₦airaland Forum

AdexAyanfe:
Please guys, I need either of these usb dc module, who fit help me get abeg. I don find am for Ilorin tired 😫.

AdexAyanfe:
Please guys, I need either of these usb dc module, who fit help me get abeg. I don find am for Ilorin tired 😫.

okikigsm:
There is a man at akure that has it but I dont know how easy d logistic go be .

Also some guys dey ib ,I will help u ask

officialfestus:
I can help you ship directly from aliexpress to your doorstep.

Conner44:
Please can someone tell me the minimum power/wattage of solar panels that I can connect to a 100 amp pwm solar controller? I fear I have bought one that is too much for my needs.

I want to power 3 devices 24/7 with my setup. I have the charge controller plus

1. Raspberry pi 5 pc drawing 5v 4a

2. Raspberry pi zero 2 drawing 5v 2a

3. Ethernet switch drawing 5v 1a

I am not connecting anything else to the controller as load apart from the above 3 units. I have one 12v 90AH lead acid battery and one 3.2v 72AH CALB LifePo4 battery. I think I can't use the LifePo4 because I made the mistake of getting the pwm charge controller right? I just want to use one out of the two batteries for my setup for now and leave room to upgrade later but my next purchase will be a solar panel to power the setup although I need help to know the right size/power of panel(s) to buy that will power all three of my machines during the day comfortably and also recharge the battery for use during the night when the sun goes down.

My plan is to connect the panel to the 100 amp controller, connect one of the batteries to the controller to recharge and use a step down/up buck converter to give me an output of 5v 10a max. Is tbis possible?

Penuelseun:
The 12v 90ah battery will work, you can use a 150w panel to charge it up, you will need a buck converter to step down the 12v to 5v so you can use it with your appliances

Conner44:
Okay so what you're saying is that my wiring should look like below:

150w panel -> 100a charge controller -> 12v 90AH battery -> 5v 10a DC to DC buck converter (connected directly to the battery) -> the 3 computers I have as loads? CAN THIS SETUP PROVIDE 5V 10A DURING THE DAY WITH GOOD SUN TO COMPENSATE FOR THE LOAD ON THE BATTERY WHILE ITBIS BEING RECHARGED BY THE SOLAR CONTROLLER?

I am also contemplating buying two of the below items to use in the wiring setup :

Pic 1. 12v automatic low power shut off to stop the battery from discharging past 50% of its capacity (45AH) for longevity of the battery.

Pic 2. 12v to 5v 10a dc converter

OR

Pic 3. 5v 5a & 5v 3a Ubec step down converters (I will use the 5a for the bigger machine and the 3a for the remaining 2 machines)

Penuelseun:
go for 1 & 2, buy a higher current rated buck converter maybe 20a to accommodate all your devices

olaztek:
The buck converter is designed to supply constant voltage / constant current and it's good for charging Lithium battery.

Before connecting the battery, set the output voltage to 12.7v with the help of a multimeter/voltage meter, Then connect the battery, the green light will immediately change to blue light to indicate charging.

Once the battery reaches 12.7v, the green light will turn on to indicate full charge. The buck converter Will not overcharge the battery beyond the set voltage.

And one advantage of the buck converter over pwm cc is that it can be connected to any number of solar power rating be it 100w, 500w or 1000w and it won't burn out because it has a current limiting function ( you should know how to set the charging current within the buck converter limit - 8amp)

tetralogyfallot:
what type of batteries do u have?

akseph1:
I am sorry for responding late. It is due to some circumstances.
I salvaged this from laptop batteries. I should have close to a hundred of it.

tetralogyfallot:
Cell balancing is a very important part of building any powerpack. This will balance the voltage of all the lines.

officialfestus:
by connecting in parallel?

akseph1:
I am sorry for responding late. It is due to some circumstances.
I salvaged this from laptop batteries. I should have close to a hundred of it.

okikigsm:
Run one or two basic test on it and use it .don't let that discourage u.start with what u have now.your experience on it will be your guide and be advantage later,u will still use Premium batteries in future build bro.

officialfestus:
my salvaged laptop cells are doing excellently well.
Akseph1

NACE13:
Please, house my li-ion knowledge is quite limited and I have decided to ditch my UPS and build my own battery bank from scratch.
I have gotten a grasp of the set up but I got confused with the buck converter stuff. Do I need a buck converter if I already have an inverter i.e will a 12v inverter do the work of a buck converter? Is the buck converter same as step down module?
Will the BMS protect the batteries from over discharge and over charge as well?
Lastly, where can one source for some items like 12v inverter, battery and
volt/current indicator locally?

Penuelseun:
Your accessories can be sourced from alaba if you are in Lagos or order them from Konga

okikigsm:
See what I have so far and yet we still dey manage buy second grade small small

NACE13:
Please, house my li-ion knowledge is quite limited and I have decided to ditch my UPS and build my own battery bank from scratch.
I have gotten a grasp of the set up but I got confused with the buck converter stuff. Do I need a buck converter if I already have an inverter i.e will a 12v inverter do the work of a buck converter? Is the buck converter same as step down module?
Will the BMS protect the batteries from over discharge and over charge as well?
Lastly, where can one source for some items like 12v inverter, battery and
volt/current indicator locally?

officialfestus:
good morning boss.
If a regular car battery can fully charge a lithium ion battery with bms installed without any issues. Then a normal inverter of 24v should be able to charge a 24v 7s battery without issues also?

Cc dollarnaira ewizard1

odimbannamdi:
This your question no clear. Revise it. A battery doesn't charge a battery

officialfestus:
good morning boss.
If a regular car battery charger can fully charge a lithium ion battery with bms installed without any issues. Then a normal inverter of 24v should be able to charge a 24v 7s battery without issues also?

Cc dollarnaira ewizard1

Penuelseun:
You don't need a buck converter if your charge controller is capable of charging the battery without issues. Yes, your bms is there to protect your cells against overcharge and over discharge but count your bms as a last resort, you should never allow your setup to get to those stages frequently or you risk damaging your cells

NACE13:
Thank you.
I'm not going solar yet, if that's the charge controller you are talking about. I just want to use normal electricity i.e PHCN or generator to charge it for now.
Before we get to the BMS as the last resort, what should be put in place before then for proper protection of the cells?

NACE13:
Thank you.
I'm not going solar yet, if that's the charge controller you are talking about. I just want to use normal electricity i.e PHCN or generator to charge it for now.
Before we get to the BMS as the last resort, what should be put in place before then for proper protection of the cells?

omakay:
Yhello, house. I just want to know how you guys protect your devices against thunder and lightning. Thanks