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Maplin 12V Modified Sinewave 300W Inverter

Code: N66JU

Maplin 12V Modified Sinewave 300W Inverter is rated 4.1 out of 5 by 16.
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  • 300W continuous output to power a range of household appliances
  • Modified sinewave output
  • 240VAC mains socket to power a product without additional converters
  • 12VDC input power that can be achieved through either the car accessory socket or with the included alligator clips.
  • Weighs only 720g, its compact design (120 x 73 x 73mm) prevents it getting in your way in the car
  • 2.1A USB socket included to charge an additional device such as a Smartphone or Tablet
  • Shutdown protection against power overload

Product details

Maplin 12V Modified Sinewave 300W Inverter

• 300W continuous output to power a range of household appliances
• Modified sinewave output
• 240VAC mains socket to power a product without additional converters
• 12VDC input power that can be achieved through either the car accessory socket or with the included alligator clips.
• Weighs only 720g, its compact design (120 x 73 x 73mm) prevents it getting in your way in the car
• 2.1A USB socket included to charge an additional device such as a Smartphone or Tablet
• Shutdown protection against power overload

What is an inverter?
An 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 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. Inverters vary in capacity and can power devices of up to a specific wattage. Inverters can be split into two categories: pure sinewave and modified sinewave.

What makes this inverter unique?
This inverter can connect to the car battery through either the car accessory socket or directly using the included alligator clips while being positioned out of the way with its compact design. The inverter can power a device up to 300W such as a laptop or a phone charger or a portable games console. It is highly efficient, converting 90% of its energy into output power. It is fitted with a 2.1A USB socket to charge a wide range of items such as a Smartphone, MP3 player or Tablet while still keeping the mains socket available to power an additional item such as a battery charger. The inverter includes shutdown protection to power down the inverter if the battery power drops below a certain level.

What is the difference between pure sinewave and modified sinewave?
All household mains sockets output a sinewave along the cable to transfer power from the source, such as the battery or plug to the product that is plugged in. This product is a modified sinewave inverter which produces a stepped approximation of a pure sinewave inverter which makes it easier to produce. 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, such as these. A pure sinewave inverter is used to power sensitive electronic devices such as power motors, power tools, clocks or microwaves.

Specifications
Connector Car plug & battery clips
Cable length
Input voltage range 12 V
Standby input current: <0.6 A
Output voltage: 240 V
Output frequency: 50 Hz
Output power: 300 W
Peak output power: 900 W
Output waveform MSW
Efficiency 90%
Dimensions 120 x 73 x 73 mm
Weight 720 g
USB output 2.1 A
Low battery protection YES
Shutdown protection YES
Rated 4 out of 5 by from Just finished wiring this into my motorhome. It is to run the laptop, and charge phones, camera etc etc. Love having mains and USB charging. Running this lot, it runs gently warm, fan doesn't need to run; which is nice. Wanting to know the hit on my leisure battery consumption, I checked the "off" current - too small to measure and the "zero load" current - as per spec. One serious con though, why oh why does this one not come with flanges to screw it down - I did know when I bought. Yesterday was spent bending up and painting two aluminium "U" straps to go over the unit to hold it down. 25mm strip ali from B&Q, anneal it, bend to fit and paint. Remove lid of the inverter to drill holes to tap for steady-screws, clear all swarf and reassemble. All that for want of flanges. Nice compact unit.
Date published: 2012-07-08
Rated 5 out of 5 by from Just bought this in store; good value at the sale price. I wanted an inverter to use from the car cigarette lighter for my laptop on long car journeys when the wife is driving. My previous 75W inverter got overloaded. This one has automatic cut off; is 150W through the cigarette lighter socket, and has leads to attach to the car battery if you need 300W. This is a bonus to run your laptop, etc., from a portable car battery, which I can use at field shows where there is no electricity or you have to pay for electricity. The USB socket is a bonus. Maplin's store staff are excellent with their advice. I might have gone for another 75W inverter if staff had not explained the wattage issue. In the sale, this 300W inverter was as cheap as a 150W one. With two sets of leads (and spare fuses included), it is quite versatile. Instructions say that it cannot be used with fluorescent lighting, which is not mentioned by another reviewer who criticises this. It is about 15cmx8cmx8cm and is very quiet, compared to car engine noise. Its fan is quieter than another car inverter I have used.
Date published: 2013-06-20
Rated 5 out of 5 by from Dependable. Bought this after a small amount of research on short notice before a supporting role in a long distance cycling event. We had this up and running off the internally mounted battery within minutes running a laptop and charging gps/phones/cameras all through a 3 socket extension lead. Made for a perfect little base station, with the only niggle being the USB socket not being powerful enough to charge today's power hungry smart phones. Highly recommended, we had this running 18-20 hours a day for 5 days straight and the fan only came on a couple of time (hot weather made it warm in the van on occasions). Our little trip would have been alot more difficult without this little beauty.
Date published: 2014-07-06
Rated 5 out of 5 by from The unit is well finished, came with a choice of battery connecting leads which I wasn't expecting and, though I haven't yet tested it to full advertised power output, it works well on lower output demand and i have no reason to suppose it won't do everything I had in mind when I ordered it. I'm very pleased with my purchase.
Date published: 2013-01-10
Rated 5 out of 5 by from Very pleased with the Invertor and delivery was next day. My dealings with Maplin have been excellent so far.
Date published: 2012-01-20
Rated 1 out of 5 by from Never got it to work I've had a 150w inverter from Maplins and it works well and has done for many years. However this 300w version is a different kettle of fish. It kept repeatedly blowing the fuse or pulling the battery voltage down so low it wouldn't power up. I tried various combinations of batteries on my solar system, but still nothing. Have now got a brand new 110Ah battery and all I get is the green LED light up, no mains power and after a few seconds I either get a continuous tone or an intermittent from the unit.
Date published: 2014-04-17
Rated 5 out of 5 by from Great does the job very happy It is a great bit of kit would recommend. Does the job which is good
Date published: 2017-09-22
Rated 3 out of 5 by from This inverter is not suitable for Ipod 7th generation. It just will not work, mainly because there are no reference voltages applied to the signal leads, they are just left open circuit. Having looked at the circuit board it is not even easy to modify.
Date published: 2013-04-27
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Does this have a 240v lead to charge the internal battery /

Asked by: Jim1
unfortunately not no .
Answered by: darren cordon
Date published: 2017-09-22

Will this run the Lg Xboom 9730 Hifi speakers? I believe it is 180w required input, however before i do anything id rather feel safe asking you guys?

Asked by: James123
The item will be able to power loads of up to 300w.
Answered by: Dominic
Date published: 2017-09-16

Why does it keep beeping 4 times when turning it on for 1st time

Asked by: Aldred
It could be a flat battery or overloaded?
Answered by: Dominic
Date published: 2017-09-11

can i run a 40w television with this attatched to a power station 12v connection?

Asked by: Jamie
The item will supply up to 300w when connected to a 12v battery or source capable of the amps needed
Answered by: Dominic
Date published: 2017-09-05

I have a summerhouse that has no power source. Can I buy this to run a portable tv, if not what do you suggest?

Asked by: Lisa
This service is for frequently asked questions and does not allow two way communication, In order for us to best assist you with your technical issue please contact us on the details below: 0333 400 9500 or email technical@maplin.co.uk
Answered by: Dominic
Date published: 2017-08-29

Hey guys, feel silly for asking but would this work ok with a 2011 MacBook Pro? I can't imagine the MacBook draws tonnes but on the Apple charger it says: Input 1.5a 100-240 volts. My calculation = 360 watts max? Output is labelled + 16.5v 3.65a :/

Asked by: Paul W
The Macbook charger will only use 60 Watts so this would work fine with a Macbook charger
Answered by: Dale
Date published: 2017-08-23

Would this power hair straighteners And a air bed pump&nbsp;

Asked by: Kayleigh
as long as the items are less than 300w then yes
Answered by: Billy
Date published: 2017-08-16

How long is the cable on this product? I want to run it from a car battery into a tent? Thank you

Asked by: LeeH
This is about 0.5m.
Answered by: Dominic
Date published: 2017-08-14
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Bulk Prices

Item code Item name Quantity Price
N66JU Maplin 12V Modified Sinewave 300W Inverter (1+) £29.99

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