ojtech8291:
Good day everyone, please where can I get 12kw/48v 3phase Hybrid Inverter? Thank you all.

You can contact me in my signature or drop your number

.

AyarmBoye:
but it doesn't look like it charges it... I mean my system goes off as soon as theres power outage...and the battery feels cold even when d ups is warm.... Note :d battery is outside not inside d ups... Please what can I do.... My load is approximately 200watts

Is that actually 200W? Like, Two hundred Watts.... Or you meant to write 20W?

200W on 18ah Battery is a suicide usage.

Maybe, you've actually murdered the battery and that's why it goes off immediately at power outage

Topmost11:


Cable from aliexpress? How did you ship?

Yes cables, laptop charger head accessories, and male and female adapter's, was shipped with Yenwen and it took just 3weeks

mcTrinity:


Is that actually 200W? Like, Two hundred Watts.... Or you meant to write 20W?

200W on 18ah Battery is a suicide usage.

Maybe, you've actually murdered the battery and that's why it goes off immediately at power outage

bro it's a new battery... All I just need is 1 minutes to shut down my stuff..... I think it should be able to handle 1min now...

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earthrealm:

Cc ayarmboye

Read it well. He said 18ah battery..going by the 10% batt charging re. This implies 1.8amps.
Am fairly certain a 650va ups will be outputting something close to that.if not more

On the contrary, a 650va ups outputs around 1amp

AyarmBoye:
bro it's a new battery... All I just need is 1 minutes to shut down my stuff..... I think it should be able to handle 1min now...

Backup Time = (Battery capacity x 12V x N x Efficiency of the inverter or pf) / Load (watts)

12V= voltage of the battery
N= number of batteries in the system
Efficiency= 70% ( I usually assume a lesser value of efficiency for a more accurate estimate, but I will use 70% or 0.7 for this calculation)

Backup Time = (18 x 12 x 1 x 0.7)/ 200 = 0.756hours or 45minutes


So ideally you should get a 45 minutes backup time

But in theory things are hardly ideal.

Charging time of battery = Battery Ah / Charging Current

Assuming the UPS has a 2A charging current, it'll take it 9 hours to fully charge the battery


www.nairaland.com/attachments/10948338_xwzef_png85ead5b87abc2fd4c8c924cb0ea9bf4a

Let's say that this is a battery with 7Ahr capacity and that you want to draw 14A. You'll have to observe the 2C curve (2C means to discharge at 7Ahr*2/h=14A). You'll note that this battery will drop to 9.5V-10V after about 15mins. Of-course this is only true for a fresh from the shelf battery kept at 25 deg.Celsius. Temperature, age and usage negatively affect the performance.

But the truth is, using 18AH battery that is obviously not fully charged to backup a load of 200w may likely not give the desired results.

Pls between LG dual inverter AC and Termocool Gen pal, which is better in terms of energy saving and cooling?. Thanks in advance.

mctfopt:



Backup Time = (Battery capacity x 12V x N x Efficiency of the inverter or pf) / Load (watts)

12V= voltage of the battery
N= number of batteries in the system
Efficiency= 70% ( I usually assume a lesser value of efficiency for a more accurate estimate, but I will use 70% or 0.7 for this calculation)

Backup Time = (18 x 12 x 1 x 0.7)/ 200 = 0.756hours or 45minutes


So ideally you should get a 45 minutes backup time

But in theory things are hardly ideal.

Charging time of battery = Battery Ah / Charging Current

Assuming the UPS has a 2A charging current, it'll take it 9 hours to fully charge the battery


www.nairaland.com/attachments/10948338_xwzef_png85ead5b87abc2fd4c8c924cb0ea9bf4a

Let's say that this is a battery with 7Ahr capacity and that you want to draw 14A. You'll have to observe the 2C curve (2C means to discharge at 7Ahr*2/h=14A). You'll note that this battery will drop to 9.5V-10V after about 15mins. Of-course this is only true for a fresh from the shelf battery kept at 25 deg.Celsius. Temperature, age and usage negatively affect the performance.

But the truth is, using 18AH battery that is obviously not fully charged to backup a load of 200w may likely not give the desired results.

mehn..... Alright thanks bro... I will get a bigger battery plus charger den... God bless

AyarmBoye:
but it doesn't look like it charges it... I mean my system goes off as soon as theres power outage...and the battery feels cold even when d ups is warm.... Note :d battery is outside not inside d ups... Please what can I do.... My load is approximately 200watts

2 HUNDRED WETIN?? . The total energy in that battery is 12v x 18 -- 216wh, a 200w load will last aout 35mins on a new 18ah battery, and would likely kill the batt within 3months.....after which it will barely last 5mins

am looking for a budget install for borehole water supply.1k or 2k liters tank
am looking at 3 options. has anyone deployed any of the options listed , or has a superior option to recommend to me.

note: 2 x 250w panel , 850va luminous hybrid inverter, 12v 200ah quanta battery, 12/24v 100voc fangpusun 50aD mppt CC already exists in the house

option 1: get a dc sumo pump and power it directly from solar panels fitted with overflow regulator

option 2: get a normal 0.75hp or 0.5hp sumo pump, get 2 x 12v 200ah batts or equivalent LIPO4 and 4 to 6 units of 250w panels, with a 2kva or 2.4kva hybrid inverter with surge capability

option 3: get a battreyless inverter and connect the sumo in option 2 directly. 6 x 250w panels needed

viazi:
Pls between LG dual inverter AC and Termocool Gen pal, which is better in terms of energy saving and cooling?. Thanks in advance.

I use the 1.5hp Gen pal and on least cooling (L1) It peaks at 700w. I think I heard LG peak at 900w on its lowest cooling.

earthrealm:
am looking for a budget install for borehole water supply.1k or 2k liters tank
am looking at 3 options. has anyone deployed any of the options listed , or has a superior option to recommend to me.

note: 2 x 250w panel , 850va luminous hybrid inverter, 12v 200ah quanta battery, 12/24v 100voc fangpusun 50aD mppt CC already exists in the house

option 1: get a dc sumo pump and power it directly from solar panels fitted with overflow regulator

option 2: get a normal 0.75hp or 0.5hp sumo pump, get 2 x 12v 200ah batts or equivalent LIPO4 and 4 to 6 units of 250w panels, with a 2kva or 2.4kva hybrid inverter with surge capability

option 3: get a battreyless inverter and connect the sumo in option 2 directly. 6 x 250w panels needed

Option 3 may be most effective though(depends on the type of cc) am not sure 6 panels will be sufficient. You may plan for 8

Option 2 will be my second preference though the lifpo4 variant ;-)

earthrealm:
am looking for a budget install for borehole water supply.1k or 2k liters tank
am looking at 3 options. has anyone deployed any of the options listed , or has a superior option to recommend to me.

note: 2 x 250w panel , 850va luminous hybrid inverter, 12v 200ah quanta battery, 12/24v 100voc fangpusun 50aD mppt CC already exists in the house

option 1: get a dc sumo pump and power it directly from solar panels fitted with overflow regulator

option 2: get a normal 0.75hp or 0.5hp sumo pump, get 2 x 12v 200ah batts or equivalent LIPO4 and 4 to 6 units of 250w panels, with a 2kva or 2.4kva hybrid inverter with surge capability

option 3: get a battreyless inverter and connect the sumo in option 2 directly. 6 x 250w panels needed

Option 2 is your best bet; The sun variations is different; the presence of batteries in your is also to cover up for this variations, for instance the sunlight goes down, the battery then bridges the gap.

Barezzi:
Great! Hit me up via outlook back channel make we tidy this up expeditiously.

Hey Chief, any progress on your pylontech moves? can I holler at you outside here?

earthrealm:
am looking for a budget install for borehole water supply.1k or 2k liters tank
am looking at 3 options. has anyone deployed any of the options listed , or has a superior option to recommend to me.

note: 2 x 250w panel , 850va luminous hybrid inverter, 12v 200ah quanta battery, 12/24v 100voc fangpusun 50aD mppt CC already exists in the house

option 1: get a dc sumo pump and power it directly from solar panels fitted with overflow regulator

option 2: get a normal 0.75hp or 0.5hp sumo pump, get 2 x 12v 200ah batts or equivalent LIPO4 and 4 to 6 units of 250w panels, with a 2kva or 2.4kva hybrid inverter with surge capability

option 3: get a battreyless inverter and connect the sumo in option 2 directly. 6 x 250w panels needed

please note 0.5hp ac sumo is 700w. Just get 24/36v dc sumo, consumption is around 200-320w. Your best bet is 24v/200-320w, you can parallel 2pcs of 24v/200w to achieve this, no inverter, battery, controller is needed. Just avoid ac pump. This option is cheaper

HETER LIFEPO4 BATTERY NEEDED

THE 480WH MODEL

WITH OR WITHOUT CHARGER

earthrealm:


2 HUNDRED WETIN?? . The total energy in that battery is 12v x 18 -- 216wh, a 200w load will last aout 35mins on a new 18ah battery, and would likely kill the batt within 3months.....after which it will barely last 5mins

me I just need 1-2 minutes for me to shut down.. Lobatan...... But it won't even last 1 second... And battery nah new.. Don't think ups is charging it sef

earthrealm:
am looking for a budget install for borehole water supply.1k or 2k liters tank
am looking at 3 options. has anyone deployed any of the options listed , or has a superior option to recommend to me.

note: 2 x 250w panel , 850va luminous hybrid inverter, 12v 200ah quanta battery, 12/24v 100voc fangpusun 50aD mppt CC already exists in the house

option 1: get a dc sumo pump and power it directly from solar panels fitted with overflow regulator

option 2: get a normal 0.75hp or 0.5hp sumo pump, get 2 x 12v 200ah batts or equivalent LIPO4 and 4 to 6 units of 250w panels, with a 2kva or 2.4kva hybrid inverter with surge capability

option 3: get a battreyless inverter and connect the sumo in option 2 directly. 6 x 250w panels needed

Option one will be very cost effective as it will take away the cost of inverter, CC and battery. You only need to buy a DC pump. Look at the PIC if you may have interest in any...

Note: for option one you may have to consider your storage tank to be of large capacity so it can cover up for cloudy days.

thanks gents for the suggestions.
seems the dc pump is a better option. am wondering if anyone is running such, lemme tap from his experience.
2ndly is the pump easily available in nigeria? or aliexpress..hence the need to purchase 2 pumps, incase of 1 going bad

3rdly, can i hook it up directly to the solar panel, without battery?

4thly, if answer to 3 is yes, i am considering retaining the old inverter setup, however the output from the panels will be split into 2, one going to sumo...the other going to the CC of the existing setup

i wish to automate the whole system, with auto flow shut off, so the system will be independent of human input, as setup is in the village. a regulator will be installed in the tank to cut off power...when tank is full...and also activate power when the water gets to a certain level.

the water demand is minimal, say 200 liters daily, so a 2k liters tank shud last 1wk or so. borehole depth is btw 80ft to 130ft. most pumps are rated flow/hr like 2000ltrs/hr...or 30L/minute , can i simply divide by 24hrs to calc the hourly flow rate....abi the pump is designed to work 24/7??

AyarmBoye:
me I just need 1-2 minutes for me to shut down.. Lobatan...... But it won't even last 1 second... And battery nah new.. Don't think ups is charging it sef

ok, u can use a clamp meter to check if battery is charging?
2ndly, even though its new, the battery may hv sulphated /damaged while in the sellers shop. so you may consider buying a new battery, if you confirm ups is charging

Beep us today for Chargers, BMS, PCB for your LiFePO4 batteries of any capacity

earthrealm:


ok, u can use a clamp meter to check if battery is charging?
2ndly, even though its new, the battery may hv sulphated /damaged while in the sellers shop. so you may consider buying a new battery, if you confirm ups is charging

pm

earthrealm:
thanks gents for the suggestions.
seems the dc pump is a better option. am wondering if anyone is running such, lemme tap from his experience.
2ndly is the pump easily available in nigeria? or aliexpress..hence the need to purchase 2 pumps, incase of 1 going bad

3rdly, can i hook it up directly to the solar panel, without battery?

4thly, if answer to 3 is yes, i am considering retaining the old inverter setup, however the output from the panels will be split into 2, one going to sumo...the other going to the CC of the existing setup

i wish to automate the whole system, with auto flow shut off, so the system will be independent of human input, as setup is in the village. a regulator will be installed in the tank to cut off power...when tank is full...and also activate power when the water gets to a certain level.

the water demand is minimal, say 200 liters daily, so a 2k liters tank shud last 1wk or so. borehole depth is btw 80ft to 130ft. most pumps are rated flow/hr like 2000ltrs/hr...or 30L/minute , can i simply divide by 24hrs to calc the hourly flow rate....abi the pump is designed to work 24/7??

send pm

earthrealm:
thanks gents for the suggestions.
seems the dc pump is a better option. am wondering if anyone is running such, lemme tap from his experience.
2ndly is the pump easily available in nigeria? or aliexpress..hence the need to purchase 2 pumps, incase of 1 going bad

3rdly, can i hook it up directly to the solar panel, without battery?

4thly, if answer to 3 is yes, i am considering retaining the old inverter setup, however the output from the panels will be split into 2, one going to sumo...the other going to the CC of the existing setup

i wish to automate the whole system, with auto flow shut off, so the system will be independent of human input, as setup is in the village. a regulator will be installed in the tank to cut off power...when tank is full...and also activate power when the water gets to a certain level.

the water demand is minimal, say 200 liters daily, so a 2k liters tank shud last 1wk or so. borehole depth is btw 80ft to 130ft. most pumps are rated flow/hr like 2000ltrs/hr...or 30L/minute , can i simply divide by 24hrs to calc the hourly flow rate....abi the pump is designed to work 24/7??

Hit me up sir - 08168986461

ojeysky:


So I have been reading more about LFPs lately, it actually seems charging up to 14.5+ which is manufacturer max voltage may kill the battery faster. Charging to 13.8v (with float at 13.4 for those of us who are stuck with float settings) seem to be a sweat spot that is being suggested to put the battery.

But the DC out voltage of the provided charger is 14.8v (for a 12.8v nominal battery). So I suppose 14.8v charge will be okay.

Besides I noticed that the battery has more backup time when the max solar charging voltage gets to the 14.0v pre-set than if it stays at around 13.7v/13.8v on days that insolation is not maximum.

justcallmenuel:
Thank you God for giving me another year of life.
Thank you for the experience of this past year.
Many congratulations on my new year/age
May God give me an amazing, exciting productive and adventurous life that I really desire to have.

Cheers� to a new beginning and chapter of my life.....HAPPY BIRTHDAY TO THE CEO OF MANUEL SOLAR ENERGY ENTERPRISES!!!



Your wishes will be greatly appreciate, thanks.

HBD to the guy that brought up to the thread the latest competition in solar offerings.

Any promo for patrons from Manuel solar to mark the anniversary?

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BATTERY RACK 4 BATTERIES N 30,000
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simydan:


I quite agree with you in the sense that LFP doesn't really need to be charged 100% full.
Even at 14.4V it's still not at 100% that is why the BMS is very important to see that the battery doesn't achieve a 100% full charge, keeping it at 95% - 99% charged.

Its wise to keep your charge voltage under due to fact that your charging device may not have LFP charge function.

I just hope our LFP BMS are top notch to be able to save us from unforeseen situations that may arise due to mistakes or faulty chargers.

If you have opportunity to get a full charge is a plus since it's around 3.6V per cell and still very safe and doesn't affect battery life.

I think early death of the battery from overcharge rather than the risk of explosion is about the only fear we can have when it comes to LFP. I can't say the same for Li-on.

I have abused LFP to some extent without dire repercussions that I can have some confidence in the chemistry.

For want of longer back up, I have parallel a 40ah 12.5v nominal LFP and another 40ah 13.5v nominal LFP. That's sone serious voltage mismatch alright.

But it charges to 14.5v setting on the SCC and drops to 13.3v at sundown. After use for about 4 hrs, the voltage drops to 12.7v, it then gradually çlimbs up to 13.0v and remains there until about 5hrs when the second reduction begins.

My guess with that anomalous voltage trend is that the bigger 13.5v pack begins to charge the smaller 12.7 nominal explains the initial rise after the initial 4hrs 12.7v drop, after which the two batteries reach an equilibrium at 13.0v and then another drop cycle commences.

saint2ace:


Hello Ceaser how do you know when Ur bank is full? Been charging since yesterday and it's stuck at 12.7v.

By the way, got the cable and accessories from AliExpress, so far it works okay on my laptop but really doesn't last, guess my 18650 batteries are bad.

Anyone with good deals on original 18650 batteries.?

Bro, that stuff should not exceed 12.7v o. In fact the old one doesn't exceed 12.5v mark, but the newer ones reach 12.7v.

Also your backup time can only be comparable to the stock batteries that came with your laptop. This is because it is the same configuration as 3s2p that most laptops come with. Hence your backup from the power bank will roughly be the same as your laptop's, total backup of the two should be double.

Also the backup is a function of the battery capacity. I mostly have 2200mah 18650 batteries in my collection.

There is one guy on NL that advertised selling 18650. Will locate the thread.