Inverter installation: is it possible to install inverter for a single room in the house?

YES, so easy to change wiring. If whole room controls is from one point then that would be even more simple. Like 15-20 mins job. Total load for example 750watts X Number of hours(4) = 3000÷battery voltage(12) = 250 AH(Battery capacity). Since you don't find large tubular battery get 200AH one. I can vouch Amaron for its quality in tubular battery, you may also consider luminous.

Don't get exide.

For Inverter, get something with sinewave copper inverter that comes with ups mode. For example 880VA inverter would bear 550watts load(65% of VA). So get 1400VA inverter that would need only 1 battery. Few models need 2 qty of 12V battery.

I am in slightly different scenario but here is my take, As @maverickreborn mentioned you can easily power single room with an inverter if you have a single MCB for a room then it is just changing couple of wires (I used to do that for my other room). Secondly his claim of bad Exide batteries is spot on, in last 4.5 yrs I've changed 3 of them and now couple of days back my setup is completely dead. (2kv microteck inverter is giving overload warning, One of the Exide battery is dead another is on verge of death) So Yes, please avoid Exide batteries. Now I'll have to buy full setup so called few numbers and one of them offered 34k+gst for Livguard setup (2 tall batteries 150Ah (3yr replacement warranty) + inverter) Another one said 37.5k for Luminus setup (Inverter - 11.5k, 150Ah batteries - 13k each, 200Ah batteries for 15k each). In your case 13k for a single battery + 6~7k for inverter

nitin_g3 said:

Is it possible to go for a single battery now and add another later (when enough funds collected) with a 1400VA inverter?

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No, Single battery inverters won't work with 2 batteries (12V) similarly 2 battery inverters won't start with a single battery (24V).

Sorry Nitin bhai for highjacking your thread
@maverickreborn What would you suggest in my case? I am also considering Amaron batteries this time and have to make a decision today

Get only sine wave inverter and the coil should be copper with ups mode.
Two types of inverter system you will find on 1400VA models: one battery system of 12V type (or) two battery system of 24V type(2 qty of 12V battery needed).

Whether you can able to add additional battery with single 12V battery inverter !? - technically possible by connecting them in parallel (NOT RECOMMENDED - you need extra high sqmm copper wires, possibility of short)

Rough idea of pricings and recommendations:

Inverter Brands that you will find in market: Vguard, Exide, Amaron, Microtek(easily available brand that comes with aluminum windings, only very few models comes with copper windings - just caution) 1400VA Copper comes around 7.5 - 8k

Battery: Get Tubular battery from Amaron or Luminous(get only inverfast model, bit pricey)

In 2020 Oct, i get 200AH Amaron for 14K, price of 150AH was 12.5k and now 165AH(best selling variant than 150AH for amaron) itself costing 14.5 - 15k

Final Suggestions:

To Nitin: Get any inverter with 1400VA with copper windings and ups mode + get one 165AH amaron battery. (Considering not long power cuts as you mentioned)

To Kartik: Yes, get Amaron 165AH batteries.
Amaron are still best in business. Tech from Johnson controls with easy free warranty claims (RMA ).

nitin_g3 said:

So the Liv guard and luminous equally good?

And 6-7k for a 1400va inverter, right?

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If both have same price then I would pick Luminous also go with tall tubular batteries only. I have used Luminous single battery + inverter (1650W) for 5yrs and it was an amazing experience. but do check Amaron batteries as my relatives who have a family busibness of transportation mostly prefer Amaron batteries for truck and busses.

nitin_g3 said:

And 6-7k for a 1400va inverter, right?

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Just checked and these 1400va inverters are in 10k range my brother bought one last year for 6~7k but it was 800W something

Check this video, very good practical experiment

May be this this is off topic for this thread but since you are buying a new inverter, I just wanted to put a word of caution regarding the AMC.

The vendor who installs the inverter will usually push for an AMC which covers inverter repairs and quarterly maintenance/refills for the battery.
My vendor quoted Rs.2000 for the AMC which is not worth for an inverter which costs Rs.6-7k.
Later he offered just the battery maintenance/refills for Rs.800 annually.
If one can check the water levels regularly and clean the battery yourself, AMC can be skipped.

150 ah at 500watts will give about 3-4 hours.

I would choose Exide GQP model, its slightly expensive but atm is the only inverter which offers copper transformer.. also you should be able to get the Exide 200 AH battery for about 15000 locally it has a 36+24 warranty and i've seen them last 7-8 years easily.

Model names: Exide GQP 1125VA
Battery: Exide IMTT2000 26+24 warranty

If you cant find the inverter let me know.. i have a relative who has a battery shop, i should be able to get one for you at a decent price.. the battery however cant be shipped so that you'll have to get locally.