Power conversion losses from converting 12v DC battery power to 230v AC mains power in an inverter uses about 10% more power than the actual appliance draws, so expect around a 1540w draw from the battery (1400w x 1.1 = 1540w).

How much power does a 12V inverter use?

For a 12 V inverter such as a Mass Sine 12/1200, consumption will be 400/10 = approx. 40 amps. For a 24 V inverter, say a Mass 24/1500, the corresponding figure is 400/20 = approx. 20 amps.

How long will a 12V battery last with an inverter?





Chart – How long will a 12v battery will last with inverter

12v Battery size with 500W inverter Estimated Backup time AGM or lead-acid battery 50% DOD limit Estimated Backup time lithium-ion battery 100% DOD limit
100Ah 1.2 hours 2.5 hours
120Ah 1.5 hours 3 hours
150Ah 1.8 hours 3.7 hours
200Ah 3 hours 6 hours

How much current does a 12V inverter draw?

​For a more accurate calculation of battery current: Divide load watts by actual battery voltage, this will be in the range 12-14V (24-28V). Then to allow for inverter efficiency, typically 85%, divide the figure by 0.85. Thus: For a 300W load at 12V….300 ÷ 12 ÷ 0.85 = 29.4 Amps.

How long will a 12 volt battery run a 1000 watt inverter?

How long will a 12 volt battery last with a 1000 watt inverter? A 12 volt 100Ah deep-cycle battery with regular depth of discharge 50% would run a fully-loaded 1000 watt inverter for 34 minutes.

How long will a 12 volt battery run a 1500 watt inverter?

A 1500 watt AC Power Inverter will run for approximately 16 hours based on the 200 amp hour rating of your 12 volt battery.

How many 12V batteries do I need for a 1000 watt inverter?





Battery Size for 1000 Watt Inverter. For a 1000 watt inverter, you’ll need at least a 100Ah battery. Anything smaller than this and you will run out of energy very quickly.

How many 12V batteries do I need for a 3000 watt inverter?

For a 3000-watt inverter, the number of batteries you need depends on their amperes per hour. For example, the average car battery has a 50Ah rating. If the battery banks you want to purchase are also 50Ah, you will need six of them for a 3000-watt inverter.

How quickly will an inverter drain my battery?

If you leave your inverter turned on with no load attached, the average draw from your batteries will be 1 amp per hour; 24amps per day; or 168 amps over a week. The simplest solution to this is to just turn the inverter off when not required as the battery drain then becomes zero.

What size battery do I need for a 1500W inverter?

Battery Bank Size Calulations

Inverter Size Typical Battery Bank Size (12V)
1000W 420Ah
1500W 540Ah
2000W 750Ah
2500W 1000Ah


How long can a car battery run a 2000 watt inverter?

If you max out the inverter at 2000 watts, you are pulling 2000 watts /12 volts = 166.6 DC amps per hour. If you use a 200-amp 12-volt battery, you would divide the 200-amp battery / 166.6 amps = 1.2 hours of run time. This is if you plan on fully depleting the battery, which we DON’T recommend.

Can you run an inverter off a car battery?

Keep the inverter away from anything that releases flammable gases. Connect an inverter only to a car battery or remote terminals, never to your vehicle’s cigarette-lighter adapter or an AC power source. Although the cigarette-lighter adapter is 12-volt, it can’t supply enough current to run the inverter.

How long will a 12-volt battery last with a 400 watt inverter?



12 Volt Battery Chart

Inverter Dual 8D
Watts 400
50 Stereo System 80 HRS
100 27′ Color TV 40 HRS
200 Computer System 20 HRS

How long will a 100Ah battery run an appliance that requires 3000w?

Table: Running times for various AC loads

100Ah deep-cycle lead-acid battery with AC loads with inverter – 50% recommended discharge
Load (watts) Run time (hours)
100 watts 5.16 hours
200 2.58
300 1.72

How many batteries do I need to run a 2000 watt inverter?

Typically two batteries are needed for a 2,000 watt inverter like the part # 34278156 that you referenced.

How long will a 100Ah battery run an appliance that requires 400W?

100Ah battery will run a 400W appliance for 3 hours.

How long will a 12 volt battery run a refrigerator?



In general, a 12V-50Ah battery can run a 2 cubic feet 12V fridge for 35 to 50 hours before it’s completely depleted. A 10 cubic feet RV refrigerator can run on the same battery for only 10 to 15 hours. However, it’s important to note that: Batteries should not be fully discharged.

How long can a 100Ah battery run a TV?

In general, a 12V-100Ah battery can run a 32-inch LED TV for 24 to 30 hours before it is completely depleted. The same 100ah battery would only run a 50 inch LED TV for 15 to 20 hours before it is fully discharged.