₦airaland Forum

mctfopt:
Cool. The LTO looks so good when connected

O'boy see the bus bars on those cells....chai!

pcoolioz:
Hello All, So I have a quick question.
I am not so experienced with inverters and all so my question might be basic to some of you.
From my research, I read deep cycle batteries get bad when you use below 50 percent of its power consistently and when you overcharge.
I have a solar panel so my inverter is hardly ever dead or I hardly get to 50%, but how about overcharging?
Does the solar panel constantly charging it everyday damage the battery still?
The inverter is hybrid so it stops charging when the battery is full. So my problem is will the everyday usage affect it somehow?

That is my question.

So long as your CC is able to stop charging when your battery is full. Normally lead acid are better charged at .1C so if your solar is charging at that rate or a little bit higher, you should be fine.

It's usually nice to see the short period peaks on a sunny day during raining season

obinna37:
yes I have done that, no current exist

And no difference in the battery voltage between when it's off-load and when the inverter has AC input? If yes then you may indeed have a faulty inverter. I once had a 1.5kva inverter, it stopped indicating the charge icon but it still charges the batteries.

obinna37:
when you on the power outlet,the inverter will power on,it will supply light to the house

Okay, do you notice any difference in battery voltage once the inverter is powered on? Do you have a clamp meter to check if any form of current exists between the inverter and the battery? In/out

obinna37:
Good evening my oga's,my luminous inverter ion,is supplying current, but isn't charging my batteries, what's should be the problem.

Hmm... how did you figure it's supplying current?

generalstingz:
Good Morning!
12V 40AH LFP pack from Calb cells with a smart bms connected via bluetooth module

This is cool, I have a few of this BMS/Bluetooth for sale if anyone is interested....comes with a temperature sensor as well (though not so useful in our environment but still a good info source)

Lithium BMS with Bluetooth of various series, balancers, bus bars and lithium chargers still available

Cool, can you share your cost as well. What inverter did you go for, hybrid? Which charge controller? How much was your 12v 100AH LFP?

Enjoy your lithium!

simydan:
Okay! It's been quite some time now since I set up my system... System was initially grid dependant and did fantastically well in terms of backup and stability.

Now the system is off grid and still going strong... Though raining seasons are always dark days for off grid set up except for set ups with more than enough solar arrays.

Personally, my 520watts solar array is not bad at all for my design, considering that it's a 12V 100A set up and with the battery able to charge in a short time.

Now, the challenges I currently have is the season. With more cloudy days, my solar array is not enough to compensate for it, so I have to still switch to grid in between and sometimes also boost the battery with grid...

Truth be told! My days without power are over with or without grid supply, I still have something to go through the night.

On a sunny day, battery charging and load run complement well with the generated harvest except for days when battery was drained for more than 50% during the night.

Indeed the advantages of going Lifepo4 can not be over emphasised, starting from: 1. DOD and life cycle, 2. Charging rate and discharge rate, 3. Volume and weight...

My set up 12V 100AH Lifepo4 battery can be related to 12V 200AH set up if using a lead acid battery which is better explained below:

Lifepo4 Battery:
12V 100AH = 1200W or 1.2kWh
Which can be discharged up to 80% or 100%(though, discharging to 100% is not advisable)
You'll also need less solar panels to charge a 1.2kWh bank which translate to less cost of solar panels

Lead Acid Battery:
12V 200AH = 2400W or 2.4kWh
Which is highly recommended to discharge at not more than 50%.
But will need more solar panels to charge a 2.4kWh bank which, translate to more cost of solar panels

With high consumption rate, it's always very difficult to stay within the 50% DOD threshold. That's why Lifepo4 should be the preferred choice as it can with stand abuse of up to 100% DOD and still last longer than it's lead acid counterpart.

Trust me, mine has undergo such abuse. Especially the early days of installation during my load test and it's still standing strong. I doubt how many lead acid will survive that within six months.

So far so good! System is over seven months old and battery is still performing very well...

I guess it's time to help someone build a system too...

A few 16s, 8s and 4s lithium balancers still available. 1.2A balance current

ojeysky:
So I got a couple of few extra when I placed some orders for my use. The extras are available for sale to anyone interested. Here is the list:

50A lithium Charger with adjustable current/voltage - 50k
5pcs

ANT BMS 7s to 16s 320A without LCD display - 48k
2 1 unit

Smart BMS 4s 35A UART (with optional Bluetooth module) - 28k
4 3 pieces

8s balancer - 8k
2pieces

4s balancer - 4500
5 4 pcs

I have some busbars as well but I will need to do some calculations first to know how much extra will be available after my planed upgrade.

WhatsApp/call - 0 8 0 3 5 23 35 35

Fyi they can all be found on AE

An update on what I have left

Tvegas:
I sent Morgan Capital a mail for a reduced transaction fee because of volume of transaction i plan to do with them about 2 weeks ago, They promised to get back and till now Morgan hasn't said anything. I sent a follow up mail there was no response. Over the weekend I opened another account with Meristem, the customer service experience has been top notch.

My Conclusion: Morgan has made money or has money right now hence they don't need your kobo kobo deposits .Their live trading platform still seems better though but pride goes before fall. They need to watch it.

Meristem Customer service is in a world of its own. If they maintain those quick responses they will go far .

It's why I stick with them, though way more expensive than Morgan but it's a worthwhile cost for good customer service. I am going through a merger which has some missing stocks issues and they've been following up with CSCS including calling me to provide update or get clarity on some of my historical stock data

terrymason:
When I use my multi meter to test the continuity... it was reading that both out and in are connected together.

Let's wait for the gurus to answer o....that one pass my level

terrymason:
See the picture attached... no negative or positive terminal... "Out and In" terminal have continuity when tested with multi meter... so as PE and PE terminal... that's what confusing me.

cc: ceaser earthrealm mctfopt.

The out and in would then be the positive and negative...not sure why they labels it that way. You need to figure out which of the label is positive and which is negative.

Valto:
u need 2pcs 300w flames mono panels =85k
Schneider homaya 1.5kva 24v pure sinewave hybrid inverter =75k
2pcs 100ah battery = 110k just budget 270k. contact my good friend kiekie1

Can be cheaper

ceaser:
A "different port" BMS should be easier to work with in such scenario but I also believe "same port" BMS will work.

The urge is too much and knowing myself, I will still try it out one of these days but with a dirt cheap but functional BMS of course.

Will be good to hear your findings

The 24/320 BMS is LFP, I guess

Still acquiring some cells, so funds aren't available for high strung BMS just yet.

Yes it's 320A but can do 3.2v or 3.7v(LFP or li-ion) it's also a 7s to 16s BMS with Bluetooth.

Hmm...... Now I get your point, this would be an interesting experiment, thinking through this logically am not sure it will work; which of the BMS will terminate charge, unless there is a way the BMS exchange information I don't think the Daly BMS will do this out of box. Which of the BMS will connect to the battery positive and charger negative. It's somewhat complicated something o.

Fyi - I have a unit of 24v 320A ANT BMS left

ceaser:
Not the way you mean it.

For instance, a 24v 200ah LFP with at least a C rating of 1 will still allow 200A charge-discharge BMS. But you only have 60/80 amps charge/discharge BMS installed.

If one isn't able to get a 200A BMS, can one get similar BMS and connect in parallel with the existing 60/80 Amps BMS to get a 120/160 amps charge/discharge rating on the battery pack?

Of course most times the emphasis will be on the "charge" amps because I don't expect to approach 120 amps discharge @ 24v on regular home appliances but I would love to have my battery bank full within 2 hours of the sun emerging.

And I believe this can be achieved. These LFPs are now the types co-opted to electric cars in recent times shifting from Li-ion 18/65/0s use. And these cars when recharging can reach 50% capacity within 15 minutes (fast charge phase) and then full 100% charge in 45 minutes.

Oshomo12:
See my point, y invest so much on a useless service provider? For ur own scenario, u don't need to waste money on servo stab, just push that money in solar.
For my own case, before we could enjoy BEDC, each house will invest nothing less than 100k each, for services I will still get billed o! I dey cray ni?

I actually lived off grid for almost a year and it was fun but also with consumption planning as I don't yet have a sufficient bank/solar array to completely stay off grid and 110k won't make that happen. Ultimately I may get to that point but na slow and steady. Make I no con auction 1 kidney

ceaser:
I wonder. Is it possible to parallel two or more BMSes with similar ratings on a battery pack in order to squeeze more juice into and out of the pack, keeping in mind the C rating of course.

Has anyone thought about this?

It's certainly possible to parallel battery packs of similar ratings (both in BMS and cell capacity)

Still available for 38k 60A/100A 8s LFP BMS

mank1234:
This is low voltage for countries with 110V supply.

NiyiOmoIyunade:
86v and 110v

I think you live in the US or Canada. You just don't know it yet.

No b Una fault o....na BEDC....fyi we still get huge post dated bills with this and they threaten to disconnect our lines if we don't pay.

mank1234:
The issue with such low voltage is the stabilizer
Asume you're on 86v converted to 220v, that's 2.56 times conversion. If power suddenly changes to 220v your stabilizer will momentarily output 562V before it reacts to the change. That's is enough to damage some equipments. This happens in milliseconds but some equipments can only withstand such for few microseconds.

Low cost power strips with no self protection for their MOV will catch fire in such situations. Some electrical fires you know nothing about starts this way.

Please listen to oshiomo12 advice.

Noted, the Servo does a very good job at managing occasional surges as indeed I have experienced situation where it gets to 200v occasionally. Nevertheless I will take necessary precautions now that I know... Thanks!

NiyiOmoIyunade:
86v and 110v

I think you live in the US or Canada. You just don't know it yet.

Kudos to the A&E servo stab but you must derate your loads appropriately.

Lol.....Certainly even if I don't the stab tells me, when it's at that voltage, it basically acts as a 3kva stab instead of 10kva.

mctfopt:
That's a beast of an AVR. How much did you acquire that 10kva? Those PHCN should just try, what is 86v? Do people in your neighborhood even use this?

I bought it 110k 2 years ago, as to my neighborhood I won't be surprised if they wonder how I always have bright bulbs

Oshomo12:
@ojeysky, can you pls and pls and pls, stop using your setup with PHCN? Those voltages are evil, very very evil!
This is what i got in my area in Akure. It eventually destroyed my prepaid, my smart tv, affected my freezer, note, stab dey o. By the time i came to my senses, it has already cost me over 300k. I was very lucky though, this almost burnt down a building some 3 streets away about two years ago. Nepa now added insult upon injury, i was told to bring another 70k for prepaid meter, the one that got damage cost 50k, worked for about a year. Since then, i just stay clear of Nepa for good. They were even at my place yesterday asking me to rethink my decision after two years of NOT using them. It's me, my solar and gen, which i use once in a while around this period.

Wow it's strange though why low voltage caused this or was it a high voltage scenario?

mctfopt:
Lucky to get 150v?
Oh my! The PHCN wants to kill your equipment. These guys don't care about their customers. Dang!

Yes o, here is sample of what I get from PHCN, usually I just stick to 10A charging on those days or even as low as 2A. Kudos to A&E dunamis their servo stabilizer is superb

Justin288:
Simply reduce your charging current to the lowest, it will charge. Then increase it till the inverter stops charging. That is the sweet spot.

My brother so I thought o....I reduced to 10A(2A was the only one a didn't try) it still didn't move, even the bypass to supply current in line mode didn't happen. Though it recognise there was AC input

My 5048MK will never charge at 60A, with my big generator.

The quality of utility supply we get here has made charging beyond 30A via AC a dream for me. If not for my stabilizer that supports beyond my expectations, the 120v utility that I get would have been almost useless. I keep charging at 20A but occasionally 30A when am lucky to get 150v.

Will find time to further diagnose the Gen disagreement with my 3024GK

kadorzy:
Yes I have come across this this often.
What is the input frequency & voltage from the generator?

I actually ensured the frequency of the generator was same with what I had set on the inverter still no luck

For the first time I have a need to charge my batteries via generator but for some strange reason my 3024GK is not accepting the input from generator.

It recognises the voltage and frequency by displaying the icon of current on the inverter screen but there is no charging icon and bypass icon. Has anyone experienced this on their inverter before?

ojeysky:
I still have some Lithium chargers, 4s to 16s BMS (with Bluetooth) and balancers left o

Still available

ojtech8291:
Gel Lead-acid Battery

Okay, I have balancers for lithium

ojtech8291:
I don't have battery balancer now. How can I balance two batteries in series with a difference in voltage of 1V?

Is that a lithium battery?