₦airaland Forum

This 10% limitation on NSE no be ham.....there has been no significant offer for total since yet no way of selling beyond the current N88. Psew!

NiyiOmoIyunade:
You want Oga Barezzi to spend 100k plus on a BMV to keep a max 20k battery topped off?

Perhaps since Grid and PV are always available connecting a suitable AC/DC converter (laptop charger) to the PV input of a PWM CC to keep the battery always charged is the leanest option. You basically want to max out existing resources and the incremental energy needed to keep the starter battery topped off is negligible so it can be on 24/7.

Odds are good that everyone has a 19.xxvolt laptop charger + el cheapo PWM CC sitting around unused and happy to be commissioned for this task.

There are even purpose built small wattage panels + PWM CC to perform battery maintenance but a custom solution is more reliable and stable I believe.

There will be many other things that the BMV will be used for as well apart from just that battery.....but yes you are right, but I did a disclaimer o

Barezzi:
I plan to do something similar on my genset starter battery (12Vdc 7Ah) to keep it healthy and charged as it runs once a quarter.
Options:
A. Get a Victron Orion 48v to 12v DC/DC converter and a timer to switch it on twice a month for 30 mins
B. Get an old laptop charger and connect it to the pv input of a charge controller. The same timer will switch on the laptop charger as above.
C. Replace the genset starter battery with Lithium equivalent and charge once a year.
D. Replace the timer switch above with a Victron BMV 712 from ojeysky and switch based on SOC or voltage.
E.

Any more suggestions will be appreciated.

I am conflicted on this but option D seem to give you more flexibility

ojeysky:
I have got 2 brand new BMV 712 with temp sensor for grabs. 125k each

Q/A
Is this the victron BMV 712 with Bluetooth features?
Yes
Is the price negotiable?
No price is firm Sir/Ma
Does the price include shipping?
No it doesn't, but I can waybill to any part of the country at buyer's cost.

Still available

icjunior:
My community has light supply 7pm to 8am everyday,so I need a small inverter I can use for atleast 8-10hrs when there's no light...I'm a corp member somewhere in Bayelsa so I'm looking for a good small inverter that can just charge my laptop,phone and Bluetooth speaker.

Any suggestions please?

That should be roughly 100w or less. You could get a small 500w inverter and a 150AH battery so that keeps things at 50% DoD

debeey87:
What is voltage bulk adjustable and where can it be increased? I use this type of inverter

Unfortunately I don't know about that particular inverter so can't advice but looking at the picture, am not sure it will have adjustable voltage option

ceaser:
I don't know why I keep stealing back glances at this Felicity lithium offerings knowing fully well that we've trashed out the overdeclared nominal capacities here. I pray greed will not take the better part of me.

Maybe it's because of my own supplier's price tag of 48/200 which is like 200k above the price tag of the Felicity's equivalent. I don already calculate what that 200k extra will add to my set up.

If the felicity actual capacity is 150AH/48V and not 120AH and if the cells are new then I think it's a good deal at that price.

Willie2015:
You invest in GT for cap appreciation..
GT moved from N21 to N26..
Dats a decent margin...
Zenith is dancing Skelewu ard 17
A wise man can invest the profit in Zenith again..
And still chop some nice dividend...

Make sense for the bolded, zenith is not a good one in that case

OBAGADAFFI:
I prefer Zenith .

Zenith is currently one of the cheapest stock on the floor.

+1 still strange why people will prefer gtbank over Zenith, especially for dividend hunters. Their return is usually similar yet zenith is cheaper per unit

Trippledots:
Boss, pls at what average C rate did you charge and discharge those zeniths with while they were in service?

I think he said they don't go below 12.5 per cell, that will keep SOC at 70% and above.

GeorgeD1:
lolz brother, tanx. i guess i was just stomped by the offer price when compared with what the actual market price
was supposed to be. plus the fact that all were brand new (in crates) as opposed to more common
fairly used telecoms batteries sold off as scrap by gsm base stations.

Bros I have a feeling you really got the batteries at a great deal that is way lower than the 130k a piece

Abdomox:
Good day all. I recently got two 220AH Luminous NRGT batteries (Tall Tubular) and my inverter indicates the batteries are full. When measured with voltmeter without load they jointly read 25.6V.

But when I put load on the inverter, and put on like 5 led bulbs, the volmeter immediately drops to 24.4V. I'm surprised in the sudden drop in voltage.

Is this normal or there is something wrong with the batteries.

Inverter is Luminous Hybrid also bought newly

Yes it is

dollarnaira:
Battery not charging bro
IT MUST READ ABOVE 25v at a start

It mustn't, it all depend on the charge SOC of the battery and the charging current

adrusa:
With my experience with Lead Acid and LFP, I will take 600AH LFP over 2000AH Lead Acid. I don't know the characteristics of this particular battery, but a 2000AH LAB does not give you 2000AH, maybe about 1000AH or a little more if your load is light.

It's c10 lead acid I think it may give close to the spec since one won't be doing up to 0.1C discharge concurrent; a typical household won't be pulling more than 200A @48v consistently. I think the battery gives 3500cycle at 50% so it's not the normal lead acid out there.

earthrealm:
ol boy. where are you getting your supply, abi u wan import am yourself. your main in jos is saying 1.5m for 48v 300ah lifepo4

Yeah am talking about direct import, my Jos guy would make profit on his investment na

earthrealm:
24 x 130k is 3.1m for a 48v 2000ah bank.
Incountry price of 48v 600ah lifepo4 bank is Abt 3m.
40 x 12v 200ah quanta = 48v 2000ah is abt 6m
I would take a 48v 2000ah lead acid bank over 48v 600ah lithuims.

Wish the batts came in 6v 2000ah, would be a lot easier and affordable for a 48v bank owner.
I wonder the price of 2v 1000ah

We've not factored in waybill as well, you will probably need a truck to move 48v 2000AH and also a large room space while with 3.5m max I can have a 48v 1000AH LFP in my car trunk

odimbannamdi:
Very pricey, indeed, for just batteries. But can one do 12v for starters? And does it use the normal inverter-panel models?

Most 12v inverters comes with 20/30A charging, so charging 12v 2000AH will require a number of multiple external chargers. Some of those external chargers do up to 70A or more @12v. Ultimately I won't think of trying it for 12v even if am gifted, I can make an attempt with 24v but it won't be optimal for a solar setup unless external charging is involved.

odimbannamdi:
I went through the link. The marketer was selling 6 pieces of the battery for 130k. If you factor in inflation and other things, it should now be about 200k. It is quite affordable...abi am i not getting something right?

Bros 1 2v @130k will be about 1.6m for 24v 2000AH setup.

debeey87:
The inverter is 24v DC.
My observation from the display info is that on generator, the voltage never gets to 24v. It keep fluctuating between 23-23.7v, frequency is higher than 50hz usually 51hz, mains supply is between 220-230v.

What can be done to fix the low voltage issue from the Gen. Could it be the size of the wire I am using for the supply?

Is the the voltage bulk adjustable? Maybe the voltage is set low you may need to increase the bulk and also check the float voltage as well. The other possibilities is that you've not charged the battery enough

Trippledots:
Hi guys,

Pls anbody knows if fangpusun charge controller can actually handle lithium battery.

It's on the manual, but I want to be sure oh since the manual is a copy of victron's own.

Certainly since it has adjustable settings

earthrealm:
Congrats Georged1. Super massive bank.
Surely an 8 digit something.
These are still lead acid batts, of the gel kind, not lifepo4..

Too bad 12v systems are usually puny and clumsy 6 x 2v x 2000ah would sure make a bank, to be envied by lifepo4 as c/10 wud still be a whooping 200amps

Using those monsters for a 12v setup will be a killer, your charger will be working round the clock o!

GeorgeD1:
lolz. in terms of space and weight, lithium rules obviously.
but those were the least of my worries when i was considering biting the offer.
for a cost to amp/hour ratio, it was a no-brainer for me because clearly the price
was better than anything on the market at the time.

specs says design life is for between 15 to 18yrs. i guess time will tell but if my zeniths
could last me almost 8yrs, i expect these to exceed that feat.

Fantastic something! Am interested in cost of each for any future deployments especially if they can be sourced locally.

GeorgeD1:
in conclusion, while i'm reluctant to change a winning team (obviously lead-acid has served me well),
i'm open to new technology and definitely lithium will have a major part to play going forward as a
next steps towards acquiring even more storage as i continue adding power guzzling creature
comfort equipment to the house.

2100AH of 48v wow! See storage capacity! yes lithium will be a hype in those kind of lead acid you've now installed but when it comes to equivalent in space and weight it will still be lithium. For the zenit batteries however I think luck and doing something right happened there. Let's think about it, there were not so much low quality/fake batteries in 2012.

However Bros I no envy you o, else this one go cost me multiple organs! But with this you should be set-up for another 10 years+ journey

BeardedTraveler:
Bro, how good is the GenPal?

Works fine just be sure to clean the filters periodically

queenfav:
Please guys,how can i stop my house from using PHED during the day even though there is power.It's now that the tariff has been increased by over 100% that they now give us light.I want to be using solar in day time and PHED at night.Can i put my changeover switch on neutral during the day to achieve this.I don't want my meter reading unless i want it to.

If your change over switch is from phed then yes but that means there won't be utility to charge the battery neither will there be utility to power your household. What kindly of inverter are you using? There are inverters that can be configured to use solar power first before utility power. If you don't have those kind of inverters then you need timer switch to alternate between utility and inverter power sources. I think @valto advertised some

PETERiCHY:
1759

Guinness movement is just one of the stocks that puts my account on deep red, the other one will ardova.... can't wait for opportunity to offload, especially the latter

Mcy56:
Price fall stabilized.
Some form of reversal sighted.......

* Zenith reversed from 16.05 early market dumping to 16.70/75 now.
* GTB turned from red to green already..
* Bids building up in the FUA....

Just observation....

C&I seem to be reversing upward with full force o

odimbannamdi:
Yes, folks here have been very very helpful in providing answers to questions from their wealth of experience, and we sincerely appreciate.

Regarding the emboldened? When does your harvest begin to exceed 20A? Is it when panel size exceeds 300W (going back to my previous calculation of 300w/12v) for a 12v system or when you battery bank exceeds 220ah?

Kindly expatiate. Thanks

The 20A is not a definite guage, generally If your Panel array is more than 500w I will advice you go MPPT it's just more efficient than pwm and you really want to utilize your hervest as your panel size increases.

BetaTechnicians:
My fear is, solar may become more expensive. Government may try to make it unattractive so that the power companies would have a market.

Right there is such a possibility especially in naija....I guess folks should stock up as much as possible. Perhaps another reason why getting LFP for now will be better for longer term planning

ojeysky:
I have got 2 brand new BMV 712 with temp sensor for grabs. 125k each

Q/A
Is this the victron BMV 712 with Bluetooth features?
Yes
Is the price negotiable?
No price is firm Sir/Ma
Does the price include shipping?
No it doesn't, but I can waybill to any part of the country at buyer's cost.

Still available

odimbannamdi:
Regarding question number 1. I asked same question here, but no one answered. So i went on a quest to get answers from Youtube.

There is a simple calculation: Divide the size of your solar panels by the voltage of your system. So, of you have a 600watts panel system on a 12v battery bank setup, you should use a CC with a minimum rate of 50A (600watts/12v)

Folks here are volunteers so don't feel bad Bro, you could have flagged the question again, am sure you got response to other questions in the past.

Now to the question, what you have stated is just for CC capacity calculations not MPPT Vs pwm the reason for that is that MPPT is more efficient and once your hervest starts going above 20A it's much better you get an MPPT CC instead.

funshyboi:
Thanks very much for the response
Please can you highlight the rough estimate to set up this system

And can this system power up a pumping machine

Hybrid 2kw 125k
380w X 4 panels 200k
Battery LFP 100AH 24v 300k or You do 2x200AH lead acid at 250k to 300k depending on brand

The above should power your machine for at least 3hrs on full battery. Double your battery and double your panel (with an extra external CC) if you need more backup time