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Maplin 12V Modified Sinewave 150W Inverter


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About this product


  • 150W continuous output
  • Power chargers, heaters and air conditioners
  • 240VAC mains output socket to power without additional converters

Product overview

  • 150W continuous output
  • Modified sinewave output to power chargers, heaters and air conditioners
  • 240VAC mains output socket to power a product without additional converters
  • 12VDC car accessory plug to power the inverter from the car battery
  • Weighs only 560g and its compact design prevents it getting in the way
  • 2.1A USB connection to charge an additional device such as a Smartphone or Tablet
  • Shutdown protection against power overload

Power your devices from a truck, car or solar panel
This Maplin 12V 150W inverter is a converter that connects to a sealed lead acid (SLA) battery that is usually connected to a car, a truck or a solar panel. The 150W inverter can connect to the battery either through a car accessory plug or by clipping directly to the battery. A mains powered device can then be plugged directly into the inverter’s AC socket. 

Energy efficient and safe to use
This 150W inverter connects to the car battery through the car accessory socket and its compact design allows it to be discretely positioned without being in the way. The inverter can power a device up to 150W, such as a laptop, a phone charger or handheld games consoles. It is highly efficient, converting 90% of its energy into output power. It is also fitted with a 2.1A USB socket to charge a wide range of items such as a Smartphone, MP3 player or Tablet. The inverter includes shutdown protection to power down the inverter if the battery power drops below a certain level.

Power your laptop, printer or charger
A modified sinewave inverter can power devices such as laptops, printers and chargers, although some items may pick up interference from the inverter. A solution for this is to upgrade to a pure sinewave inverter. A pure sinewave inverter is used to power sensitive electronic devices such as power motors, power tools, clocks or microwaves.

Rated 5 out of 5 by from Having had a bad experience in the past with an inverter used to charge my laptop from 12V (distorted mouse movement and sound) I was somewhat sceptical about buying a relatively cheap product with a modified sine waveform. I have to say that I am very impressed! The unit is quiet, solid and stays relatively cool even after hours of usage with a 90W laptop adaptor. Top product and if combined with a laptop and mobile internet dongle gives you internet access anywhere, any time, consistently and for my work purposes, it's been a saviour, and incredibly useful where an iPhone screen simply hasn't been big enough!
Date published: 2011-02-07
Rated 5 out of 5 by from Excellent invertor, it does what it says on the packet. A 240v ac suedo-sinewave 150w output which is suitable for most low power mains equipment. I have yet to try it at near full power, but it just sits there without any buzzing or excess heat, in fact the only time it became warm was when it was in the sunshine! I got what I bought and I am very satisfied. I shall now complete my project to make a self sustainable portable mains supply for which I shall be using other Maplin products.
Date published: 2011-06-20
Rated 4 out of 5 by from Excellent product when it works. I bought this unit to charge up my MacBook pro in the car and initially I was very impressed. I plugged it in to a dedicated power outlet in the glove compartment which was rated at 120W and it charged up my laptop with no problems after approximately 1 hour. The next time that i went to use it, i though that i would use a normal cigarette socket in the centre console instead as that was easier to access, but after 15 mins, the unit started to bleep and was too hot to touch. I don't know whether it has to be used in a dedicated power socket or not. but i'll see it there is any difference once this unit cools down.
Date published: 2017-05-18
Rated 5 out of 5 by from Really great little inverter, much lighter and more compact than I expected. Have only used for mains phone charger so far, but stayed very cool and no fan noise.
Date published: 2011-08-23
Rated 4 out of 5 by from I race remote control bikes and travel around the country to different race tracks. this product is brilliant. I get to charge my batteries up and also with the USB ports keep my phone charged. even plugged my laptop to give it a charge. Also comes in handy when I am camping. Great product. small and easy to use.
Date published: 2010-12-22
Rated 5 out of 5 by from Used it to charge up our mac laptop and it works a treat. Most satisfied. Small neat and effective.
Date published: 2011-09-05
Rated 5 out of 5 by from A convenient and useful tool for low consumption items
Date published: 2012-03-25
Rated 5 out of 5 by from exellent bought this inverter to run a 70w tv off my lorry's 12v cigar lighter outlet, the truck has 2 12v batteries making a 24v system so plenty of battery power is available . I ran the tv for about 2 hours for the first time last night without the engine running don't quite know how long it would run before it wiped my battery power out so as not to start the truck in the morning any body who knows this please reply as i also run my night heater as most truckers do on cold nights, but for the first try out it seems to have done ok .
Date published: 2015-01-13
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Sinewave Type:

Modified Sinewave

Operating Specifications

Output Power:


Peak Output Power:


Input Voltage:


Input Current:


Output Voltage:


Output Frequency:


Dimensions & Weight










Cable Length:



USB Output:


Product Specifications

Low Battery Protection:


My inverter continuis to bleep in my truck then cuts out why

Asked by: Kenny
This suggests 3 things, low battery, over heating or over load. To diagnose which one please follow the information found within the manual. The manual can be found in the downloads section on the products page.
Answered by: Brad
Date published: 2018-01-12

Would this product be appropriate for powering my cordless drills charger for charging batteries in the feild. The charger runs of the mains and the batteries are 18vold and 36volt if thats of relevance.

Asked by: OliS
as long as the charger does not exceed 150W this would be fine.
Answered by: Dale
Date published: 2017-11-21

Could I connect this to my car and then an extension cable to a strobe light? 

Asked by: Ezzy
If the light is less than 150W.
Answered by: Dominic
Date published: 2018-02-16

Can I charge this via UK mains?

Asked by: mooky 7
No, this is not how the item works, this item connects this to a large 12v battery to convert 12v to 240v.
Answered by: Dominic
Date published: 2017-08-29

Will a 12v 150w inverter be ok for my 19 inch tv

Asked by: Mike
If it's less than 150W draw on the item it should be okay.
Answered by: Dominic
Date published: 2017-07-24

Could I run my lawn mower from this?

Asked by: Smiffy73
This would not be suitable as for a device such as a lawn mower with moving parts would require a Pure Sinewave inverter to operate. We would also need to know the energy requirements of the lawn mower before we could advise.
Answered by: James
Date published: 2017-04-13

Is there any way to acquire the schematic for this product or equivalent? I'm building this type of device for my college project and due to the dangers involved with converting 12v DC to 230V AC I would like a safe schematic to work from. Thank you.

Asked by: SMac
Unfortunately, we are unable to provide a schematic for this item. Please note we do offer full support for any products purchased from Maplin.We don't offer any assistance with design projects due to the dangers involved and would urge you seek advice from a professional such as a qualified electrician.
Answered by: Dominic
Date published: 2017-03-20

Looking for it for my TVs in hgv lorry would it be enough 

Asked by: Dougmac
Unfortunately we are unable to guarantee full compatibility for this item in your intended application I am sorry for any inconvenience this may cause you.
Answered by: darren cordon
Date published: 2017-02-04
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