you know say me na smali bank/power I get na hin make I dey loud ham occasionally. People like you, niyiOmoIyunade, dapsyra and co are heavy lifters so those hervest of mine are chikini to you. I no envy Una o....else many organs go loss

dapsyra:


I have the pouch cells. They are 55Ah, 2.4v nominal each. Those cylindrical cells are about 10Ah

Those pouch packs some punch in terms of discharge rates. How has the experience been so far?

mctfopt:


Those pouch packs some punch in terms of discharge rates. How has the experience been so far?

They sure do. Standard charge/discharge rate is 10C with bursts over 50C

I cannot comment on their performance under extreme charge/discharge rates since I have not been able to load them beyond 0.14C. My experience with them has been nothing but pleasant. They have lived up to their reputations

We're always available at your service!

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dapsyra:


They sure do. Standard charge/discharge rate is 10C with bursts over 50C

I cannot comment on their performance under extreme charge/discharge rates since I have not been able to load them beyond 0.14C. My experience with them has been nothing but pleasant. They have lived up to their reputations

Thought I'm the only low C discharge person. Good to see others take it easy on their batteries.

Evening house. Can I get a quote for Felicity 5kva hybrid inverter FL-IVCM-5048? Who has the datasheet for this inverter? @Ojesky once used the 24v equivalent, what is your experience like please? Thanks.

Boss na u dey ball o.

Only the lean arrays can do their peak power - imagine me seeing 21kw instantaneous yield on a 19.5kw array. I go run o.

Also undesirable because I would be maxing out the PylonTech's charge current limit of 400A @ 53.2v - I am voltage limiting to 52.5v in my setup

My max observation was like 15kw sustained yield when the sun broke through for a while on a cloudy day - you guys seeing regularly in excess of name plate either have very very good panels or false labels (under rated nameplate) or measurement bias. Either way you got a solid deal on the panels you use.

ojeysky:


Bros you know say me na smali bank/power I get na hin make I dey loud ham occasionally. People like you, niyiOmoIyunade, dapsyra and co are heavy lifters so those hervest of mine are chikini to you. I no envy Una o....else many organs go loss

NiyiOmoIyunade:
Boss na u dey ball o.

Only the lean arrays can do their peak power - imagine me seeing 21kw instantaneous yield on a 19.5kw array. I go run o.

Also undesirable because I would be maxing out the PylonTech's charge current limit of 400A @ 53.2v - I am voltage limiting to 52.5v in my setup

My max observation was like 15kw sustained yield when the sun broke through for a while on a cloudy day - you guys seeing regularly in excess of name plate either have very very good panels or false labels (under rated nameplate) or measurement bias. Either way you got a solid deal on the panels you use.

Even me I go pick race o, I have never seen power hervest beyond my name plate, but it's always close. Like today I saw 2.3kw on my 2.5kw array. However occasionally, I do get current above name plate, like today it did 10.2A peak for a panel rated 9.8 max. Readings were confirmed not scewed (we both use emoncms) by comparing figures with the one on MPP.

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dapsyra:


You can say that again. Shipping and Customs duty were responsible for half the cost.

The battery bank is located in a very tight area of my power room, so getting good snapshots is very difficult.

Chai... Na wa. Naija!

On another note, Will Prowse did a capacity test on these things and found the cylindrical ones to no have true capacity unlike the prismatic ones you got. And he said round-trip efficiency is about 85-90%. How were you able to achieve 99% efficiency with yours?

dapsyra:


I have the pouch cells. They are 55Ah, 2.4v nominal each. Those cylindrical cells are about 10Ah

Idea of price sir? And shop link.

dapsyra:


From my personal experience running LTO batteries at very low "C" rates, the cycle efficiency is about 99.9%. For comparison, the cycle efficiency of Lead Acid battery is about 70%

My bank is 700Ah and the highest instantaneous load it has ever seen is 100Ah. That is 0.14C on a battery that is capable of 10C

At 55Ah/2.4v per cell, thats quite a lot of batteries.

Oya oh. Who go order bulk LTO make we tag along oh. Oga NiyiOmolyunade coman buy LTO na, abeg.

Trippledots:


Chai... Na wa. Naija!

On another note, Will Prowse did a capacity test on these things and found the cylindrical ones to no have true capacity unlike the prismatic ones you got. And he said round-trip efficiency is about 85-90%. How were you able to achieve 99% efficiency with yours?

The ones Will Prowse tested are Chinese knock-offs. Mine were made in Japan by Toshiba for Honda. They were built to the highest international standards.

Trippledots:


Idea of price sir? And shop link.

I have no idea what the current price is. They are not regular stock.

We purchase them over three years ago when prices of Lithium batteries was not as affordable as it is today though we struck a very good deal because of the volume purchased.

Pls is anyone aware of any gadget that prevents DOD (Depth of Discharge) from going below a specific set percentage level

dapsyra:


I have no idea what the current price is. They are not regular stock.

We purchase them over three years ago when prices of Lithium batteries was not as affordable as it is today though we struck a very good deal because of the volume purchased.

Do you mean these ones?
https://www.ebay.com/itm/Lot-of-18-LTO-Titanate-Li-ion-20Ah-1-1kWh-24cell-SCiB-cells/223465807026?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D26f6ca9f961f4a0b874e1aec4c369998%26pid%3D100675%26rk%3D2%26rkt%3D15%26mehot%3Dnone%26sd%3D202844717477%26itm%3D223465807026%26pmt%3D1%26noa%3D1%26pg%3D2380057%26brand%3DToshiba&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A2b5b5261-cbdc-11ea-bded-923538c86e63%7Cparentrq%3A74fe8fdb1730a4d6b160cb43fff28418%7Ciid%3A1

Peterlove11:
Good morning House....I discovered my battery(luminous 220v) doesn't perform well under high current charging, which resulted to greatly reduced runtimes. Called the installer couldn't profer a solution until by instinct I reduced the default charging current and gbam the battery started performing like when I bought them. Has anybody experienced this

I was banned from the forum after posting this. Has anybody experienced what I described above

Peterlove11:
Good morning House....I discovered my battery(luminous 220v) doesn't perform well under high current charging, which resulted to greatly reduced runtimes. Called the installer couldn't profer a solution until by instinct I reduced the default charging current and gbam the battery started performing like when I bought them. Has anybody experienced this

What was the charging current and what type of battery is your battery? Lead acid or lithium battery? What is your battery capacity?

dapsyra:


From my personal experience running LTO batteries at very low "C" rates, the cycle efficiency is about 99.9%. For comparison, the cycle efficiency of Lead Acid battery is about 70%

My bank is 700Ah and the highest instantaneous load it has ever seen is 100Ah. That is 0.14C on a battery that is capable of 10C

700ah LTO bank. Even 700ah LFP still costs an arm let alone LTO.

Ahn Ahn! Did you you sell one kidney ni?

Trippledots:


At 55Ah/2.4v per cell, thats quite a lot of batteries.

Oya oh. Who go order bulk LTO make we tag along oh. Oga NiyiOmolyunade coman buy LTO na, abeg.

Oga Niyi probably never even get to resolution stage of use with his massive PylonTech LFP, you wan make him jump to LTO

incogni2o:
Pls is anyone aware of any gadget that prevents DOD (Depth of Discharge) from going below a specific set percentage level

yeah, it has been posted here b4, as well.. search on aliexpress...LVD.... the one i saw was for 12v setup. it disconnects the battery from ny load, if the battery voltage hits a preset value....

am leanng towards it for my autonomous water submersible pump project. so sumo puump ill only come on when battery voltage is above 13v, in conjuction with a timer switch.
HOPE I WONT GET BANNED AGAIN FOR THIS.. type aliexpress inbetween the dots

https://www..com/item/4000311757445.html?spm=a2g0s.8937460.0.0.30562e0eJSDkcE

earthrealm:


yeah, it has been posted here b4, as well.. search on aliexpress...LVD.... the one i saw was for 12v setup. it disconnects the battery from ny load, if the battery voltage hits a preset value....

am leanng towards it for my autonomous water submersible pump project. so sumo puump ill only come on when battery voltage is above 13v, in conjuction with a timer switch.
HOPE I WONT GET BANNED AGAIN FOR THIS.. type aliexpress inbetween the dots

https://www..com/item/4000311757445.html?spm=a2g0s.8937460.0.0.30562e0eJSDkcE

Thanks Bro, seen it on the chinese sites.

Was just thinking if I could get similar at Alaba or Arena.

essegis:


Do you mean these ones?
https://www.ebay.com/itm/Lot-of-18-LTO-Titanate-Li-ion-20Ah-1-1kWh-24cell-SCiB-cells/223465807026?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D26f6ca9f961f4a0b874e1aec4c369998%26pid%3D100675%26rk%3D2%26rkt%3D15%26mehot%3Dnone%26sd%3D202844717477%26itm%3D223465807026%26pmt%3D1%26noa%3D1%26pg%3D2380057%26brand%3DToshiba&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A2b5b5261-cbdc-11ea-bded-923538c86e63%7Cparentrq%3A74fe8fdb1730a4d6b160cb43fff28418%7Ciid%3A1

We bought some of those ones after mopping up all the 55Ah cells we could find. They are fully built modules made from 20Ah cells. I still have two or three leftover modules for sale.

dapsyra:


We bought some of those ones after mopping up all the 55Ah cells we could find. They are fully built modules made from 20Ah cells. I still have two or three leftover modules for sale.

Pls click my whatsapp siggy lets talk. Where aee you located?

dapsyra:


We bought some of those ones after mopping up all the 55Ah cells we could find. They are fully built modules made from 20Ah cells. I still have two or three leftover modules for sale.

They LTO?
What's the specs of each module (voltage, total capacity)?

Volunteer your contact details bro.

ceaser:


They LTO?
What's the specs of each module (voltage, total capacity)?

Volunteer your contact details bro.

Each module consist of 24pcs of 2.3v 20AH cells arranged in 2 rows of 12 cells each.
1.1Kwh total, 550wh each section of 12 cells.

Voltage ranges for each row of 12 cells.
32.4V Maximum
27.6V Nominal
18V Minimum

Both rows can be wired in series for 20AH, 55.2V nominal
OR
Wired in parallel for 40AH, 27.6V nominal

o8o five five 35 six four 9 five

dapsyra:


We bought some of those ones after mopping up all the 55Ah cells we could find. They are fully built modules made from 20Ah cells. I still have two or three leftover modules for sale.

How were you able to convert these to a 48v system?

I will still be on the look out for the 55AH modules. If I get them I will share them here too.

essegis:


How were you able to convert these to a 48v system?

I will still be on the look out for the 55AH modules. If I get them I will share them here too.

We arranged the cells into 22S to achieve 52.8v nominal