Need Help: UPS for home

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Deal Subedar
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Hi guys. I wanted to know how much it would actually cost to get a UPS installed for home and what kind of backup capacity I would need.

Stuff I want to run for 2-3 hours during blackouts:

1 PC : 350W
1 TV : 100W
5-6 LEDs : 100W
3 Fans: 200W

Total: 750W

I have no experience with this. So, any advice would be awesome.
Also do tell what UPS systems you use in your home as well.

29 Comments  |  
7 Dimers
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Deal Subedar
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u require at least 1000 VA ups assuming power factor as 0.8 (750/0.8 =937 VA ~ 1000).
Coming to the battery capacity, u need 200ah to run 750w for 2.5-3 hr.
Your load demand is 750w so , A 200ah 12 v vattery will provide you a 2400w(200×12) for 1 hr or 750w for 2.5-3 hr.

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Deal Subedar
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jesikumar wrote:

u require at least 1000 VA ups assuming power factor as 0.8 (750/0.8 =937 VA ~ 1000).
Coming to the battery capacity, u need 200ah to run 750w for 2.5-3 hr.
Your load demand is 750w so , A 200ah 12 v vattery will provide you a 2400w(200×12) for 1 hr or 750w for 2.5-3 hr.

How much would these cost?

And what brand should I look into?

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Deal Subedar
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G-Gowda wrote:

How much would these cost?

And what brand should I look into?

A 200Ah battery will cost u around 12-14k and about ups microtek , luminous are good brands. If u need a better look I would prefer luminous bcz it’s design is good, if not u can choose microtek. Overall u can get it in 18-20k.

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Deal Subedar
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jesikumar wrote:

A 200Ah battery will cost u around 12-14k and about ups microtek , luminous are good brands. If u need a better look I would prefer luminous bcz it’s design is good, if not u can choose microtek. Overall u can get it in 18-20k.

Just yesterday I replaced my PCs UPS battery, two 12V 7.5AH Exide batteries which cost 2.2k from the dealer. This seemed very expensive.

He also said 1250 VA microtek inverter with Exide 150 AH regular battery, he would fix it in home for 20k and that I was wasting money buying UPS batteries for PC. 2yr warranty for inverter, 3 yr warranty for battery. He said tubular batteries have lots of issues so he won’t recommend it for homes.

Is this worth?

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Deal Subedar
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G-Gowda wrote:

Just yesterday I replaced my PCs UPS battery, two 12V 7.5AH Exide batteries which cost 2.2k from the dealer. This seemed very expensive.

He also said 1250 VA microtek inverter with Exide 150 AH regular battery, he would fix it in home for 20k and that I was wasting money buying UPS batteries for PC. 2yr warranty for inverter, 3 yr warranty for battery. He said tubular batteries have lots of issues so he won’t recommend it for homes.

Is this worth?

Yes u can go for it. Self installation could be done if u buy the parts online separately but that’s not advisable. Instead u can go for 900VA to reduce cost. U can still turn on the loads up to 750w or u can restrict to 700w to avoid overload.

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G-Gowda wrote:

Just yesterday I replaced my PCs UPS battery, two 12V 7.5AH Exide batteries which cost 2.2k from the dealer. This seemed very expensive.

He also said 1250 VA microtek inverter with Exide 150 AH regular battery, he would fix it in home for 20k and that I was wasting money buying UPS batteries for PC. 2yr warranty for inverter, 3 yr warranty for battery. He said tubular batteries have lots of issues so he won’t recommend it for homes.

Is this worth?

I am sure you have some time to read this document as to why tubular batteries are better

https://www.sbsbattery.com/PDFs/SBS_WP_101_Batt...

I don’t even know why he would suggest not buying tubular batteries but my guess is maintenance/ventilation aspect.

Also look for some Inverter deal on amazon/flipkart (or local shops if they are offering better pricing) and buy a 200AH battery (I would prefer tubular battery). Buy the latest manufacturing date battery and make enquiries in 2-3 shops for a good price. You can ask some local electrician to do the connections. Try avoiding placement of the UPS in bed rooms (choose a well ventilated place). You might probably need a UPS stand too.

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Deal Subedar
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jesikumar wrote:

Yes u can go for it. Self installation could be done if u buy the parts online separately but that’s not advisable. Instead u can go for 900VA to reduce cost. U can still turn on the loads up to 750w or u can restrict to 700w to avoid overload.

Thanks bro.

+KG

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Deal Subedar
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rsai01 wrote:

I am sure you have some time to read this document as to why tubular batteries are better

https://www.sbsbattery.com/PDFs/SBS_WP_101_Batt...

I don’t even know why he would suggest not buying tubular batteries but my guess is maintenance/ventilation aspect.

Also look for some Inverter deal on amazon/flipkart (or local shops if they are offering better pricing) and buy a 200AH battery (I would prefer tubular battery). Buy the latest manufacturing date battery and make enquiries in 2-3 shops for a good price. You can ask some local electrician to do the connections. Try avoiding placement of the UPS in bed rooms (choose a well ventilated place). You might probably need a UPS stand too.

From what I read, tubular is way better and even maintenance is not much.

I should have looked at this at the start of Navarathri sales. Missed opportunity. Will keep an eye out for lower prices.

I am planning to keep UPS under the stairs outside. Its open space. Is that fine?

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G-Gowda wrote:

From what I read, tubular is way better and even maintenance is not much.

I should have looked at this at the start of Navarathri sales. Missed opportunity. Will keep an eye out for lower prices.

I am planning to keep UPS under the stairs outside. Its open space. Is that fine?

Outside should be fine if it is secure and no water issues. Hope the main switch board is in close proximity.

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Deal Subedar
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Although you have most requirements clear, think of those equipments you will run all at a time. I’m sure you will not run all the items you listed at the same time, so the load will be distributed and this way you can reduce the battery and inverter capacity.

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andromeda wrote:

Although you have most requirements clear, think of those equipments you will run all at a time. I’m sure you will not run all the items you listed at the same time, so the load will be distributed and this way you can reduce the battery and inverter capacity.

Not a good idea to calculate the UPS capacity assuming you would be running partial load. You need to assume that you would want to run everything together when you plan on UPS in case of a emergency. Yeah sure it might seem overhead but when building a single battery system the cost won’t be much when you buy a 200ah battery instead of 150ah battery. All other things would still remain same.

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Deal Subedar
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rsai01 wrote:

Not a good idea to calculate the UPS capacity assuming you would be running partial load. You need to assume that you would want to run everything together when you plan on UPS in case of a emergency. Yeah sure it might seem overhead but when building a single battery system the cost won’t be much when you buy a 200ah battery instead of 150ah battery. All other things would still remain same.

Agree. I consider certain additional percentage as headroom on estimated continuous load for the headroom. But I wouldn’t consider all the items on ups as continuous load. I’m sure op will find 200ah an overkill after a few months down the line.

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Deal Cadet
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You should try luminous inverter.. Now it depends on what city you live in for service coverage.

Now it comes as what are things involved in it :

1. Inverter
2. Battery
3. Wire or fitting to done at your meter or across house..

https://www.luminousindia.com/load-calc...or

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Deal Subedar
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jazz09 wrote:

You should try luminous inverter.. Now it depends on what city you live in for service coverage.

Now it comes as what are things involved in it :

1. Inverter
2. Battery
3. Wire or fitting to done at your meter or across house..

https://www.luminousindia.com/load-calc...or

@andromeda @jesikumar @rsai01

I researched about this more and found LFP – lithium iron phosphate – batteries are way better in efficiency.

Do you know any trusted sellers selling this in 100AH capacity in India?

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G-Gowda wrote:

@andromeda @jesikumar @rsai01

I researched about this more and found LFP – lithium iron phosphate – batteries are way better in efficiency.

Do you know any trusted sellers selling this in 100AH capacity in India?

Definitely Lithium batteries are efficient and at the same time bit costly. But I don’t think in India there are any trusted sellers yet. I had seen someone purchasing those batteries from china and making their own battery pack. If you can find a way to acquire those batteries you can make your own DIY battery pack (there are many DIY tutorials available and they are not hard). But for the price tubular batteries are still preferred till lithium batteries start being widely available in India

If you still want to go with Lithium batteries, try finding local supplier on Indiamart and personally visit those shops here in Bangalore and check them out.

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Deal Subedar
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rsai01 wrote:

Definitely Lithium batteries are efficient and at the same time bit costly. But I don’t think in India there are any trusted sellers yet. I had seen someone purchasing those batteries from china and making their own battery pack. If you can find a way to acquire those batteries you can make your own DIY battery pack (there are many DIY tutorials available and they are not hard). But for the price tubular batteries are still preferred till lithium batteries start being widely available in India

If you still want to go with Lithium batteries, try finding local supplier on Indiamart and personally visit those shops here in Bangalore and check them out.

Idk when India will get lithium batteries for consumer market.

It will give a strong fight to lead-acid batteries, especially the LFP ones.

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Deal Subedar
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G-Gowda wrote:

@andromeda @jesikumar @rsai01

I researched about this more and found LFP – lithium iron phosphate – batteries are way better in efficiency.

Do you know any trusted sellers selling this in 100AH capacity in India?

First things first, Lithium-ion based batteries need a separate charging profile where the traditional inverters/UPS cannot function. These kind of batteries need a separate inverter/UPS which for sure will cost you lot if they are commercially available.

In other words, you should not connect a LithiumIronPhosphate battery in place of a traditional lead-acid battery. If these batteries are commercially used for home UPS, any references are highly appreciated.

IMO don’t much fret on these. Go with a traditional inverter/UPS setup with tubular battery type. In case of any repair, you will have surplus of options in getting it fixed.

For your information, I’m contemplating over using a car battery(I hardly need 60Ah for my need) for home inverter. I have altogether different set of problem to deal with.

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Deal Cadet
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Have you thought of using renewable source

Sun air.

While Working from home and seeing so much youtube, I feel, We can do better job at using this free source. Initial. Cost would be there but it would pay off in long run…

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Deal Subedar
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andromeda wrote:

No karma(can’t give more) for guessing grinning

No worries bro. I’m assuming guess was correct!

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Deal Subedar
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pingpong wrote:

No worries bro. I’m assuming guess was correct!

ofcourse yes in my case…engineer by passion and profession

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Deal Cadet
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only unemployed or under-employed engineers in dd stuck_out_tongue

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Deal Subedar
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hsmhsm wrote:

only unemployed or under-employed engineers in dd stuck_out_tongue

rolleyes

aisa mat bolo jisko sunke dusre ko buraa lage
i’m sure there must be many millionaire dimers here who just come for a kick and sake of old friends

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Deal Cadet
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pingpong wrote:
rolleyes

aisa mat bolo jisko sunke dusre ko buraa lage
i’m sure there must be many millionaire dimers here who just come for a kick and sake of old friends

1 Dime = 0.013474 Indian Rupee
1 Million Dime = 1,34,740 Indian Rupee
So everyone except teens is a millionaire dimer stuck_out_tongue

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Deal Subedar
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hsmhsm wrote:

1 Dime = 0.013474 Indian Rupee
1 Million Dime = 1,34,740 Indian Rupee
So everyone except teens is a millionaire dimer stuck_out_tongue

Bhavnaao ko samjho vats… bhavnaao ko… sunglasses

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Deal Subedar
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andromeda wrote:

First things first, Lithium-ion based batteries need a separate charging profile where the traditional inverters/UPS cannot function. These kind of batteries need a separate inverter/UPS which for sure will cost you lot if they are commercially available.

In other words, you should not connect a LithiumIronPhosphate battery in place of a traditional lead-acid battery. If these batteries are commercially used for home UPS, any references are highly appreciated.

IMO don’t much fret on these. Go with a traditional inverter/UPS setup with tubular battery type. In case of any repair, you will have surplus of options in getting it fixed.

For your information, I’m contemplating over using a car battery(I hardly need 60Ah for my need) for home inverter. I have altogether different set of problem to deal with.

True.

Tubeless would be fine for my needs. But I was just wondering if I could get my hands on LFP batteries and try to do something with it.

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Deal Subedar
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G-Gowda wrote:

Yes, I’m an unemployed one cry

Oh bro cry Don’t worry keep the faith.
You will certainly be rewarded for hard work and talent.

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