isangjohnson:
Does anyone here have Victron bmv 712 smart battery monitor for sale?

Yes I still have a set(with battery temp sensor) for sale. You may check my previous posts in his thread for pics

microgiant:


Sometimes, I am just confused. What is the reason for the back and forth banter? Is it only Nigerians or it is the same world over. Someone posted is own opinion, suddenly it becomes a debate.

Most times people are advised to buy Lithium if they can afford it, otherwise buy LA while they plan for the upgrade in future.

May be the counter voices are dealers and are not happy with the reviews as it is not good for their business.

Yeah I do have a few cells for sale though I don't consider myself to be a cell dealer but if you believe that is why some of us here say these things about lithium that's also fine, we all should not have same opinion.

While Lithium remains the superior chemistry, let us not bash lead acid tech so much that we begin to put out incorrect info.

First off, all lead acid chemistries are not the same. As far as I know flooded batteries can safely accept charge at 13% of capacity so a 200Ah battery can take 26A easily with no trouble, AGMs can easily do up to 25% of capacity so your 200Ah AGM battery will take 50A no trouble.

If you are sized for typical 50% DoD then it should be possible to fill up your batteries in one solar day keeping within safe limits. Not to forget also that ideal sizing for offgrid lead acid battery is 3 to 5 days autonomy and if you are so sized, C rates stop being a problem.

bigrovar:


This brings to the next issue with lead acid. The charge rate of most lead acid is very low. My 9kwh tubular battery as a recommended charge rate of c20 which for my 200ah bank is 20A. My solar panel can deliver over 50A but my battery can only take 20A. Hence if I deplate battery down to 80% dod, it would take 2 sometimes 3 days to fully charge not because I don't have solar capacity but because my battery is inefficient and can only take so much charge.

Lead acid charge rate gets worse at absorption I have to suffer through 3 hours of absorption where current is tapered down to 10A sometimes 5A (even though my panels can push over 50A).

What all this means is that with lead acid especially flooded, you are limited sometimes not by your solar potential but by your battery ability to take charge.

Indeed the SG readings are only half of the story.

I had a US Battery bank - 16pcs of 6v approx 400Ah that ran beautifully for 18months plus before they croaked - I was charging them at about twice recommended amps.

The SG readings will be fine but the plates inside the battery will wear out and the battery start running hot (electrolyte boiling). As Jesus said in the good book 'when you see these signs then know ye that the end is nigh'

To use lead acid and especially flooded successfully, you have to oversize the battery bank relative to your average needs

Namzy:

Lol like I said it's just speculation because I doubt whether you've seen overcharging kill a tubular battery. You can check the health of tubular batteries using specific gravity which has been great so far. I'll definitely update come January 2023.
P.S my lowest SOC has been about 60% and according to my bmv battery monitor. My battery has been cycled once

Namzy:

Lol like I said it's just speculation because I doubt whether you've seen overcharging kill a tubular battery. You can check the health of tubular batteries using specific gravity which has been great so far. I'll definitely update come January 2023.
P.S my lowest SOC has been about 60% and according to my bmv battery monitor. My battery has been cycled once

On a condition that you won't stop pumping the "100amp". But how will I know?

@earthrealm can you drop your number so we can communicate

[quote author=bigrovar

I love your submission.
This is exactly the strategy I'm using with my 4 x 230ah tubular battery.
I've 100% confidence of making greater use of my battery while hoping to join lithium club in the nearest future.
Then, every controversies about it must have put to rest and the price must have come down.
Happy Easter Solar Enthusiasts.

Bishop NIYI.
The preaching section hit my heart this SPECIAL SEASON.
May God protect our investment as we hand over everything and ask Him to take over from where our knowledge stop.
Thanks

emyfine08:
@earthrealm can you drop your number so we can communicate

Skyhigh0455 at yahoo dot com

Telegram handle : sKyhiGh

isangjohnson:
[quote author=bigrovar

I love your submission.
This is exactly the strategy I'm using with my 4 x 230ah tubular battery.
I've 100% confidence of making greater use of my battery while hoping to join lithium club in the nearest future.
Then, every controversies about it must have put to rest and the price must have come down.
Happy Easter Solar Enthusiasts.

Price come down?

dollarnaira:


On a condition that you won't stop pumping the "100amp". But how will I know?

Lol obviously my panels can't generate 100amps and my loads also take up some amps as well. The highest I've seen from my monitor charging the batteries is about 45amps for luminous tubular 220ah and mind you with that amps I get to absorption faster which will drop said amps. Also the increased amps charging are for days my night loads are heavier than usual and the morning after has adequate sunshine, which isn't all the time. So I believe this 'experiment' will last a long time. Fingers crossed

[quote author=dollarnaira post=111961591][/quote]
Yes or new efficient affordable battery technology surfaces

Namzy:

Lol obviously my panels can't generate 100amps and my loads also take up some amps as well. The highest I've seen from my monitor charging the batteries is about 45amps for luminous tubular 220ah and mind you with that amps I get to absorption faster which will drop said amps. Also the increased amps charging are for days my night loads are heavier than usual and the morning after has adequate sunshine, which isn't all the time. So I believe this 'experiment' will last a long time. Fingers crossed

Ok oo
Was only quotating the 100amp u said u were pumping in but now that u are no longer doing 100 but 45A, no more 2023 monitoring.

bigrovar:


Thanks the way I install my panels reduces chances of short. Panels are actually paralleled at the combiner box (there is a positive combiner box and a negative combiner box) close to the charge controller. This way less amps are sent down the wire from PV. Downside is you get to use lots of wires.

what's the advantage of this combiner box

Valto:
not available at the moment. meanwhile, only lithium can do this.. 62A charge on a 100ah 12V Lifepo4 battery pack.

pls when will it be available?

Deluxe8000:
pls when will it be available?

not anytime soon. u can easily order it from Aliexpress

[quote author=dollarnaira

Price of things will come down from next year Dec.

Our next President will make life better for us.

isangjohnson:
[quote author=bigrovar

Then, every controversies about it must have put to rest and the price must have come down.
Happy Easter Solar Enthusiasts.

For 9ja, @ bolded seem to be far fetched with an always weak naira.

Perhaps "affordability must have improved" will be the better phrase to use.

isangjohnson:
[quote author=dollarnaira

Price of things will come down from next year Dec.

Our next President will make life better for us.

You had better wake up to reality.
Dollar will hit 700 soon.

Anyone with a 12v 100/150/200 panel for sale?
Thanks

Valto:
note: no:1, my cells are brand new grade A, not used/refurbished/salvaged.
no:2, lifepo4 lithium is not for everyone, u can always step in when u are ready.
no:3, real capacity lifepo4 lithium packs are not cheap, most of the ones in Nigerian market are not up to declared capacity and some are used cells.

Used cells are so much in China market. They just rebadge the cells to look like new.

That's why when chatting with them sellers, my first question is usually "it's this fairly used or never used?" Of course the price they are selling gives you an indication when it's "fairly" used. Some scammy Chinese sellers will still tell you it's new when it's not. But reading reviews helps in that department.

NiyiOmoIyunade:
While Lithium remains the superior chemistry, let us not bash lead acid tech so much that we begin to put out incorrect info.

First off, all lead acid chemistries are not the same. As far as I know flooded batteries can safely accept charge at 13% of capacity so a 200Ah battery can take 26A easily with no trouble, AGMs can easily do up to 25% of capacity so your 200Ah AGM battery will take 50A no trouble.

If you are sized for typical 50% DoD then it should be possible to fill up your batteries in one solar day keeping within safe limits. Not to forget also that ideal sizing for offgrid lead acid battery is 3 to 5 days autonomy and if you are so sized, C rates stop being a problem.

Absolutely, if you note I was referring to Tubular which seem to the the fad these days. Yes AGM has higher rate of charge discharge compared to Flooded batteries like the Tubular type. In fact in certain situation I do recommend an AGM battery over Tubular for this very reason. The are the closest to Lithium in terms of charge / discharge rate and efficiency.

As part of my system upgrade, I decided to use my Ipowerplus 5kva Inverter as a second charge controller and terminated the new array of 2kw to it. I would never have done this before now but I had to keep things within budget. The axpert MKS series of inverter which the Ipowerplus, Gennex and likes are based on has a known bug MPPT Bug which causes the inverter to switch to float early under certain conditions. The bug pretty much makes them completely unreliable and not fit for purpose because it has the potential to damage your batteries leaving it under charge.

In my research I noticed that the community around the axpert series released a custom firmware which fixes this bug and add more functionality to the inverter. One of the functionality is add is to make it more compatible with Lithium battteries. I flashed my inverter to these firmware and the result has been amazing. You can read more about this firmware and other important information about this type of inverter here https://forums.aeva.asn.au/viewtopic.php?f=64&t=4332

Good evenings, my inverter makes a buzzing/cracking sound inside anytime I put on my Panel breaker..

As a first step, check that all connections for PV, Battery and AC within the inverter are securely tightened - you want a firm mechanical connection but do not overtighten!

myrax7:
Good evening, my growatt inverter makes a buzzing/cracking sound inside anytime I put on my Panel breaker..

bigrovar:
As part of my system upgrade, I decided to use my Ipowerplus 5kva Inverter as a second charge controller and terminated the new array of 2kw to it. I would never have done this before now but I had to keep things within budget. The axpert MKS series of inverter which the Ipowerplus, Gennex and likes are based on has a known bug MPPT Bug which causes the inverter to switch to float early under certain conditions. The bug pretty much makes them completely unreliable and not fit for purpose because it has the potential to damage your batteries leaving it under charge.

In my research I noticed that the community around the axpert series released a custom firmware which fixes this bug and add more functionality to the inverter. One of the functionality is add is to make it more compatible with Lithium battteries. I flashed my inverter to these firmware and the result has been amazing. You can read more about this firmware and other important information about this type of inverter here https://forums.aeva.asn.au/viewtopic.php?f=64&t=4332

Yeah that old bug has been a pain, wonder why this has not been fixed with company firmware till date. When I used the MPP GK series I had this issue, unfortunately only the MK series (low VOC) had the custom firmware. My work around then was to use the SOC figures from my BMV to automatically control when the inverter should switch to float. It worked pretty well

Thanks � for the wonderful post being made to save this thread, if you might have noticed another solar thread on nairalabd is practically a sales thread no more contribution from other solar enthusiast anymore.

This thread seems to be the very last,with volumes of knowledge. I learnt a lot and still learning. Let us try and keep the flag up.

Limited stock! HURRY!!

Quanta 200a battery ..... 165,000 "2 units above" , 170,000 "unit price".

Starplus 220a Tubular battery ... 125,000

Index NXT 200a battery.... 180,000

Index 200a slim battery .... 180,000

Index 200a tubular battery .. 165,000

Multipower 200a tubular battery ... 145,000

Matrix 200a tubular battery ..... 130,000

Genus 165a expanded tubular battery... 115,000

Genus 200a graphite tubular battery .. 140,000

Genus 230a lead carbon Tubular battery... 155,000

The Ritar battery 200AH 12V is in stock, but the price has changed.

Ritar 200AH 12V battery .... 145,000

Ritar 150AH 12V slim ..... 130,000

Ritar 105AH 12V Slim ... 110,000

Ritar 100a block battery ... 105,000

Monbat 200a slim battery .... 190,000

CD Techno 12v 196a slim battery ....190,000

MERCURY BATTERY Available Now With One Year Warranty!

12v 100ahs Battery... 75,000.00

12v 200ahs Battery.. 140,000.00

12v 250ahs Battery.. Expecting


Schneider 850va 12v pure sine wave solar inverter .. 74,000

Schneider 1.5kva 24v pure sine wave solar inverter .... 94,000

All brand new with standard warranty!

Contact,
Smartcell global services
CALL ONLY:: 081-350-31951
WHATSAPP ONLY::: https:///2348170385620

HURRY! DISCOUNTED PRICE!!

NEW ARRIVAL!!!

BESTCOM SOLAR PANEL MONOCRYSTALLINE

Features :

High operating currents and voltages✅

Lower conversion losses✅

High performance as compared to conventional 72 cell PV Modules✅

More energy per Sq. meter of area✅

Better performance under shading✅

Performance norminal 12v - 24v DC for standard output✅

25 year performance warranty✅

170w poly .......... 44,000
180w mono ....... 46,000
280w mono ....... 67,000
350w mono ....... 77,000
460w mono ....... 96,000
550w mono ....... 110,000



For further enquiry/transaction;
Contact,
Smartcell global services
☎️ CALL LINE: 081-350-31951
WHATSAPP::::: http://.us/w/?c=a46ea5

Please can someone suggest a fast battery charger for my 24v battery. Thank you

ojeysky:
230AH New Eve cells available can sell in minimum of 8 units @75k each. Comes with Busbar, nuts and screws

Call/WhatsApp: 08035233535

Still available for sale

Sorry didn't respond all these while, turned out they only deal wholesale sellers.

isangjohnson:
[quote author=ojesymsym

Please, link me up through mail. I want to follow up your purchase.
Thanks