On this page, you will find out how many watts a water purifier draws.
Water supplies virtually everywhere in the world are contaminated in some shape or form. Unless you’re drinking from a freshwater spring, you’ll find various chemicals in your supply. One way to clean up your tap water is with an electronic purifier which now uses multiple features. Of course, with a countertop appliance like this, you’ll need a power supply. If you’re keen to know the power consumption or want to use it off-grid then you can easily find out.
Below we will discuss and test water purifier wattage, explain how to work it out for yourself, and calculate the total electricity required.
How Many Watts is a Water Purifier?
The average water purifier uses between 30 to 60 watts.
The exact number depends on the size and model of your water purifier. For example, a modern tankless purifier can use 50W or more. While a slower tank integrated option can draw as little as 30W.
These are very low-powered machines which need electricity to run a water pump to pass water through a filter. This means you can run them almost anywhere with little electricity cost. The only thing to be aware of is if your machine includes a boil function which could spike wattage to 1500W when heating up.
If you’re worried about energy usage then you could also opt for a cordless battery powered purifier.
How to Find Out Your Water Purifier Wattage
There are 3 ways you can work out the wattage of a water purifier.
- Check Product Specification
The quickest way is to look at the water purifier’s specification. The watts (W) are usually written on a sticker on the base of the appliance. If not, you can check the user manual or the manufacturer’s website for technical details.
- Use a Wattmeter
A wattmeter is brilliant for getting a live wattage reading and tracking total energy usage of any appliance. You can simply plug it into your water purifier to get instant information.
I used one to test my water purifier which gave a live reading of 34W when in operation.
- Wattage Formula or Calculator
If you know the amperage and voltage of your water purifier you can use this to find the running watts. Simply use the formula Amps x Volts = Watts. Or you can head over to the ‘Watt Calculator’ to work this out.
Water Purifier Wattage Examples
Let’s take a look at specific examples of how many watts a water purifier draws. Below is a collection of modern water purifiers with their listed power ratings.
| Water Purifier Model | Power Rating (Watts) |
| SimPure Y7 UV Countertop | 60 |
| AlcaPure Reverse Osmosis Countertop | 30 |
| OnliPure Countertop | 30 |
| Eureka Forbes Purifier | 40 |
| Moonbow Water Purifier | 50 |
| Kent Ace Mineral | 60 |
As you can see, the power ratings vary between different water purifiers. So you should take the time to check your own appliance.
How Much Electricity Does a Water Purifier Use?
You can use water purifier wattage to work out how much electricity it uses. Plus this can be useful in understanding how much it costs to run your water purifier.
A watt (W) is a measurement of power at a single point in time. A watt-hour is the total amount of electricity used in an hour. For example, a water purifier drawing 30W would use 30Wh when running for an hour.
Happily, electricity bills are recorded in kilowatt-hours (kWh). A kilowatt is simply 1000 watts. So a 1000W water purifier running for 1 hour uses 1kWh.
In reality, you use a water purifier for 15 minutes a day. That’s how long it takes my machine to fill its tank. This means a water purifier uses about 7.5Wh or 0.0075kWh electricity a day. That’s 0.225kWh a month and 27.3kWh a year.
That’s a rough electricity cost of $4.10 a year to purify your water every day.
Using a Water Purifier Off-Grid
If you’re planning to use your water purifier in an off-grid situation like a power outage, RV, boat, or semi-truck, the information above is important. It enables you to pick the correct power products and work out your run time.
You can either use a power inverter, portable power station, or generator to produce AC electricity.
To make sure everything runs smoothly you should check two things on this equipment – wattage capacity and total energy capacity.
Your power source, like an inverter, should have a wattage capacity of at least 20% more than your water purifier. This ensures it will be able to deliver enough power as they are never 100% efficient. To purify water, you will need at least 75W of power capacity.
Secondly, you need to ensure your energy source, like a battery, has enough energy to run the water purifier for the required amount of time. As we already know, it will use about 7.5Wh of electricity to fill a purifier’s tank. This is the equivalent of 0.6Ah on a 12V battery.
How Many Watts Does a Water Purifier Use Summary
You should now understand how many watts a water purifier uses.
These are very low-powered appliances that require very little electricity to operate. You can purify water every day for less than $5 a year. Adding to this, if you want to have one in your RV then you won’t need to worry about depleting your deep cycle batteries. If you’re still trying to cut your power draw then take a look at a battery powered jug.
