₦airaland Forum

HeavenlyBang:
LFP or Li-ion?

capnies:
Brothers please a pwm charge controller with lithium does it still require dc-dc converter attached to it

BigDickProblems:
I am from the future 😂

mctfopt:
This is how they give you those "unbeatable" prices in the market. They cut corners. Saw the video and I'm pissed. Why will they do that?

iraybuju:
I have sent you an email. Thanks

iraybuju:
Hi everyone, please does any one know any company who can do an installment payment for full industrial inverter installation ? Like they will install the inverter then my company will be paying monthly

abuzz33:
If your setup will not change much over the years, then go for something like:

- Welion Eco-2000 1600W 12V hybrid 80a MPPT inverter which allows you to panel up to 2000W and has 4000VA surge
- 5 x 400W Panels or 3 x 650W panels
- 25mm DC cables
- CWorth 300Ah 12V LIFEPO4 battery (3.84KWh)

But if you plan to expand later, go for a 24V or 48V inverter that can support a much larger solar array (6000W+). Why? You can always use it for multiple applications or sell it.

In terms of batteries which are expensive, save your money. Battery prices are crashing now with lithium oversupply and innovation. LIFEPO4 batteries are now around $100/KWh down from $120-150 in 2024 such that those companies that you see selling 5KWh batteries for N900K ($600) in Nigeria are still making profits.

With CATL about to start producing Sodium Ion batteries, the time is coming that batteries will cost $30 per KWh meaning a 5KWh battery will cost $150 or N225,000 naira and last 15 years.

What this means is that people should, if possible, plan for solar as MAINs with NEPA serving as backup.

dollarnaira:
Do care to share the brand?

BangaRice:
go ahead.

BigDickProblems:
According to BLUETTI, you can only use a max of 200Watts Solar input for this system. Now the question you should be asking is whether it supports usage while being charged. If it does support usage while being charged then you can do the maths.

Let’s assume you bought a 200watts panel that has a 75% efficiency i.e., 150Watts is the highest you can get from the 200watts. With 7 hours of daily sunlight (ideally), you can generate:
[b]150Watts × 7hours = 1050Wh
537Wh for the battery and 513Wh available for 7 hours of sunlight. [/b]
Meaning that you can charge the system and still use it for some light loads like charging your phone, laptop etc during day time.Practically, you can decide to put only a maximum of 50Watts load while charging the system with solar. Meaning that the remaining 100watts can be channeled to charge the battery full in about 6hours.

Additionally, from experience, I’d advise you don’t use the inverter/higher AC output during this time of charging. This is because, you’ll lose some power if you turn on its inverter, and this is due to conversion losses.

abuzz33:
Size your backup system according to your needs. A 12v inverter can support even a 15kwh backup system but can only pull up to 1500w at a time from it. But question you should ask is do you want to be pulling 125a from batteries in a 12v setup using 35mm cable or 31.2a in a 48v setup using 16mm cable?

Then to charge your 15kwh battery bank via solar you will need to buy lots of separate charge controllers.

Battery makers build sizes based on typical usage which is why you see lots of 100ah and 200ah 12v lifepo4 batteries suggesting much lower continuous loads (100-200wh) for 12v systems. The largest I have seen so far is a 310ah lifepo4 battery

https://www.ebay.com/itm/376327100934

So if you need 3.5kwh backup like the poster asked there are simpler 12v solutions that dont require paralleling 100ah or 200ah lifepo4 batteries. 310ah is almost 4kwh.

TSHIRT2:
From which vendor, do u sell or any one here that sell at that price

TSHIRT2:
Good day house, how many KWH of lithium battery can I get with about 1.8m

dollarnaira:
Which will you prefer?
50ah at 48v or 314ah at 12v?
Now compare this cost:
314ah 12v and 314ah 48v. Is cost the same?

Get me right, 48v is sweet but not cheap.

I won't say bc 48v is good then I will choose 50ah 48v over 314ah 12v. No b juju b dat? Ultimate goal is to inveter power abi?

Energy needs differs and upgrade is inevitable on any system.

My future upgrade is 4kw at 48v ( 1.5million for cells only). Fund might not be an issue for you. There are other things in life aside energy biko and not to talk of this "sweet" economy.

THE ISSUE WITH YOU IS THAT YOU SEE THINGS ONLY FROM YOUR POCKET ONLY.

My concerns go to those with basic knowledge in solar. What a pity?

Charley2020:
According to abuzz33's explanation, I should go for a 48v system since I need 3.6kwh of backup power. So, what do you recommend?

Max continuous load shouldn't be more than 500w (230 watts gaming laptop, fridge, TV, fan, DSTV, bulbs). The gaming laptop should use half of 230 watts when not playing games as I use it for work too. I excluded high power appliances that will only be used for short periods of time like electric iron, blender, etc. I have a non-inverter 1HP AC that will only be used when grid power is available.

Also, I won't use my laptop for 24 hours daily. I'll get tired of using it and turn it off for a few hours. The same applies to the TV. The fridge also uses less power after a few hours since it doesn't utilize as much power to maintain its current temperature as it does to reach it.

But let's just say it's 500 watts. What would you recommend, 12v, 24v, or 48v?

avatarg6:
Hello, I already have a BLUETTI EB55 Portable Power Station | 700W 537Wh. I want to attach solar panels to charge it and also use the extra solar power during the day to power minor appliances. Kindly provide insights what to set up

Charley2020:
Nah, I need a minimum of 3.6 kwh battery power. And since most people here don't recommend 12v systems, I don't want to go for that either. Thanks for the detailed response though.

mctfopt:
Bought this Elejoy in 2022.

Used it like 5 times

Still works though

BangaRice:
valid advise but the issue is the system is not mine. Owner just needs a inverter than can charge his battery from grid when available. I was hoping someone with a working idea of brand and model that does that will assist.

BangaRice:
Good morning fellow enthusiasts,
I need the most budget friendly inverter that can

1. invert 12V DC into 220v AC
2. Use Grid power to charge backup battery when available and switchover to solar when appropriate.

Th set up is just 300w panel, PWM controller and 100AH battery.

{PASTED AGAIN FOR ATTENTION}

favouredbymercy:
You were correct. I followed your lead and adjusted my charge controller parameters likewise. Reduced my bulk/float below balancing voltage, no more weird spikes in voltage.

Thanks Bro

Dam5reey:
The company should find my video and send original one.
I bought that toy for 52USD, na me go still correct what?

ask4bk:
Nna eh.
I ask WAEC question, you change am to JAMB question 😁😁🤣.

It'll only replace gen, meaning it's purpose is only to take up those hours when there's no nepa (let's say max 5 hours no nepa - but you can't trust nepa sha). They still intend to use nepa.
Forget the fridge watts, u can clearly see it's a mistake.
Assume that they'll be powered at same time.
Any where could be upgraded any time.

HeavenlyBang
Edrizz
dollarnaira

I was thinking at least 30kwh battery.
Its inverter to use that's cracking me head.

BangaRice:
Lol. You are funny.

I know both chemistry are different. I did long long ago. I am not an empty youtube gobbler of theories.

What i was trying to point out is that for you to build your 340 cells pack or equivalent, you do not compulsorily need 340 cells. lol. Instead you can use 6 cells of 46AH capacity in 3S2P configuration to achieve similar kwhr or whr accordingly. You just need bigger cells and that's what i pointed out to Tetralogyfallout. There is also 4680 of around 22-26AH pioneered by Tesla.

RickyM:
At the end of the day if all other factors are constant and total energy output over the cell’s lifespan is put into consideration…Cell with 8000 cycles @ 70% State Of Health total energy output during its lifespan is more than cell with 6000 cycles @ 80% State Of Health.

dollarnaira:
Baba try they communicate ooo .
Most of your expressions are too formal.
SoH
Inherently
Nudging

A simple term communicates better.

FEGEITOK:
According to a summary by AI: "For a user prioritizing the longest possible lifespan for a stationary energy storage system, Hithium's high-cycle-life cells may have an edge. For a user seeking a well-known, reliable brand with a proven track record in both EV and ESS, REPT is an excellent choice."

Still torn

What is the experience on this forum?

favouredbymercy:
Good evening

Please who has experienced charge controller giving extreme high voltage to battery when battery is full? The old Powmr controller with 2 Jinko 590w panels in series connected to it, gave a battery output voltage of over 39v on a 24v system triggering inverter error code 3 and 8.

Has anyone experienced this issue of controller giving out extreme voltage when battery full? What is the way out of this?

Thanks for your reply and happy new week to you.

bassdow:
well to be fair, it doesn't often happen at just first or 4 attempts. Also the duration, and Capacity of the Solar panel matters also.

Me don mistake before where I connect Solar panel to battery port.

You can't compare effect of 20pcs of 555-watts panels vs 4pcs of 300-watts panels. The effect would always differ.

Haven't had a bad charge controller via that method BUT it's something one needs be careful about whether you using quality brand or not

Dam5reey1:
Its still DIY, but you mean Lithium batteries, cause no one was doing DIY solar panels or inverters.

DIY battery is now expensive compared to ready made.

bassdow:
yea No be when dem Cut tree e dey die.

bassdow:
if you get money, and need quality brands, I would list them again. Quality brands dey wey no go disappoint you for a very very long time except life happen to you.

I'm very much aware there are a few unKnown brands / manufacturers that produces good things even if not as high as those somewhat pricey ones. High exchange rate don dey make some of us dey reconsider small small.
Might be frugal by default BUT I find it difficult skimping on quality.

meanwhile, Powmr no be better product. An epEver of 40amps can out Perform a lot of so called 80amps out there. How many people can afford to calmly disconnect their battery bank from the charge controller without first disconnecting the Solar panel. Yea I know it's discouraged but a lot of charge controllers no fit easily survive am, let alone when done regularly.

Mind you, I got 3 sets of epEver chargeController and the smallest among them is 40amps.