NiyiOmoIyunade:
What kinds of inverter and LVD settings have you used boss?

The terminal voltage of a 12v lead acid battery is about 10.5v - there are cycle life vs DoD charts that tell us how many cycles a battery will do at X% DoD.

It is clear that a lead acid battery will do worse in cycle life vs Lithium at deep discharges - that does not make it impossible to abuse the lead acid battery within it's 1 hour rating.

NiyiOmoIyunade:
Actually the backup time is in the range of 20 to 25 minutes when you load a healthy fully charged 100Ah battery with an 100a load.

Rough math - with a Peukert coefficient assumption of 1.3 - a 100Ah battery at C20 has capacity reduced to 40-41Ah at C1

..... pertinent to note that the balance of Ah capacity in my rough math above was not lost, if you give the battery time to recover and the internal chemical processes to balance out, you can draw more energy from the system esp if you reduce the rate of discharge to normal limits....

AndroBlaze:


Well if my years of experience of living with LA in the real world is not testing them, I wonder what is.

Anyway, as the goal here is for all of us to learn the easy way (through experience prefeably than experiments that are costly)... I am sharing another video with more "English" and more expensive LA batteries used apparently....but its still the same findings which is consistent with what we LA users live with and know.

Not as easy and simple to follow as the other video, but still points to the same thing, which if I can use Ojesky's word,"LA batteries will not perform magic" no matter how expensive.

So I still stand by the claim earlier, "you cannot get 120A from a 100AH LA for 20 mins or anything close to that in real life use".

Obviously we await your test or any other test debunking this.


https://www.youtube.com/watch?v=iy3hga_P5YY&feature=youtu.be

Elcapitan0:

Please help me shed some light on this.
I have a battery and a 1.1kv inverter for just my security lighting and i want to upgrade to 4 batteries(220AH) lead acid batteries soon. Can i use a 24V 3.5Kw inverter with those 4 batteries or should it be 48V inverter? And what about the charge controller? Will 60A CC suffice?

microgiant:


Boss, I am not an expert on the subject. The ogas are coming to respond to your questions.

NiyiOmoIyunade:
This is a good one boss. Solar don epp me in many ways.

Made me go look at my own solar yield stats;

Jun 2020 to Dec 2020 > 8.4Mwh
Jan 2021 to Dec 2021 > 13.9Mwh
Jan 2022 to June 2022 > 7.1Mwh
Deye PV yield inception to date > 4.1Mwh

Our service provider vends electric at about NGN80 per Kwh - although I do not use grid so not too current - what shows as grid in my setup is a mix of Gen and my 8kw Deye inverter which feeds into the Victron AC In #2 as the grid supply.

2022 is missing about 2 months of data because I took the GX offline for some integration experimentation with various Chinese BMS used in LFP packs

zeestone99:


Hello ekdc

gadgetplanetng:


Series and parallel connection

4 batteries in series (voltage adds up) 48v 200AH

Make 3 rows of that then connect all in parallel (current adds up) so 48v 600ah

NiyiOmoIyunade:
What SPDs are you buying?

A lot of the el cheapo SPDs actually offer very little protection and with a lightning hit, you get only one chance.

The 1st level and primary protection is the quality of your protective earthing, everything else depends on that, the job of the SPD is to limit the voltage rise the downstream equipment sees by rapidly shunting any faults to the earth.

The 1 meter rule is to achieve best chance of protection in case of an induced surge by placing the SPD as close to the protected device as possible - 1 meter is a lot of space in an electrical enclosure and I see no trouble meeting it.

If especially exposed or at risk, you can do tiered protection cascading several SPDs all the way from possible point of fault incidence to protected device.

Overall I tell people to focus more on proper low resistance earthing and ensuring all energy generators and processors properly connected and not obsess too much over SPDs.

See below a decent SPD I use all the time - note the length of the factory supplied cable.

samnaija:


My brother mecury

samnaija:


Look at it these way 12 batteries of (12v 200ah).
You will series 4 of the batteries this now gives you 48v 200ah bank. When you series voltage goes up.

Now do the same for the remaining batteries, you will have 3 different banks each 48v 200ah in value.

Now you will parallel the 3 battery banks each (48v200ah) together .

Now in parallel your capacity or ah of your battery increases so eventually end up with 48v 600ah single battery bank.

TechGeek777:


Thanks bro, understood!

NiyiOmoIyunade:
Ssssshhhhhhh!

Don't let big brother NERC hear you o - before they come and ask me to pay for Genco license.

I nor get money o

ojesymsym:
I believe a properly sized capacitor can also do this, can't it?

TechGeek777:


https://me3energy.ng/batteries.html

https://invertermall.com.ng/product-category/batteries/

https://swiftermall.com/34-inverter-batteries

https://www.solarkobo.com/shop

Expert in the house over to you. Please help highlight suspicious site here, and also advise on genuine ones here by arranging them in appropriate order!

zeestone99:


Any idea of the inverter charging current, d charging current wouldn't matter if you have a properly sized pv array.

Elcapitan0:

I have no idea sir.

NiyiOmoIyunade:
This is a good one boss. Solar don epp me in many ways.

Made me go look at my own solar yield stats;

Jun 2020 to Dec 2020 > 8.4Mwh
Jan 2021 to Dec 2021 > 13.9Mwh
Jan 2022 to June 2022 > 7.1Mwh
Deye PV yield inception to date > 4.1Mwh

Our service provider vends electric at about NGN80 per Kwh - although I do not use grid so not too current - what shows as grid in my setup is a mix of Gen and my 8kw Deye inverter which feeds into the Victron AC In #2 as the grid supply.

2022 is missing about 2 months of data because I took the GX offline for some integration experimentation with various Chinese BMS used in LFP packs

durodee:
My answer to "who solar epp?" My usage in 18months. I wonder how much it will cost me to achieve same with generator?

NiyiOmoIyunade:
Perhaps you should upsize your cabling between the SPD and main panel to counter the extra length - it would have been easy to put the SPDs close by if you had planned for it from the get go.

Do you have the MCOV and Clamp Voltage rating for the TOMZNs? This will give you an idea what level of protection they promise and you can then test using a high voltage generator (such as used for electric fences) whether the SPD is clamping any voltage at all.

The Midnite SPDs are rated for Type 1 and 2 usage I think.

TechGeek777:


Thanks bro, understood!

ojeysky:


This is something we could group buy on if it can fit naija human sizes(not the portable Chinese human ) ...the main challenge though still be maintenance since there won't be a service center nearby.

sethtsadopp:


I am assuming alot on the side of your cost of set up but based on my very very rough estimation, wouldn't it take you close to 20 years to break even compared to if you were buying this energy for the public supply (grid)?

TechGeek777:


Experts in the house, abeg make una look into this.

NiyiOmoIyunade:
Ssssshhhhhhh!

Don't let big brother NERC hear you o - before they come and ask me to pay for Genco license.

I nor get money o

samir101ng:


If una only know the amount of regulators & players in this forum eh !!

Dem full here boku.

I no go name names sha