Power inverters offer a convenient way to keep many of our electronics and electrical tools that need grid-like power when camping, in an RV, or off-grid working when all we have with us is a battery supply.
Even when you have a rugged and reliable inverter, it is important to know what appliances can be connected for the appliance to work properly and also to prevent damage to the inverter.
So this guide will let know which appliances you can connect to the 750 watt inverter, what to check if you are unsure if it will work with the inverter, and also provide power and battery information to help you use the inverter reliably.
What will 750 watt Power Inverter Run?
A 750 watt power invert can power an electronic and electrical appliance(s) provided that both:
- the combined power consumption of the appliance does not exceed 750 watts of continuous power, and
- the inverter surge power rating usually 2 -3 times the maximum power rating of the inverter is not exceeded .
Check the inverter’s owner manual or nameplate for both its continuous and surge power rating. The surge power is important for inductive loads like fridges, ACs which can have a considerable power draw at startup.
Example list of appliances that can be powered by the 750 watt inverter (List is not exhaustive)
- LED TVs
- Selected coffee maker
- Some fridges
- Mini fridge
- Some power tools like drills
- Selected water pumps
- Cellphones and tablets.
Some inverters have USB outlets and USB appliances may be plugged directly into the USB ports instead of the AC outlet for charging or powering.
Appliances that will likely not work with the 750 watt inverter
Larger capacity fridges, AC conditioners, heating appliances such as kettles, water heaters generally draw more power than the 750 watt inverter can supply. Always confirm the power requirements for the appliance before connecting to the inverter.
4 Things to Check Before Connecting Appliances to 750 watt Inverter
There are several key checks on both the inverter and appliance that should be made to prevent accidental damage to either the inverter or the appliance.
# 1. Does the appliance need a pure sine wave inverter supply or it can work with a modified sine wave supply?
Manufacturers of sensitive appliances, for example in the medical field like the CPAP machine, recommend power supply from pure sine wave inverters.
Pure sinewave inverters are also recommended for appliances with windings such as fridges, microwaves – they run cooler and quieter.
# 2. Check that the appliance’s continuous and surge power rating does not exceed what the inverter can handle to prevent damage to the inverter.
# 3. Confirm that the appliance’s voltage requirements can be met by the inverter. Is the inverter output 110V AC? Then you can only connect appliances that use 110V!
# 4. Confirm the inverter DC voltage requirement. Is it a 12 volt or 24 volt inverter?
Supply the inverter with the manufacturer’s recommended voltage to prevent damage to the inverter (when the inverter voltage rating is exceeded) or the inverter may not work (voltage is lower than what the inverter requires).
Danger Signs | When not to Run an appliance on 750 watt Inverter
You should disconnect the appliance, switch off the inverter and investigate the cause first before continuing to use it if you observe any of the following:
Overload alarm on the inverter. This may be a fault with the inverter or a case of high power draw requirement of the appliance.
Confirm that the inverter can meet the appliances’ power requirements
If the inverter is extremely hot or shuts down because of excessive temperature (temperature alarm is triggered), you need to let it cool down first.
Check that the inverter is installed in well-ventilated areas before switching it on.
The inverter fan is running noisily. In this case, the inverter may not be able to cool down properly leading to a shutdown.
Check that the inverter does not have worn-out bearings or there is no dust buildup in the fan and inverter interior before continuing to use the inverter.
How to Safely Run Appliances on the 750 watt Inverter
To safely run appliances on the inverter:
- Make sure the inverter is installed in a well ventilated area.
- Do not exceed the inverter continuous and surge power rating or the appliance(s) will not work properly and you risk damaging the inverter.
- Confirm how long the inverter can run at maximum power. Some inverters may only be able to run at their continuous power rating for a limited time, an hour or less.
Whenever possible, run the inverter up to 80% of its full rating.
For a 750 watt inverter, for example, aim to connect appliances with a maximum power draw of 600 watts (80% x 750 watts)
How Many amps Can a 750 watt Inverter Draw?
A 750 watts power inverter can supply a maximum current of about 62.5 amps at 12V DC. If it is a 24V inverter, then it will draw about 31.2 amps at peak power.
How Many amps Does it Handle?
A 750 watts can handle a maximum current draw of about 6.25 amps by appliances connected on the 110V side at peak power.
Beyond this, the overload alarm will be triggered and the fuse will blow.
Number of Battery and Sizes to Use to Run Appliances on the 750 watt Inverter
How many batteries to use with 750 watt inverter?
The number of batteries to connect to your 750 watt inverter depends on the time (hours) you plan the appliances to run for.
You can consider connecting 1 x 100 Ah or 2 x 100 Ah deep cycle batteries with a recommended depth of discharge of 50%.
How long will a 750 watt inverter run on battery?
This basically depends on the combined consumption of connected appliances and the battery capacities (Ah) used.
For example, with connected appliances consuming 750watts,
- a 100Ah AGM or GEL battery with a recommended discharge of 50% will provide a runtime of about 48 minutes
- a 200Ah AGM or GEL battery with a recommended discharge of 50% will provide a runtime of about 1hr 36 minutes .
If the appliance load is less than 750 watts, the runtime will be longer.
The 750 watt inverter can meet the power requirements of several light to medium power household electronics and electrical items like TVs, fridges, or selected capacities and other appliances provided it can supply their continuous and surge power requirements are not exceeded.
If you can, aim to run the inverter to 80% of its capacity and make sure it is installed in a well-ventilated area for it to perform reliably.
For the consistent and reliable performance of the inverter and appliance, check that the appliance’s voltage requirements can be met by the inverter and whether it is designed to work with grid-like power from pure sine wave inverters or otherwise before plugging the appliance.