₦airaland Forum

HeavenlyBang:
The last lead acid 12v 7ah I bought from Jumia didn't even last two months before it stopped powering the fan for up to an hour.

Decided to never buy a lead acid replacement again.

I don't expect this to actually be 9.8aH, but even at 6aH or so I'd be satisfied.

ola12:
Thanks. I'll rather go for a 1kva as I just need something strictly on a budget which'll do the job of supplementing my grid/replace it on off nepa days for powering my laptop+fan.
I was going for this one specifically but no felicity dealer has it in stock, if someone knows why or has used it with reviews please let me know.

If there're other really trusted 1kva 12v hybrid inverters I can get instead I'll appreciate the information

mctfopt:
That LA small size battery has horrible lifespan. Especially when you buy off brand. Branded type is often too expensive for an LA battery.

Ahyjo:
Please how genuine is this Valto guy ?

nothing to worry. we are tested and trusted
with a 16yrs old active no blemish nairaland account! we can waybill to any location in Nigeria and west Africa or u can also visit our office at no:29 ibusa road Asaba delta state.

HeavenlyBang:
The last lead acid 12v 7ah I bought from Jumia didn't even last two months before it stopped powering the fan for up to an hour.

Decided to never buy a lead acid replacement again.

I don't expect this to actually be 9.8aH, but even at 6aH or so I'd be satisfied.

HeavenlyBang:
The last lead acid 12v 7ah I bought from Jumia didn't even last two months before it stopped powering the fan for up to an hour.

Decided to never buy a lead acid replacement again.

I don't expect this to actually be 9.8aH, but even at 6aH or so I'd be satisfied.

brightk:
u just de run from pillar to post.buy ur battery from trusted sellers here n take some chill pills

Nteogwuija:
Thanks for responding. First, it's a 12v system. The array is 350w(x3).

Secondly, I'd assume the panels are still in good condition cuz I still get around 73 volt from a possible 77.1 volt at times.

Also, it's a 2 storey building and the landlord doesn't like the idea of me having the panels on the roof, so I had to make a stand and mounted it beside the house.

When I first installed it, the location it was mounted would get sunlight until it was 2PM. And I do get around 500w during those peak periods.

But few weeks ago I started observing that once it's 12PM, these days it's even worse - 11PM, the sun moves directly above the building, and then the building shades the sun away from the panels.

And then the PV's production drops to around 100w.

Dam5reey1:
Haisic Almost ready..

HeavenlyBang:
0.13c recommended charge current and 0.25c recommended discharge are brutal.

Valto:
wow , i have something very similar , it is 200A charge and discharge JK bms used

bassdow:
This is why even a Premium quality brand wouldn't last as expected.

You started using the battery from battery strength of 100% even when there's no NEPA light. After a while, NEPA / PHCN took the light and the battery is currently at 90%, then you ran it to 73% before they brought light again.
You started reCharging the battery, while using said Fan (hence recharging would be slower) and the battery moved from 73% to barely 78% before NEPA took the light again.
In your mind, the Fan's battery would have recharged to a large extent.

Give it a couple of weeks and despite being regularly plugged to NEPA, that battery would run to almost 5% which is low enough to slowly damage the battery.

---

Even if you buy a premium quality one, e go still die due to the way the Fan operates. It's rarely gets charged completely. Couple that with the fact non Lithium batteries takes longer to full recharge.

If you want to enjoy the fan, and stop wasting money constantly changing batteries, either get a dedicated battery management system. You don't even need a BMS, just something that would cutOff at set voltage / current. That way the Fan would refuse working till the battery is recharge to meaningful extent.

Alternatively, buy a Lithium battery that's inbuilt a BMS, or if you don't wanna spend much, buy a very very cheap PWM charge contorller, and use the Load terminal - it would disconnect the moment the battery goes low.

You got numerous options, you just need think and make a decision

HeavenlyBang:
0.13c recommended charge current and 0.25c recommended discharge are brutal.

Valto:
wow , i have something very similar , it is 200A charge and discharge JK bms used

HeavenlyBang:
You just made up an entirely fictional use case here.

I use solar and I'm off-grid from 7 am to 9 pm every day. That's 14 hours of power, which is enough to charge a battery full.

Also, I live in a Band A area and there's typically power supply on 95+% of nights. The fan battery is massively understressed and mostly just exists to fill in the gap for the 1 or 2 hours in the middle of the night when power may go off. I definitely don't cycle the fan battery anywhere near regularly.

And yet it lost most of its capacity in a few months. I don't think I even cycled that battery more than four or five times before it died. It's just a shortcoming of the chemistry, since I guess the battery was in storage for a while before I ordered it

bassdow:
something occurred to me this morning. it could be your Charge Controller playing games with you.

A charge controller that is lower than the load would seem to work well before 12pm when the Sun fully resumes duty. By the time the Sun light comes out fully, it would start fluctuating.

Check the display of the charge controller, observe the lights that blink, note if they suddenly starts blinking seriously, or those that were not blinking in the morning, suddenly started blinking late in the Morning / afternoon.

Also, you need tell us how you're able to come to conclusion of how much power was harvested

Valto:
nothing to worry. we are tested and trusted
with a 16yrs old active no blemish nairaland account! we can waybill to any location in Nigeria and west Africa or u can also visit our office at no:29 ibusa road Asaba delta state.

Gshems:
Are you using an mppt charge controller or a glorified pwm?
Are you sure your panel ain't fake?

My guess is that you bought fake panel. Panels that are not up to it's rated capacity.

No matter how bad the shading can be you shouldnt be getting 100watts from a 1050 watts panel.. If you have the picture of your charge controller and your panels, post them here.

bassdow:
@Nteogwuija , in other to be able to make a guess of what might be going on, let's take things step by step.

1. First show us the Sticker of your Charge Controller. The sticker is often attached to the device. We equally need to see images of the front and back of your charge controller.

Hopefully it's MPPT else that automatically is the issue. Even if it's MPPT, we still got to be sure it ain't a glorified one

mctfopt:
I have none. Try Welion

chris81964:

https://www.youtube.com/watch?v=evYKaUTzE7w

mctfopt:
Hello Dr Solar, that thing at the centre of the pipe that I'm seeing is it the earth rod?

Using pipe is a cool way of running earth. I even saw one, at one flow station, where the pipe is galvanised steel.

Akaza:
590w Jinko Solar panel
New
#135k

Growatt 5kw Hybrid inverter
New Sealed (receipt)
#570k


Pickup in Ilorin

chris81964:
Yes it is. We have been doing this for years.

obinna37:
Flash sale

EAsun power puresinwave 4000w inverter continues power is 2500w) it can power your fridge or freezer and others

Owner is upgrading

Price #120k fix

08034034206

numericalguy:
I know what a relay is. I have a first degree in Electrical engineering and masters degree in Telecommunications engineering.

HeavenlyBang:
Replacement battery for rechargeable fan. 14.8v 9.8aH li-ion.

Will provide updates if/when I receive it.