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How To Set Up A Standard Backup Power Supply With Lifepo4 Battery - Technology Market - Nairaland

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How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 1:06am On Nov 18, 2019
I'm most glad to start this thread as it is going to be an interesting and practical one...

I got tired of poor power supply by PHCN, coupled with the fact that I live in a house that is not metered and most tenants will fail to pay their power bill on time which eventually leads to the PHCN guys disconnecting our wire.

I have a generator that power's everything in my room including the AC as it's an INVERTER type but, the stress of going out at night to put on/off the Gen or on a raining day plus the cost of buying fuel every now and then made me thought of a backup inverter. If possible an off grid system, just to keep some of my basic appliances powered during outage or disconnect as the case may be.
So, I started my research and since I'm an electrical inclined person and an onliner who knows how to source for stuff's that may not be locally available, and since I needed a good system that no matter how small it would be but will worth it and deliver maximum satisfaction...

It was then I discovered the lithium battery tech and that they are superior to the well known inverter batteries around and then I discovered that they were of different types and more expensive than the traditional inverter batteries. This was where my problems began because I was running on a very tight budget but then I realized that a standard backup power is never cheap even when made with lead acid battery. As if that is not enough, I realized again that the super lithium batteries are not easy to come buy in Nigeria.

It was on this note I deepened my research and discovered that aside from the fact that these batteries have a lot of advantages to the other inverter batteries, like higher depth of discharge (DOD), longer cycle life of 2000-5000, less in weight and volume, higher charging voltage and current which result to faster charging with the term CC/CV ( constant current/constant voltage)...
I also found out that they are of different types and made up of different cells with the

1. Lithium polymer (lipo) being the first with individual cell voltage is 3.7v. These are cells used for cell phones batteries, laptop batteries, power banks and other portable backups and have a cycle life of 500-1000. They are mainly made from the 18650 cells

2. Lithium iron phosphate (lifepo4) with individual cell voltage of 3.2v. These cells are best used for larger battery set up for power backups and are more safer and more expensive to the 18650 3.7v cells, they have cycle life of 2000-5000. Lifepo4 cells are categorized into 32700, 32650, 38120, 40152...

3. Lithium titanate (Lto) with individual cell voltage of 2.3v these are very recent and far more expensive than any of the lithium battery. These cells are very rugged an can charge faster than you can imagine with a cycle life of 15000-25000

After having an in depth understanding of this battery tech I decided to settle for a lifepo4 battery for my inverter set up.
It is also very important to note that, since lifepo4 is not common and does not have the same characteristics as the traditional inverter battery we all know, their charging sequence is quite different as it requires a voltage of about 14.6v CV to charge and does not undergoes float charge like other batteries, with most inverters built in chargers designed with agm and other lead acid in mind it would be hard to charge a lifepo4 battery with these inverters except some inverters with the features to charge a lifepo4.
Proper care needs to be taken in terms of charging this batteries.

Because I'm a ware of this I decided to get a stand alone inverter and a stand alone charger.

This are the list if item I ordered for this project and because I want to keep it simple and cost effective I have to make do with what I can afford.

List of item's:
1. 600W pure sine wave inverter
2. 20a lifepo4 battery charger
3. 12v 100ah lifepo4 battery made from 32650 cells
4. Automatic change over switch (ATS)
5. Breaker's and cables

Since I'm still expecting these items I'll be stopping here and continue when all item's finally arrive then we can move to the next stage...

2 Likes

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by Talibanis: 3:38am On Nov 18, 2019
An interesting read. Front seat booked.
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 9:20am On Nov 18, 2019
Talibanis:
An interesting read. Front seat booked.
.

You're welcome on board. Sit tight and enjoy please feel free to contribute either by additional information or by asking questions...

Thanks
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by pointstores(m): 9:34am On Nov 18, 2019
We have in stock 18650 battery 3c and 1c capacity 2000mah - 2600mah
18650 battery holders in stock, battery BMS in stock and lots more
Laptop and phone powerbank in stock made in Nigeria
Inquiry 08166117634
Distributor for phone and laptop powerbank needed

1 Like

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by Ournolly: 9:50am On Nov 18, 2019
pointstores:
We have in stock 18650 battery 3c and 1c capacity 2000mah - 2600mah
18650 battery holders in stock, battery BMS in stock and lots more
Laptop and phone powerbank in stock made in Nigeria
Inquiry 08166117634
Distributor for phone and laptop powerbank needed
Are you the same as the op?
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by maxjax(m): 11:21am On Nov 18, 2019
when are you expecting your items?

pls do keep us posted

simydan:
I'm most glad to start this thread as it is going to be an interesting and practical one...

I got tired of poor power supply by PHCN, coupled with the fact that I live in a house that is not metered and most tenants will fail to pay their power bill on time which eventually leads to the PHCN guys disconnecting our wire.

I have a generator that power's everything in my room including the AC as it's an INVERTER type but, the stress of going out at night to put on/off the Gen or on a raining day plus the cost of buying fuel every now and then made me thought of a backup inverter. If possible an off grid system, just to keep some of my basic appliances powered during outage or disconnect as the case may be.
So, I started my research and since I'm an electrical inclined person and an onliner who knows how to source for stuff's that may not be locally available, and since I needed a good system that no matter how small it would be but will worth it and deliver maximum satisfaction...

It was then I discovered the lithium battery tech and that they are superior to the well known inverter batteries around and then I discovered that they were of different types and more expensive than the traditional inverter batteries. This was where my problems began because I was running on a very tight budget but then I realized that a standard backup power is never cheap even when made with lead acid battery. As if that is not enough, I realized again that the super lithium batteries are not easy to come buy in Nigeria.

It was on this note I deepened my research and discovered that aside from the fact that these batteries have a lot of advantages to the other inverter batteries, like higher depth of discharge (DOD), longer cycle life of 2000-5000, less in weight and volume, higher charging voltage and current which result to faster charging with the term CC/CV ( constant current/constant voltage)...
I also found out that they are of different types and made up of different cells with the

1. Lithium polymer (lipo) being the first with individual cell voltage is 3.7v. These are cells used for cell phones batteries, laptop batteries, power banks and other portable backups and have a cycle life of 500-1000. They are mainly made from the 18650 cells

2. Lithium iron phosphate (lifepo4) with individual cell voltage of 3.2v. These cells are best used for larger battery set up for power backups and are more safer and more expensive to the 18650 3.7v cells, they have cycle life of 2000-5000. Lifepo4 cells are categorized into 32700, 32650, 38120, 40152...

3. Lithium titanate (Lto) with individual cell voltage of 2.3v these are very recent and far more expensive than any of the lithium battery. These cells are very rugged an can charge faster than you can imagine with a cycle life of 15000-25000

After having an in depth understanding of this battery tech I decided to settle for a lifepo4 battery for my inverter set up.
It is also very important to note that, since lifepo4 is not common and does not have the same characteristics as the traditional inverter battery we all know, their charging sequence is quite different as it requires a voltage of about 14.6v CV to charge and does not undergoes float charge like other batteries, with most inverters built in chargers designed with agm and other lead acid in mind it would be hard to charge a lifepo4 battery with these inverters except some inverters with the features to charge a lifepo4.
Proper care needs to be taken in terms of charging this batteries.

Because I'm a ware of this I decided to get a stand alone inverter and a stand alone charger.

This are the list if item I ordered for this project and because I want to keep it simple and cost effective I have to make do with what I can afford.

List of item's:
1. 600W pure sine wave inverter
2. 20a lifepo4 battery charger
3. 12v 100ah lifepo4 battery made from 32650 cells
4. Automatic change over switch (ATS)
5. Breaker's and cables

Since I'm still expecting these items I'll be stopping here and continue when all item's finally arrive then we can move to the next stage...
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 1:48pm On Nov 18, 2019
maxjax:
when are you expecting your items?

pls do keep us posted


Hopefully before this month end but I'll be discussing the setup here before the item's arrive.

All parameters will be clearly stated with pictures and diagram before we go into the practical aspects and performance record of the system taken
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by iamjack0812(m): 2:06pm On Nov 18, 2019
pointstores:
We have in stock 18650 battery 3c and 1c capacity 2000mah - 2600mah
18650 battery holders in stock, battery BMS in stock and lots more
Laptop and phone powerbank in stock made in Nigeria
Inquiry 08166117634
Distributor for phone and laptop powerbank needed

Na them be this....should this on this thread Oga?
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by iamjack0812(m): 2:18pm On Nov 18, 2019
simydan:
I'm most glad to start this thread as it is going to be an interesting and practical one...

I got tired of poor power supply by PHCN, coupled with the fact that I live in a house that is not metered and most tenants will fail to pay their power bill on time which eventually leads to the PHCN guys disconnecting our wire.

I have a generator that power's everything in my room including the AC as it's an INVERTER type but, the stress of going out at night to put on/off the Gen or on a raining day plus the cost of buying fuel every now and then made me thought of a backup inverter. If possible an off grid system, just to keep some of my basic appliances powered during outage or disconnect as the case may be.
So, I started my research and since I'm an electrical inclined person and an onliner who knows how to source for stuff's that may not be locally available, and since I needed a good system that no matter how small it would be but will worth it and deliver maximum satisfaction...

It was then I discovered the lithium battery tech and that they are superior to the well known inverter batteries around and then I discovered that they were of different types and more expensive than the traditional inverter batteries. This was where my problems began because I was running on a very tight budget but then I realized that a standard backup power is never cheap even when made with lead acid battery. As if that is not enough, I realized again that the super lithium batteries are not easy to come buy in Nigeria.

It was on this note I deepened my research and discovered that aside from the fact that these batteries have a lot of advantages to the other inverter batteries, like higher depth of discharge (DOD), longer cycle life of 2000-5000, less in weight and volume, higher charging voltage and current which result to faster charging with the term CC/CV ( constant current/constant voltage)...
I also found out that they are of different types and made up of different cells with the

1. Lithium polymer (lipo) being the first with individual cell voltage is 3.7v. These are cells used for cell phones batteries, laptop batteries, power banks and other portable backups and have a cycle life of 500-1000. They are mainly made from the 18650 cells

2. Lithium iron phosphate (lifepo4) with individual cell voltage of 3.2v. These cells are best used for larger battery set up for power backups and are more safer and more expensive to the 18650 3.7v cells, they have cycle life of 2000-5000. Lifepo4 cells are categorized into 32700, 32650, 38120, 40152...

3. Lithium titanate (Lto) with individual cell voltage of 2.3v these are very recent and far more expensive than any of the lithium battery. These cells are very rugged an can charge faster than you can imagine with a cycle life of 15000-25000

After having an in depth understanding of this battery tech I decided to settle for a lifepo4 battery for my inverter set up.
It is also very important to note that, since lifepo4 is not common and does not have the same characteristics as the traditional inverter battery we all know, their charging sequence is quite different as it requires a voltage of about 14.6v CV to charge and does not undergoes float charge like other batteries, with most inverters built in chargers designed with agm and other lead acid in mind it would be hard to charge a lifepo4 battery with these inverters except some inverters with the features to charge a lifepo4.
Proper care needs to be taken in terms of charging this batteries.

Because I'm a ware of this I decided to get a stand alone inverter and a stand alone charger.

This are the list if item I ordered for this project and because I want to keep it simple and cost effective I have to make do with what I can afford.

List of item's:
1. 600W pure sine wave inverter
2. 20a lifepo4 battery charger
3. 12v 100ah lifepo4 battery made from 32650 cells
4. Automatic change over switch (ATS)
5. Breaker's and cables

Since I'm still expecting these items I'll be stopping here and continue when all item's finally arrive then we can move to the next stage...

Am presently in the same shit as your write up above.
Let me book a seat.
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 2:38pm On Nov 18, 2019
iamjack0812:


Am presently in the same shit as your write up above.
Let me book a seat.

Welcome onboard!!!
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 2:48pm On Nov 18, 2019
iamjack0812:


Na them be this....should this on this thread Oga?

@pointstore

As much as I hate to say this, please I'll appreciate if you allow us to achieve the purpose of this thread before you start making you market proposal...

Please be mature about this and be part of us with meaningful contribution as that will be highly appreciated.

Thanks so much @iamjack0812

1 Like

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by maxjax(m): 4:01pm On Nov 18, 2019
good cool

simydan:


Hopefully before this month end but I'll be discussing the setup here before the item's arrive.

All parameters will be clearly stated with pictures and diagram before we go into the practical aspects and performance record of the system taken
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by luvlyoracle(m): 5:08pm On Nov 18, 2019
Am all ears
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 6:04pm On Nov 18, 2019
For my load and my backup, since I'm on a budget I am trying to keep it very simple. So, I intend to power the following appliances:

67watts 32" led TV for 6 hours

18w Gotv decoder for 6 hours

100w refrigerator for max of 3 hours and

20w ceiling fan for 9 hours

Let's do the maths:

67×6=402w
18×6=108w
100×3=300w
20×9=180w

Total load:402+108+300+180=990w

Now my load estimate is 990watts

Since there's meant to be a loss of about 20% in the system which is 0.2

I now have
990×0.2=198w

Adding it to my estimated load of 990w
990+198=1188w

From the above, my total estimated load will be 1188watts assuming my system efficiency is 80% for 20% loss. But there's every probability that I might get an 85%-90% efficiency. Because stand alone inverters do well in conversion efficiency.

Now, will my inverter and battery do well on these loads put together?

Let's analyze it. My expected inverter is a 600w pure sine wave with a surge of 1200w and my battery a lifepo4 12v 100ah...

Total load at every given hour is:
67w+18w+100w+20w=205w

This means my total load per hour is 205watts assuming that I'm powering all loads at the same time. For a 600w inverter it will do excellently fine, since not up to 50% of it's power rating is being used.

For the battery: 12v 100ah will be
Watts=Voltage × Current
W=V×I ==== W=12×100
W=1200
Therefore, my battery power will be 1200watts.

Let's compare that with the total loads:
Total loads=1188w

How well will it perform:
Battery power - load power
1200w-1188w=12w

This simply means the battery will power all the loads at the said time comfortably with a 12watts still left in the system.

Hope we get a clear understanding on this... I'll be talking about the charging process and put up a sketch diagram of my connection and setup as regards the listed items for my project.

6 Likes 1 Share

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by shellliver: 10:45pm On Nov 18, 2019
Keep it up

Which 600w pure sine wave Inverter did you order?

Manufacturer please?
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 11:57pm On Nov 18, 2019
shellliver:
Keep it up

Which 600w pure sine wave Inverter did you order?

Manufacturer please?

Not a popular one that you know I bought it direct from the factory in China along with every other items listed earlier except for the breakers and cables.

Just for your curiosity, this are the pictures...

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by dayo8080: 5:30am On Nov 19, 2019
Very informative. Thanks for sharing. I am learning.
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 1:26am On Nov 20, 2019
Now for the charging system, since I'm not using an inverter with an inbuilt charger that's why I have to get a standard alone charger for lifepo4.

Note: an inverter with inbuilt charger and UPS function or a hybrid inverter is the ideal way to go but because I'm concern about the type of battery I'm going to use which is a lifepo4 battery, and due to the fact that very few inverters can effectively charge a lifepo4 battery, that's the main reason I went for a stand alone inverter (inverter with no ac input) and a stand alone charger (charger with specific charge sequence).

What is the pros and cons of my setup of separate inverter and separate charger?

Pros:
Better charging sequence for good battery management. Since charger is designed for the kind of battery in mind, so it will charge according to battery charge sequence there by extending battery life.

Improved inverter efficiency and performance since the inverter is built to only take in DC and convert to AC, which makes it simple and greatly increases the service life of the inverter.

The units don't go bad at the same time. This means that in case of a fault, only one unit will be affected and can be easily managed because individual units have simple build but all in one units have complex build so, it makes it more complex to fix faults.

Could be cheaper, less weighty and not too big too...

Con's:
Can not switch automatically except if an ATS (Automatic Transfer Switch) is installed in the system.

Installation could be a little complex.

Could be expensive, since a switching device needs to be included with a few more breakers.

It is very important to note that, when using a lifepo4 battery for your inverter setup always be concern about the charging of your battery as lifepo4 charges differently from the traditional inverter batteries you know.
Lifepo4 will do very well with many solar charge controllers for a solar setup but, always check for charging parameters of your charging device be it inverter, charge controllers or stand alone charger... Don't get me wrong on this; I'm not saying that, inverters with inbuilt chargers will can't work with lifepo4. I just want you to understand that lifepo4 does not undergo the 3 charging stages of Gel and other AGM batteries mainly; Bulk charge, Absorption charge and Float charge. All these three stages have different current and voltage sequence which does not work for lifepo4 which only understand the CC/CV charge sequence. This simply means it charges at a constant current (CC) and constant voltage (CV) from beginning to the end and the the charging stops automatically. No need for float as with other batteries.

I like to confidently say this, most battery problems arises from the charging system. In a nutshell, even a poor quality battery will last long if properly handled during charging.

We may need to take battery charging very seriously since it's the most expensive part of any backup system. I may not be too bordered about discharging as that is easily included in most inverters for battery protection. Charging a battery can be tricky due to battery parameters and specification, that's why proper care and attention need to be taken.
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by surrogatesng: 5:56am On Nov 20, 2019
Ok will be checking for update
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by talk2dre(m): 9:21am On Nov 20, 2019
Following
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 6:18pm On Nov 22, 2019
While I'm still awaiting arrival of my backup equipments, I have put down a sketch of the installation diagram to explain how I intend to do the connections.

2 Likes

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by surrogatesng: 6:38pm On Nov 22, 2019
nice
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by mahkanjuh: 11:18pm On Nov 29, 2019
Very informative......I am very excited about this, please..what is the total cost of all of these? Make I dey save money lil by lil
You didn't mention solar panel at all
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 7:21pm On Nov 30, 2019
mahkanjuh:
Very informative......I am very excited about this, please..what is the total cost of all of these? Make I dey save money lil by lil
You didn't mention solar panel at all

That's because I'm not adding Solar now so, that will be a topic for another time once this stage is through...
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by luvlyoracle(m): 9:01pm On Dec 02, 2019
What is the best setup for a 250watt load and prices
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 12:15am On Dec 04, 2019
luvlyoracle:
What is the best setup for a 250watt load and prices

Any setup from 1200w and above will do. The bigger the setup, the better and the more expensive...

Note: A 1200w setup requires a 12v 100ah battery and will power 250w load for 4hours

A 2400w setup requires a 12v 200ah or 24v 100ah battery and will power 250w load for about 8.5hours...

The bigger you go the better but the more you spend...
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 9:57pm On Dec 05, 2019
Hello house!

I have finally received my item's for my backup project. Currently planning installation testing...

If you're still here say Hi! cheesy

2 Likes

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by luvlyoracle(m): 10:23pm On Dec 05, 2019
Iiiiiiii
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by mahkanjuh: 11:30pm On Dec 05, 2019
Hi Hi
Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 7:30am On Dec 07, 2019
OK! These are my project package and the peripherals for installation

1 Like

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 7:32am On Dec 07, 2019
This is the battery pack and the AC charger

1 Like

Re: How To Set Up A Standard Backup Power Supply With Lifepo4 Battery by simydan(m): 8:57am On Dec 07, 2019
Installation was completed and testing in progress!

2 Likes

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