ojeysky:


For starters, what was the actual capacity label on the cells??

120AH

adrusa:


120AH

Ahhha, nigerian importers are to be blamed then, together with useless SON.

Felicity has different lithuim packages on alibaba, 100ah, 125ah, 150ah, 200ah... Yet to even see the 120ah variant, yet they told the manufacturers to slap a 200ah rating on a 120ah product, no wonder its affordable, cos the real 200ah variant is about 490k on alibaba, and the vendors here may likely be buying it at 630k to 650k, so the profit margin is a bit slim for the importer, but in a bid to maximize profit and make a killing, they do this 120ah nonsense...

This is one of the reasons i warned against buying drop in lifepo4 banks from unrecognized sources. They cant try this sh, it in developed countries. A law suit will ensure they go bankrupt

adrusa:


120AH

Thanks for confirming my estimations

Does this mean the people taking out 6kw are doing 100% DoD or the cells are underrated capacity wise per label sticker?

adrusa:


120AH

ceaser:


Oh yes. I forgot that part that you have utility. It implies your system more or less serves as a power back up.

As if the utility guys heard you, it's been unavailable in the last 1 week my panels have tried to keep up; for a "non premium" doing 4x of its name plate. More PV is now inevitable

Practically one must oversize his PV array relative to house loads and battery charging needs.

2x the wattage required to run average house loads + recharge battery fully is a good size to work with.

Considering the lifespan of PV mounted, it is a no brainer to invest in energy generation.

Oversized PV will ensure full charge and easy running even on a cloudy day, on really bad days you can shed loads or supplement with a Gen.

ojeysky:


As if the utility guys heard you, it's been unavailable in the last 1 week my panels have tried to keep up; for a "non premium" doing 4x of its name plate. More PV is now inevitable

NiyiOmoIyunade:
Does this mean the people taking out 6kw are doing 100% DoD or the cells are underrated capacity wise per label sticker?

Is there someone who claim to take out 6kw? If there is then the person was at over 95% capacity. However I have seen people on this thread mention about 110 at a voltage around 3v per cell, that was a clear indication it was 120AH as I earlier explained to you. It's normal for new cells to have about 5 to 10AH more than their name plate on first few cycles, it however doesn't remove the reality of the actual capacity.

NiyiOmoIyunade:
Does this mean the people taking out 6kw are doing 100% DoD or the cells are underrated capacity wise per label sticker?

Lithium batteries are usually slightly underrated by about 5AH. I believe that is why some of the marketers/makers can claim that you can do 100% DoD. So, though this is labelled 120AH, it might be up to 125AH or a little more. Like some people have suggested here you can probably not discharge most batteries to true 100% DoD without irreversible damage except LTO I think.

ojeysky:


Is there someone who claim to take out 6kw? If there is then the person was at over 95% capacity. However I have seen people on this thread mention about 110 at a voltage around 3v person, that was a clear indication it was 120AH as I earlier explained to you. It's normal for new cells to have about 5 to 10AH more than their name plate on first few cycles, it however doesn't remove the reality of the actual capacity.

I needed not have replied, you have answered the question.

I have reports outside the forum and also a few pages back someone said he had taken out 6kw.

Again the Felicity office in Nigeria say it is a 48v 150Ah battery with ~7.5kwh inside.

It is possible Alaba specs are different as I see ads here and outside too.

So perhaps same external form factoe but different content.

@Adrusa - please did you buy off Felicity direct or open market?

ojeysky:


Is there someone who claim to take out 6kw? If there is then the person was at over 95% capacity. However I have seen people on this thread mention about 110 at a voltage around 3v per cell, that was a clear indication it was 120AH as I earlier explained to you. It's normal for new cells to have about 5 to 10AH more than their name plate on first few cycles, it however doesn't remove the reality of the actual capacity.

NiyiOmoIyunade:
I have reports outside the forum and also a few pages back someone said he had taken out 6kw.

Again the Felicity office in Nigeria say it is a 48v 150Ah battery with ~7.5kwh inside.

It is possible Alaba specs are different as I see ads here and outside too.

So perhaps same external form factoe but different content.

@Adrusa - please did you buy off Felicity direct or open market?

Okay I have seen the post, that was the same post that we discussed about which made me suspect it was 120AH cell. That particular user had his inverter cut off at 48+v was similar to @Adrusa cut off voltage. He was able to get juice of over 110+AH
Aside that, unless the cells are significantly unbalance (BMS will have tripped much earlier if that was the case) over 1kwh more will be a lot to expect at 48.5v of lithium.

However the bold could be the case as well but quite unlikely, and it will still be a goof on the side of felicity either way. Our felicity Lifepo4 battery sellers on this thread can perhaps help us unravel this as well

adrusa:
I will see what I can do. I could have taken all those pictures the day I installed the BMS because I brought out the entire thing. As I said, it was really well built. I wish I can get a good welder or iron bender to construct such nice cage for my other DIY.

Nice
I typically take numerous pictures of most things I dismantle; helps troubleshooting in the day of need. Makes for good reference too when something goes wrong with reassembly e.g. one is forced to defer coupling back due to emergencies or other unforeseen situations. Or someone else needs help.

justcallmenuel:
4000watt souer pure sine wave inverter, #115000. Contact us on 08168986461

Please does this inverter have AC charger?

NiyiOmoIyunade:


@Adrusa - please did you buy off Felicity direct or open market?

I bought from an authorised felicity dealer.

Please I need used solar panels from 190w

tunde2014:
Please I need used solar panels from 190w

Contact @saipro if hes still having those yingli.

zeestone99:


Contact @saipro if hes still having those yingli.

thanks

tunde2014:
Please I need used solar panels from 190w

I have about 10pcs
What'sapp 08028074483

tunde2014:
Please I need used solar panels from 190w

6pc used 200w mono panels available in the south south region of the country.

Available for pickup
What'sapp 08028074483

wilmaria14:
Available for pickup
What'sapp 08028074483

make/model, 500ah or 800ah? price?

wilmaria14:
Available for pickup
What'sapp 08028074483

free of charge?

durodee:
free of charge?

na small money

earthrealm:


make/model, 500ah or 800ah? price?

800h 2v 78k

wilmaria14:
Available for pickup
What'sapp 08028074483

78k
800ah 2v

wilmaria14:
800h 2v 78k

What's their condition new or used.

U don change price ok

NiyiOmoIyunade:
I can speak to the complexity of Lithium vs lead acid.

There is so much one needs to get right else a huge investment would go down the drain.

I use a popular and well reviewed battery - PylonTech. You are told you can add new batteries to the bank at will. In reality it is not so straight.

I got my first set of 8 in November 2019 and it was easy peasy until I added the 2nd set of 8 in June 2020. The bottom most battery refused to catch up with the others in charge and discharge and kept throwing over voltage and over temperature alarms. I would have lost that battery had I not gained admin access to the BMS and recalibrated values to allow the module recover and catchup with the others. The cells in that module were not perfectly matched as the others and kept drifting.

Now I added 4 new bricks this October and the BMS software version is higher than the old bricks - the result - combined BMS throttled my maximum charge current to about 300A - 15kw instead of the design 500A/26kw. I am now current limited to 15kw by the battery even though I have a 20kw PV array. I have yet to figure that one out as the BMS tells the Victron chargers what to do per time and if you insert a new value, it just gets overwritten 30 seconds or so later.

The next big myth is discharge rates - you will be told you can run at 1C with no issues - this is true but only within a SoC range e.g 20% to 100% - once you drain battery below 20%, you may find the BMS cutting large loads to protect the circuitry and cells - ditto for charge rates - try filling a 48v 1000Ah battery at 1C and you see cell temperatures jump up fast - this is not good for long term health so in my case I capped my charge current at 0.3C - getting from 20% to 100% within 3 hours on a 48v 1000Ah bank is good enough performance for me.

Really there are many things to consider and get right especially for large systems. I routinely see my BMV 500A shunt running hot when passing like 18kw of energy. I see up to 50degC on shunt and 40degC on bus bars so I am in the market now for 1000A shunt and even thicker bars than I already have. Even my 600A continuous rated Blue Sea Systems DC isolator runs hot when passing 18kw of energy. With the energy density of Lithium, a short or failure in the system could be catastrophic indeed.

On the plus side you get early warning of issues especially if the BMS talks to you. This is one strong advantage over lead acid. Because I can see every detail about every cell with the Texas instruments chip BMS bundled with the Pylons, you can take early corrective action. Again this info is not available plain text, a solid knowledge of cable pinouts, serial/RS485/CANBUS communications and many other esoteric skills are needed to interact with the BMS and adjust operating parameters if required

nice one niyi. at least we finally begin to see some down to earth details popping up far from the glossy narratives
we been hitherto fed with.
your admissions tally completely with what that rod guy was trying to explain in his website while also mentioning
your battery type - pylontech.
when we lay the facts bare for all to see, discerning peeps are able to make informed decisions without feeling
tricked into venturing into something they thought was all frills and thrills.

Epever triron 40amps mppt available

7 battery type selection Sealed(AGM), Gel, Flooded, Lead-acid User, LiFePO4 Lithium, Li(NiCoMn)O2 Lithium, Lithium User(9~34V). Dual 5V DC USB output interface of this mppt controller can charge your electronic devices directly.

Price- 75k

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samnaija:

What's their condition new or used.

used

GeorgeD1:


nice one niyi. at least we finally begin to see some down to earth details popping up far from the glossy narratives
we been hitherto fed with.
your admissions tally completely with what that rod guy was trying to explain in his website while also mentioning
your battery type - pylontech.
when we lay the facts bare for all to see, discerning peeps are able to make informed decisions without feeling
tricked into venturing into something they thought was all frills and thrills.

I actually think it is you who continue to make people feel lithium is some scary and deceptive thing, on reasons best known to you. If it was not better Niyi will not continue to accumulate(for business reasons or otherwise) and those who use it will not share their experiences (good or bad). It's no brainer that lithium is a superior chemistry to LA any day any time but that still doesn't mean that both chemistries won't appeal to us differently. Why you see experience sharing as being trickish is what beats my imagination, isn't that what this thread is about.

In my actual professional world it's over a decade now that operators are being adviced to deploy IPv6 but up till now IPv4 dominates, the difference however is that the number of networks running IPv6 now compared to a decade ago has increased significantly and it's only a matter of time before IPv4 will eventually be obsolete and relegated.

Ultimately the choice remains with each individual to either deploy the present technology with future relevance in mind or be caught unprepared.

Interesting conversations.