3000W 12V low frequency pure sine wave off-grid inverter (peak power 9000W) - 4Boats

3000W 12V low frequency pure sine wave off-grid inverter (peak power 9000W)


  • Dispatched in 2-3 days
  • 30 Day Return Policy
  • In stock, ready to ship
  • Backordered, shipping soon
Our stock levels are dynamic and can change frequently. If a product appears to be in stock, it may have already sold out. Please contact us if you have any questions about availability. Thank you for your understanding.

Regular price£649.99
Tax included.

3000W 12V low-frequency, pure sine wave inverter with an in-built 90A battery charger, and a peak power level of 9000W.

What is an inverter??ÿ

An inverter is a device which converts battery output (DC, or direct current) into 230V AC mains electricity (alternating current). 230V AC is the type of electricity supplied by utility companies to run standard domestic appliances?ÿsuch as?ÿa TV, fridge, radio, lights or to charge a laptop / mobile phone etc.?ÿIf you have a battery, connecting a power inverter will enable you to?ÿpower household appliances in areas with no access to mains electricity; such as in a motorhome, caravan, boat, farm or any other?ÿremote location. Inverters are also perfect for off-grid and back up systems for accidental power cuts.

This is a pure sine wave type of inverter, which means that the 230V AC output harmonically follows a smooth sine wave and is almost identical to normal mains electricity. Pure sine wave output is?ÿfar superior than square sine wave or modified sine wave output for running appliances. This is because:

- It is?ÿsuitable for a broader range of appliances (modified sine wave inverters can not power for example, appliances with electric motors)
- It is more efficient compared to modified sine wave inverters.

What is a low-frequency inverter?

Low-frequency inverters have a few advantages?ÿcompared?ÿto?ÿhigher frequency inverters; namely their peak power capacity and their reliability. Low-frequency inverters can operate at a peak power level of?ÿup to 300% of their nominal power level for several seconds, while high-frequency inverters can operate at 200% of nominal power for a fraction of a second. Low frequency inverters operate using transformers (as opposed to electronic components such as MOSFETs for high frequency inverters). This results in a stronger, sturdier inverter which is less prone to damage. If you would like to learn more about low frequency inverters, check out?ÿour article Introduction to low frequency inverters.

Key features include:

  • A fast built-in battery charger (with charging current options ranging from 18A to 90A)?ÿto charge your batteries from mains, with advanced 4-step progressive charging and several battery types to choose from. If required, the battery charger can be permanently switched off.
  • Option to select?ÿeither DC or AC priority mode. In?ÿAC priority mode, if the inverter is connected to the mains, batteries will be constantly charged by mains power (until fully charged).?ÿAppliances will also be powered by mains by default. In DC priority mode, appliances will always be powered by the batteries, even if the mains input is connected. Once the battery charge drops below a?ÿcertain threshold, mains?ÿinput will automatically kick-in to charge batteries and power appliances.
  • Power saving mode which allows the inverter to work in "power on demand"?ÿstandby mode by only generating power when load is connected (saves energy and battery power)
  • UPS (Uninterrupted Power Supply) system which provides constant power for your appliances when the inverter is working in AC (mains)?ÿmode and mains power supply shuts down (the inverter will automatically switch to the battery and your appliances will not switch off)
  • Bypass?ÿmode when the mains power is connected (in AC priority mode).?ÿIn this mode,?ÿthe AC mains input is automatically linked to AC?ÿoutput of the inverter, therefore?ÿbypassing the?ÿDC-to-AC energy converting?ÿcircuits of the unit, increasing the efficiency and making the quality of the AC output?ÿthe same as?ÿAC input.
  • Detailed LCD?ÿdisplay which shows voltages, battery status, current operating mode and other information
  • Ability to accept input AC?ÿpower from a generator (recommended nominal?ÿpower of the generator is twice the?ÿrated power of the inverter)
  • Various settings allow the user to customise the inverter (output voltage, output frequency, input voltage thresholds, battery type and capacity)

The 3000W?ÿnominal power and 9000W?ÿpeak power ratings mean that this inverter is suitable for most household appliances (such as a fridge, microwave, TV, power tools, vacuum cleaner, kitchen appliances except a cooker etc).

This inverter also?ÿfeatures important protection and safety features, such as overload, over-temperature, low battery?ÿand overcharge protection.

Click on the Details and Specifications tab for more information


  • Input: 12V DC
  • Output voltage: 208V /?ÿ220V /?ÿ230V / 240V (programmable in settings)
  • Output frequency: 50Hz / 60Hz / auto (programmable in settings)
  • Output wave: pure sine wave
  • Input voltage range: normal or wide (programmable in settings)
  • Battery bank type: sealed lead acid, gel, agm, calcium (programmable in settings)?ÿ
  • Battery charging current options: 18A / 36A / 54A / 72A / 90A (programmable in settings)
  • Power rating: 3000W nominal, 9000W?ÿpeak
  • Nominal inverter efficiency: 88%
  • Power saving mode
  • UPS and bypass mode
  • AC / DC priority mode
  • Minimum battery voltage: 10V
  • Low battery alert: 10.5V
  • Protection against: overload, overheat, low battery, overcharge
  • Overcharge protection voltage: 15.7V
  • Power Factor: 0.9-1.0
  • Operating temperature range:?ÿ0 - 40C
  • Weight:?ÿ26 kg
  • Size: 44.2 x 21.8 x 17.9 cm

This product is covered by a?ÿ1 year manufacturer warranty.?ÿ

This inverter comes with a detailed user manual (see Documents tab) which explains wiring, installation and operations.

Please note that this inverter has AC power screw terminals instead of mains power sockets,?ÿwhich means?ÿit can be connected to one or several AC mains power sockets, using suitable AC cables. In the UK, 3-pin UK type mains sockets can be used, and in Europe it can be connected to standard European mains sockets.

Also note that this inverter is not supplied with cables. Detailed recommendations for cable length and thickness are available in the user manual.

If you need help with installation or have any technical questions we can provide FREE support - don't hesitate to get in touch with us by email or phone (see Contact Us page for more information).

For the products under £150 the shipping is £6.99.

Free delivery for the most items over £150.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Recently viewed

Customer Reviews

Be the first to write a review

Why choose us

Untitled_1080_x_1080_px_1 - 4Boats


We source the best products from the Top suppliers only. We’ve taken years of feedback and have doubled down on providing the best service.

Untitled_1080_x_1080_px_2 - 4Boats


Our Suppliers and Partners are joining us in our commitment to challenge the way this industry operates. From product sourcing to fulfilling, they’re the best in the business.

Simple_Image_Play_Built_into_Routine_Cosmetics_TikTok_In-Feed_Ad_1080_x_1080_px_10 - 4Boats


All your orders are personally checked by a member of 4 BOATS and we make sure your orders are dispatched quickly so it arrives to your doorstep ASAP