How many hours will a 150 Ah inverter battery last?

A 12 V 150 Ah battery stores about 1.8 kWh on paper. After keeping some charge in reserve for battery life and allowing for inverter losses, roughly 1.2 kWh reaches your appliances. That runs a 200 W load for about 6 hours, a 400 W load for about 3 hours and a 600 W load for about 2 hours. An older battery or a very hot room will give less.

Which is the best inverter battery for home use?

For most Bharuch homes with regular cuts, a tall tubular battery is the best balance of life and cost. Flat plate batteries cost less and suit homes where cuts are rare and short. Lithium needs no water and lasts the longest, but costs more and needs an inverter that supports it. The best choice depends on how often your power goes and for how long.

How often should I add distilled water to an inverter battery?

Check the float indicators every month in summer and every two months the rest of the year. Top up with distilled or battery water only, up to the maximum mark and not beyond. Never use tap or borewell water, because the minerals damage the plates. Tall tubular batteries need topping up less often than flat plate ones. Lithium batteries need no water at all.

What size inverter do I need for 4 fans, lights and a TV?

Four ceiling fans, six LED lights, a TV and a Wi-Fi router come to roughly 450 W. Divide by a power factor of about 0.8 and add some margin, and a 900 VA to 1,100 VA inverter fits. Pair it with a 150 Ah tall tubular battery for about 2.5 hours of backup at that load, or a larger battery if your cuts run longer.

Can I connect my home inverter to solar panels later?

A normal home inverter cannot take solar panels directly. You can either replace it with a solar PCU or solar inverter that charges the battery from panels, or keep it as it is and add a separate on-grid rooftop system for bill savings. The second route qualifies for the PM Surya Ghar subsidy. Most battery-only solar PCUs do not, because they run without a net meter.

Inverter Battery in Bharuch, Sizing a Home Inverter for 2026

The right inverter battery for a Bharuch home comes from two numbers, your running load in watts and the hours of backup you need. A 12 V 150 Ah battery stores about 1.8 kWh and delivers roughly 1.2 kWh to your appliances, which is about 3 hours at a 400 W load. We have sold inverters and batteries from our shop opposite Patel Welfare Hospital since 2003, and the sizing method below is the one we use at the counter.

Where this advice comes from

Active Solar House started as an inverter and battery shop. Rooftop solar came later. Over 22 years we have served more than 14,000 customers across Bharuch, Ankleshwar and the villages, most of them for home UPS systems and replacement batteries. We stock Microtek, Luminous, Exide, Amaron, Livguard and UTL, so as a home inverter and battery dealer in Bharuch we are not tied to one brand’s pitch. The best inverter battery for your home is the one that matches your load and your cuts, not the one with the biggest discount this month.

Most of the inverter problems we see are sizing problems. A battery too small for the load, an inverter running at its limit every evening, or a battery kept in a hot cupboard with no water. All three are avoidable before you buy.

Step one, add up your running load

List what you want running during a cut. Use the watts on each appliance label, or these typical figures.

Appliance	Typical running watts
Ceiling fan, regular	50 to 75 W
Ceiling fan, BLDC	28 to 35 W
LED bulb	9 to 12 W
LED tube light	18 to 20 W
LED TV, 32 to 43 inch	50 to 100 W
Wi-Fi router	10 to 15 W
Laptop	50 to 65 W
Air cooler	150 to 200 W
Refrigerator, running	100 to 200 W, with a start-up surge

A typical family load is four fans, six LED lights, a TV and a router. That comes to about 450 W with regular fans. Swap the fans for BLDC models and the same room runs on about 300 W, which stretches backup by half. If you are buying new fans anyway, this is the cheapest backup upgrade there is.

Air conditioners, geysers, irons and motors do not belong on a home inverter. They draw too much and will drain a battery in minutes.

Step two, pick the VA rating

Inverters are rated in VA, not watts. Divide your running watts by about 0.8 and leave some headroom so the inverter is not running flat out. For the 450 W family load, that gives about 560 VA, so a 900 VA to 1,100 VA inverter is the right size.

Many home inverters up to around 1,100 VA run on a single 12 V battery. Larger units, often 1,500 VA and above, typically run on two batteries at 24 V. Check the battery voltage of the model before you plan the battery bank, because it decides whether you buy one battery or two.

A refrigerator on the inverter needs extra headroom for its start-up surge. Tell us if you want to run one and we will size up.

Step three, battery Ah and backup hours

The battery sets how long the backup lasts. Here is the physics, so you can check any dealer’s claim yourself.

A 12 V 150 Ah battery stores 12 × 150 = 1,800 Wh, or 1.8 kWh. You should not drain a lead-acid battery flat, so plan on using about 75 to 80 percent of that, which is roughly 1.35 to 1.45 kWh leaving the battery. The inverter then loses about 10 to 15 percent converting 12 V DC to 230 V AC. What reaches your fans is about 1.2 kWh.

Backup hours are that usable energy divided by the load. The table uses 80 percent depth and 85 percent inverter efficiency.

Battery bank	Stored energy	Usable at the load	200 W load	400 W load	600 W load
1 × 150 Ah, 12 V	1.8 kWh	about 1.2 kWh	about 6 h	about 3 h	about 2 h
1 × 200 Ah, 12 V	2.4 kWh	about 1.6 kWh	about 8 h	about 4 h	about 2.7 h
2 × 150 Ah, 24 V	3.6 kWh	about 2.4 kWh	about 12 h	about 6 h	about 4 h
2 × 200 Ah, 24 V	4.8 kWh	about 3.3 kWh	about 16 h	about 8 h	about 5.4 h

Treat these as best-case figures for a healthy battery. Lead-acid batteries give less than their rated capacity when drawn hard, so a single 12 V battery at 600 W will fall short of 2 hours. An ageing battery and a hot room both cut the numbers further. If your cuts in the monsoon run four or five hours, size for that, not for a normal day.

Tall tubular, flat plate or lithium

We can supply all three. The right one depends on how your power supply behaves more than on budget alone.

	Flat plate	Tall tubular	Lithium (LFP)
Upfront cost	Lowest	Medium	Highest
Service life	Shortest	Longer	Longest, rated for many more cycles
Water top-up	More often	Less often	None
Deep, long cuts	Weaker	Handles them well	Handles them well
Charging speed	Faster than tubular	Slower	Fastest
Heat tolerance	Lower	Better	Good, with its own management system
Suits	Rare, short cuts	Regular cuts, most homes	Daily cycling, small spaces

Flat plate batteries make sense in parts of Bharuch city where cuts are rare and short. Tall tubular is what we recommend to most families, and to nearly every home in villages like Manubar, Tankariya and Dehgam where the feeder trips more often. Lithium costs more on day one but needs no water, fits in a small space and lasts the longest. It also needs an inverter with a lithium charging profile, so an old inverter often has to change with it.

Water, terminals and placement

A lead-acid battery lives or dies by how it is looked after. Check the float indicators every month in summer and every two months otherwise. Top up only with distilled or battery water, up to the maximum mark. Tap water and borewell water carry minerals that coat the plates. Bharuch borewell water is hard, so this matters more here than in many places.

Keep the terminals clean and dry, and apply a thin layer of petroleum jelly to slow corrosion. White powder on a terminal means it needs cleaning. Keep the battery on a trolley or stand, not directly on a wet floor, and in a spot with air movement. Batteries release small amounts of hydrogen while charging, so a closed wooden cabinet is the wrong home for one.

If your area rarely loses power, the battery can sit fully charged for months. Switching off the mains for a short spell once a month and letting the inverter run some load keeps the battery working.

Summer heat and your battery

Bharuch summers push room temperatures past 40°C in April and May, and a battery room under a tin sheet or next to a west wall gets hotter still. Heat speeds up the chemistry inside a lead-acid battery. It boils off water faster and shortens the battery’s life. A common rule of thumb is that sustained high temperatures can cut battery life sharply compared with a cool room.

Keep the battery out of direct sun and away from the kitchen. A shaded, ventilated corner on the ground floor is the best spot in most homes. Check water more often from March to June. If a battery starts bulging or feels hot to the touch while charging, switch it off and bring it to the shop.

When to move to solar

A home inverter only stores grid power. It does not reduce your bill, and it adds a little to it through charging losses. Once your DGVCL bill crosses about ₹1,500 a month, rooftop solar starts to make sense, and there are three ways to combine it with backup.

Keep your inverter and add on-grid solar. This is the cheapest route for most city homes. The inverter covers cuts as it does today. A separate on-grid system cuts the bill through net metering and qualifies for the PM Surya Ghar subsidy of up to ₹78,000. Our guide to what size solar system your home needs matches system size to your bill.

Replace it with a hybrid inverter. A hybrid runs solar, battery and grid together, keeps net metering and the subsidy, and gives backup from the same system. It suits homes with long cuts. The trade-offs are in our post on on-grid vs hybrid vs off-grid solar.

Fit a solar PCU. A PCU charges your battery from panels, with the grid as backup. It cuts grid use for the backed-up load, but most PCUs run without a net meter, so they do not qualify for the subsidy. They suit farmhouses and village homes where cuts are the main problem.

We also stock UTL, and our post on UTL solar in Bharuch explains which UTL product type fits which home. For the wider picture of solar across the region, start with our South Gujarat rooftop solar guide.

Why we do not print battery prices

Inverter and battery prices change with lead and lithium costs, brand schemes and GST, sometimes more than once a month. A price printed here would be wrong within weeks. What drives the price is simple enough. It is the battery type, the Ah capacity, the brand and the warranty period, plus the inverter’s VA rating and whether it supports lithium. An exchange of your old battery lowers the cost. Send us your load list and we will reply with today’s price on the models in stock.

Talk to us

WhatsApp your appliance list and how long your cuts usually last to 98241 95027, and we will reply with a sized inverter and battery and today’s price. If your bill is high enough for solar, check the calculator first. Or visit the shop at Mehfuz Complex, opp. Patel Welfare Hospital, Bharuch, Monday to Saturday, 09:30 to 20:00.