₦airaland Forum

BigDawsNet:
Why is the battery not always strong?

Whenever I think about the solar.. People just talk abt the battery lives?

Substandard/fake products and battery abuse

oloyemeji:
After 3pm all heavy appliances are switch off, that is how i have been using it, but i am thinking if getting additional two batteries can boost more power, i have other two additional panels to make it 10 panels, but yet to decide if i will need two more batteries.

Never mix old and new lead acid batteries. The old ones would wear the new ones out in no time.

Also make sure your batteries are fully charged. It's possible the batteries do not float.

Can you quickly list the appliances you use after dark and their wattage alongside the time those appliances run

.

oloyemeji:
The installer did not tell me that the batteries is damaged, could it be that he not been honest?

Whosoever paired a 3.5kva inverter to just 2 tubular batteries needs to be flogged except he has given you strict instructions not to power some appliances after dark.

Even if you increase your batteries to 4, you shouldn't draw past 80amps in total and that's about 800 to 900 watts anything more than that you are stressing your batteries.

Only lifepo4 batteries can handle those abuses. Just get a small lithium pack instead and upgrade gradually.

oloyemeji:
I have the same setup as exactly like this except mine is just two batteries instead of 4 batteries, I install it last year January but recently the battery does not hold more power so by 11pm it will be down, my installer said i need to add more distilled water to the battery, and I am thinking of adding two more panels to make it 10 and also add two more batteries, what do you advice?

Just dispose those old batteries, you have damaged them. Buy 4 new batteries and upgrade your solar panels

Finally and most importantly, carry out an energy audit and replace all old appliances in your home with more efficient ones. Never draw more than 200watts per tubular battery after sundown.

Buchika:
what of inverter freezer of 120 watts . Does the above statement apply too.

Nothing is wrong with running a freezer on a 12v system. Just have sufficient battery bank.

People need to stop condemning 12v systems abeg. They are okay for loads up to 2kw, just that I would suggest a 24v system if you would be continuously drawing more than 1kw energy.

A 24v system with just two 220ah tubular batteries is no better than a 12v system with same battery bank.

For a regular freezer or inverter freezer a 1kw 12v system with surge capacity of 2kw is more than OK. Just turn on the freezer first before other appliances.

I just laugh when I see a 3.5kva inverter connected to two 220ah tubular batteries. Your batteries would die in 3 months if you fully utilize the inverter.

easyyoke:
Abeg make una help me

6mm will suffice

Cmeo:
Don't get it wrong, epileptic power supply and corruption has been here not today and those company has been here too not today. It just got worst now that importation is profitable than production that's why they are dumping production for importation which the new import tariff foreign exchange rate is currently discouraging.

Before now, our government has been too lenient with consumers products importation and paying lip service to encourage production. Those leniency should only be given to manufacturers raw materials and not consumers goods as we have it now

An ignorant part of you forget that you are part of the government whether directed or indirectly; deliberate or non-deliberately through your actions or inactions.

In your mind now devaluation of the currency is the right way, what happened to banning the importation of those said goods, they did with male wears, frozen foods and rice. Stop defending nonsense

mahkanjuh:
Thanks, but please 800k should be able to get you more than this

Have you purchased anything lately?

Pablo10:
Thank you.
Can you direct me on what I'll be needing and how I'll get them?

Get a 12v 100ah lithium battery, a small inverter say 1kva, solar panels, charge controllers, cables and others

When we are ready we would take to the streets

Pablo10:
Good evening sirs. I need your advice.
I'm considering getting a solar for my one room self con at school. Futo owerri.
These are the things I'd like to power.
Ps5
Table top fridge (mini fridge)
43inches tv
Samsung soubdbard
Standing Fan
Phone chargers
Then one laptop

I don't need to power all at ones, I can alternate their running, if it helps reduce the cost of getting the solar system.
I'd appreciate your feedback

Budget minimum of 800k

ObalendeCMS:
Truth be told!

Most nigerians don't have business with the dollar.

This is some form of distraction from the disobedient nigerians.

But when government wants to pay or remove subsidy they quote exchange rate abi. Continue

JoeSef0:
For 5 bar it was around 13.2 for the 3 bar it was below 12.5

Well, I don't think there's anything wrong with the battery, you need to be sure of the self consumption of the inverter I guess it's almost 50 watts.

Note that Lead Acid batteries are fully charged at 12.6v, the 13.2 is just surface charge that disappears in seconds/minutes once charger is unpluged.

You can try charging with an external charger and charge at 14.5v let's see if there's a change

JoeSef0:
I have this mopower 1.7kva inverter and a 220ah tubular haustrom battery. After fully charged with either PV or electricity, the battery drops 2 bar out of 5 bar in the charge controller screen that's without load, just inverter. Battery is just 6-7 months old and I've been experiencing it since installation. I want to know if this is normal.
It was charged full last night. The inverter screen indicated it was fully charged. But while nepa took light the bar and voltage dropped.

Can you state the voltages at 5bars and 3 bars respectively.

JoeSef0:
It's a brand new 240ah xtra power tubular battery

It's your battery or cable. The battery may not be fully charged. Make sure the battery is fully charged then reduce the cable length and increase the cable Guage. I doubt anything is wrong with your inverter.

You'd be surprised it's hitting LVD due to the in ability of your battery to provide the surge needed to start up the compressor. You can solve this problem by adding one more battery to the set up and increasing the cable size.

I won't advice you to power your freezer with just one battery. You'd be exceeding the recommended discharge current since you will be powering other things/appliances too. Your battery would die in less than 2 years.

Forget that 105watts written on that freezer the apperent power is different which increases energy losses so in real life situation your freezer is using up more than that 105watts

JoeSef0:
Good day boses
I just installed this 12v 2kva Sms sunmate Hybrid inverter. Owner has a cheat freezer of 105w. My concern now is, the inverter couldn't power the freezer even while all other loads are off.
I know freezer has an higher startup current, i just thought the 2kva will be enough to power it.

My question is, what size of inverter will be recomendable for that size of freezer?

Give info abt the battery. I can bet it's hitting LVD, make sure the batteries are fully charged.

Link

..

ojesymsym:
I thought LiFe04 are not supposed to be charged at voltages higher than 3.65, at least that is what they wrote on my EVE cells.

Well, the batteries won't really be charged above 3.65, the voltage difference is what helps charge the batteries,the bms often shuts charging when batteries are full. Thats why I said the batteries are considered fully charged at 13.6v

Let our ogas in the house contribute. My knowledge is kinda limited in some areas.

Penuelseun:
li-ion does not do so good in a 12v configuration, best for 24v and 48v systems, has a greater energy density than lifepo4 albeit with lower cycle life. Also 12.0v is not 20% dod for a 3s battery pack as you have a voltage range of 4.2v to 3.0v if you are discharging to 80%. Lfp is also fully charged at 14.4v while 80% dod is at 12.8v

12.0v is 20% Dod for li-ion 3s configuration. Lfp is fully charge at 13.6v(when the charger is disconnected), 14.4v is the voltage when the battery is still being CHARGED, same thing applies to Lead acid batteries (flooded) charged at 14.2v to 14.6v depending on temperature and while at rest, it's fully charged at 12.7v.
On a final note, depending on your source of information and brand of LFP I'll stick with 12.8v for 80% DOD (to avoid over discharging)

Jefferyzz:
18650 li-ion or which 1 boss
18650 has higher nominal voltage than Lifepo4 nah
Some of them even dey do 1c too
Few do over 1c sef.
Down side is d cycle life
Average Lifepo4 will give u at least 2x of wat 18650 will give
Unless there are other li-ion dey use in solar applications sha

Yes lithium ion do have higher nominal voltage but the voltage sag is more noticeable on lithium ion than lfp.

Please check my modified post

isangjohnson:
Do you mean lfp battery is more superior than lithium ion battery in terms of load handling, assuming there are the same capacity?
Lfp could be discharged to 80% dod. Is lithium ion not having the same dod?

Yes, lfp handles load better than lithium ion because lfp has a more stable voltage during its discharge. Lithium ion can also be discharged to 80% but voltage will be much lower and this affects inverters performance.

For comparison, LFP fully charged at13.6v and 12.9v at 80% Dod while lithium ion 12.6v at fully charged and 12.0v at about 20% DOD. Note the voltage difference.


Most times, inverters will hit LVD on some load while using lithium ion despite having a lot of juice but it rarely happens when you make use of LFP (especially when your battery bank is not large).

Though you can correct this by changing the configuration of the lithium ion by changing from 3s to 4s but this usually cause a problem with getting the voltage to work with your inverter especially 12v systems.

isangjohnson:
3kva inverter with 1.4kwh lfp battery powering 400w loads for 10 minutes
We're used to deceitful market strategies in this country.
I just hope and pray it would serve you for at least 4 yrs.

It's obviously not upto 1.4kwh and I'm almost sure it's not lfp. It's most likely made from used lithium ion batteries. For lithium ion Battery, the capacity is about 120amps. Drawing over 40amps from that will make the voltage sag so much that it will trigger LVD.

swagifted:
the naija in you jumped out very quickly.

In real life usage, assuming both are subject to same loads, I think those GRADE C will outperform the GRADE A, depending on the Grade of the GRADE C cells.

I might be wrong though

swagifted:
If you have this two option for the same price which will you choose.... , option 1. GRADE A lithium battery 15kwh, option 2. GRADE C lithium battery 70kwh.

Grade C

But seun is yourba now. I want to check something

oloet:
TBB inverter?

Transformer based

swagifted:
my 3kva satchet inverter de struggle to start 100 watt fridge o

I doubt the problem is from your inverter. Upgrade the size of the cable connecting the inverter to the batteries. Also shorten the length of the cable connecting the batteries to the inverter. Finally, make sure your batteries can adequately provide the surge current needed to start the fridge without dropping voltage to a very low one.

I have run a chest freezer of 150watts with a 1kw sachet inverter without issues. I have also run a 90watts fridge on a 500watts inverter before.

The only downside to using these sachet inverters is how poorly they handle electrical surge.

My TB inverter has been gathering dust for long. Those things are power guzzlers. Except you have deep pockets stick with sachet inverters.

Most people buy inverters they will never fully utilize.

You should have flogged the evil spirit out of him since he was a kid.

ewizard1:
10 x 220ah batteries to power 600W load for about 20hours?

Actually that's for 14 hours. Is it too little or too much

jikaseo:
Load is over 600watts. How about if I get a 2000watts sachet inverter with the two extra panels? I'm looking at optimizing the output with not much cost..

Well, that might help improve your performance. Your freezer and other appliances should only be used during the day, you will have to reduce your "sun-down" loads to a max of 200w. If you are lucky not to have damaged your batteries your inverter should go off around 1 - 2am.

In order to continuously power the load of over 600watts after sunlight till the next sun light you need a minimum of 10 220ah batteries. If you buy less than that be ready to replace your batteries in about 12 to 18 months.

So my advice, power the heavy loads during the day and manage your load once it's sundown. Your current battery back up can only support a about 100w after sundown till the next sunlight.