₦airaland Forum

dbshaywhy:
To God be the glory, I finally switch to the lifepo4 battery user after 2 years of planning. I now enjoy uninterrupted power supply, run appliances simultaneously (no heavy appliances). Am very sure Nepa self go dey vex on me by now... Still having 120+ units on my prepaid since month of October.

fuckboys:
Abeg this valto metal battery cases dey safe so?

Allem:
Enjoy, exactly the set up I did yesterday but valto, I don't know what I did to you oh. You dey always give me non sexy battery box. See this 7.1kwh as e fine, same thing you did with 14.4kwh I bought. I dey vex.

mctfopt:
Congratulations. Welcome to the RE family. Very soon you'd forget you ever had a generator.

Some of us don't even have one anymore after porting to RE

Teophilus96:
Hello great people, I’ve been following this thread all through these past months, and I must admit that I have learnt a lot. Please I have a serious and interesting question on an observation :
I have 2 charge controllers, MPPT and PWM

With MPPT @ 12:30pm with few loads on it
Panel output:182.6Watts
The battery voltage indicator reads 13.4Volts but the MPPT controller is reading 14.9Volts suggesting that it understands that the battery is full. But this is not the case. So it reduces the power coming in from my panel and keeps that voltage without any addition for about an hour which is not normal.


With PWM and with the same loads on it
Panel output: 203.52Watts
The battery voltage indicator reads exactly the same as that of the PWM controller and in just about 15-20mins it takes my battery voltage from 13.4V to 14.6V meaning it’s charged to full capacity with the PWM.

Please what could be ascertained from this test pls?
Thanks in anticipation

fuckboys:
he didn't start using renewable energy today, HE CURRENTLY SWITCHED TO A LIFEPO4 BATTERY probably after previously using some older battery technology.

mctfopt:
It's metal, therefore safe.

Add other safety features like fuses and breakers for added protection during installation.

mctfopt:
You will need to get a meter to verify the readings from both charge controller.

Also what type of battery and what is the specifications of solar panels and the connection configuration of the solar panels?

Allem:
Enjoy, exactly the set up I did yesterday but valto, I don't know what I did to you oh. You dey always give me non sexy battery box. See this 7.1kwh as e fine, same thing you did with 14.4kwh I bought. I dey vex.

fuckboys:
Joshnka has been building lifepo4 batteries for close to 10yrs even before Nigerians heard of it. He built my battery and would never incase it in metal , I don't know sha.

BigDickProblems:
I’m experiencing the same thing here too with the same controller.

It will stuck at 13.3V on my battery and will still power few loads but will not charge anything even at about 200watts input from the panel.
I use LifePO4

abcabc234:
@ everyone good evening

please what is the moderate/maxiumum current rating for solar pv cables (4/6/10/16mm2).. Would aprreciate a chart or any other information as a guide

can i rate dem as normal A.C electrical cables..

olopan:
@BigDickProblems @boiz2men

Did you guys by chance select the Lithium profile?

And maybe also tried making the charging voltage and float the same Voltage?

munchies:
Please I need a recommendation on the best system to install in my house.
Daytime loads will be only the freezer which is less than 200w

Night time is about 10 energy saving bulbs which won't be on at same time, TV is 50w, 1 laptop which won't be on all the time, about 5 phones for charging,
Please what inverter, battery capacity can I use?
What number of panels and watt will be suitable for charging with sun?

Valto and other gurus please help out.

boiz2men:
I'm not sure what he did

olopan:
@BigDickProblems @boiz2men

Did you guys by chance select the Lithium profile?

And maybe also tried making the charging voltage and float the same Voltage?

BigDickProblems:
Yes I did.

olopan:
I think maybe this could be a flaw in the new Felicity charge controllers.

olopan:
Check the link on my profile via a laptop and put in your loads as you intend, the answer will be at the bottom of the page

fuckboys:
Joshnka has been building lifepo4 batteries for close to 10yrs even before Nigerians heard of it. He built my battery and would never incase it in metal, I don't know sha.

fuckboys:
Joshnka has been building lifepo4 batteries for close to 10yrs even before Nigerians heard of it. He built my battery and would never incase it in metal, I don't know sha.

kristien4:
@all, pls what guage of wire should be used for 100amps dc current, for battery to inverter. Can 16amps cable work?

Valto:
25mm upward best, 16mm might be manageable if really full guage. also depends on distance, the longer the thicker

Teophilus96:
My findings is that my Felicity MPPT is not set well, I believe. The controller reads my battery as full, whereas the PWM keeps charging it because I was able to set it better.

My panels are 3parrallel connection of 200watts panels. It’s a LifePo4 battery. I am not just getting the settings of my MPPT controller yet. Can you help?

Especially with the Absorbtion voltage and Float voltage. It’s not like I don’t know these things I have set the values appropriately (14.4V and 13.6V respectively) but they didn’t help. I have tweaked in a lot of ways but still experiencing the same thing.

So what I do now like I saw someone here do too, was use the MPPT to charge it fast to that point where it will no longer charge the battery, and then continue charging with PWM for full charge and then connect back to MPPT for proper voltage regulation. This is what I’ll keep doing till I get it right.

But I’ll really appreciate if you can help me as well as I have seen you have such a vast knowledge on these things. Thanks.

kristien4:
@all, pls what guage of wire should be used for 100amps dc current, for battery to inverter. Can 16amps cable work?

Nltaliban:
Good morning people, I have been following this thread for a while and I have gained a lot but I have a question.

Since Lithium batteries are the best, Can a 1kva Welion hybrid solar inverter work well with 100ah 12v lithium batteries without issues?

I’m asking because the charging current on the inverter is rated 40a, is that not too much for 100ah battery?

Or can Welion inverters be set to only charge the batteries at a party Amps?

mctfopt:
MPPT tends to perform better if connected in series. If you mentioned your MPPT max VoC and your solar panel VoC that could help. PWM on the other hand tends to perform better the closer the PV input voltage is to the system voltage.