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  1. RV Inverters
  2. Progressive Dynamics
  3. 1800 Watts
  4. Pure Sine Wave Inverter
  5. 12V
  6. Inverter/Transfer Switch Functions
Progressive Dynamics 1800 Watt Inverter w/ Transfer Switch

Progressive Dynamics 1800 Watt Inverter w/ Transfer Switch

Item # PD44FR
Our Price: $490.86
You Save: $20.45
RV Inverters
Shipping Weight: 13 lbs
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1,800-Watt inverter lets you use appliances and devices wherever the road takes you. Pure sine wave technology is perfect for sensitive electronics like HDTVs and computers. Great Prices for the best rv inverters from Progressive Dynamics. Progressive Dynamics 1800 Watt Inverter w/ Transfer Switch part number PD44FR can be ordered online at or call 1-800-940-8924 for expert service.
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Progressive Dynamics RV Inverters - PD44FR

  • 1800 Watts
  • Pure Sine Wave Inverter
  • 12V
  • Inverter/Transfer Switch Functions
  • Progressive Dynamics
  • Power Center
  • Industrial Duty - Large Loads

1,800-Watt inverter lets you use appliances and devices wherever the road takes you. Pure sine wave technology is perfect for sensitive electronics like HDTVs and computers.


  • 1,800-Watt inverter provides AC power for electronics and appliances inside your RV
  • Pure sine wave technology replicates household AC power, allowing you to run devises safely
    • Perfect for sensitive electronics like HDTVs and computers
  • Integrated transfer switch automatically changes from inverter to shore power when you hook up at the campground
  • Fixed-mount remote lets you control and monitor the inverter
  • Multiple connection points let you secure cables and external devices to the inverter
    • Includes AC input and output terminals, DC input terminals, and remote port
  • Built-in features protect your RV's electrical system
  • UL listed
  • Made in the USA


  • Application: 12 volt battery systems
  • Rated power:
    • Running (rated) power output: 1,800 watts
    • Starting (surge) power output: 3,600 watts
  • Voltage:
    • Input: 12 VDC
    • Output: 120 VAC
  • Transfer switch power: 20 amps
  • Cable length: 50'
  • Dimensions: 15" long x 7-7/8" wide x 4" deep
  • Weight: 11 lbs
  • 2-Year limited warranty


This 12V inverter, with built-in transfer switch, changes DC output from your RV batteries into AC power and sends it to the electrical system. Using pure sine wave technology, it creates clean power with low distortion, making it safe, efficient, and perfect for sensitive electronics like computers. The inverter can generate 3,600 starting watts and 1,800 running watts which is a great fit for appliances and electronics. Additionally, with the integrated transfer switch, it will automatically change from inverter to shore power when available.

Functions and Features

To connect your AC loads, the inverter includes hardwired input and output terminals. It also has positive and negative DC terminals that connect to your batteries. Lastly, there is a port for the included fixed-mount remote. The system includes a number of safety features. It has a reverse polarity protection that will protect the converter if the battery is hooked up incorrectly. Additionally, the unit includes protection for overvoltage, undervoltage, and overloading which can damage your equipment, as well as the converter. The built-in cooling fan also removes excess heat from the unit. The fan speed is proportional to the internal temperature on the converter, so when the power demand is low, the fan will operate quietly. For additional safety, installing a 200-amp fuse (sold separately) between the battery bank and the inverter will protect your equipment from power surges.

Built-In Transfer Switch Automatically Switches to Shore Power

The integrated transfer switch selects the primary source of 120V AC current. This switch has been pre-wired to automatically change from inverter to shore power to conserve battery life. It includes a 20-amp leg rated at 135V. Additionally, since the switch only accepts one active source, it protects your electrical system from dangerous backfeed that can damage your equipment.

Fixed-Mount Remote Provides Easy Monitoring and Control

inverter remote

The fixed-mount remote lets you monitor and control the inverter from inside your RV. It includes a digital display that shows voltage, output power, error codes, and a low battery indicator. It also has a power button to turn the inverter on and off.

How It Installs

The inverter mounts inside your RV in a dry location with ventilation. It should be installed close to the battery bank, but not in the same compartment.

inverter terminals

The DC terminals are wired to the battery bank.

There are several ways to connect the inverter to your RV's electrical system, but this will depend on your rig and how you want to use your inverter. If your RV's distribution panel only has one leg, a subpanel will be needed for installation. You will also need a 100-amp circuit breaker between the inverter and battery positive post. Two 20-amp circuit breakers will be needed to channel AC power from the main panel into the inverter and then out into the subpanel.

PD1618A Progressive Dynamics Intelli-Power 1600 Pure Sine Wave Series Inverter - 12 Volts - 1800 Watts

Replaces PD1618

Installation Details PD44FR Installation instructionsAlternate Instructions PD44FR Installation instructions

Customer Satisfaction Score:

Customer Reviews

Progressive Dynamics 1800 Watt Inverter w/ Transfer Switch - PD44FR

Average Customer Rating:  4.8 out of 5 stars   (1257 Customer Reviews)

1,800-Watt inverter lets you use appliances and devices wherever the road takes you. Pure sine wave technology is perfect for sensitive electronics like HDTVs and computers.


This is a GREAT inverter. Love the digital readout inside the RV!!!


Excellent product, and service. I did a lot of research for an RV inverter, and there are a lot of manufacturers. But the biggest complaint was not being able to get ahold of anyone if there was a question or problem.,E-trailer is wonderful to work with, with excellent products.


Unfortunately the item was damaged during shipment. It contacted and spoke to Kate. She is having another inverter shipped to me and will email return instructions to me. is a five star company and damage during shipment is out of their control.


Outstanding product! Easy installation and works fantastic!


Super easy installation thanks to outstanding customer support from Dennis. Compact unit fit my tight space requirements perfectly. Highly recommend!


I gave the product a 2 star review because it failed right out of the box. I could have been the fault of shipping to the company or to me this is not known. I will give customer support a 10 star rating for helping me to get the part warrantied through the manufacturer


Installed it a year ago, and still doing what it's suppose to do.


Brent was very helpful and professional


Great customer service


Nice products


Its nice to have a unit that operates as it is supposed to.



Excellent value and features. Just the right size for my needs.






etrailer should take some lessons from Amazon. When multiple products are sent to a distributor in a large box or pallet, the individual items should then be shipped for an order in a secure package. etrailer simply slapped a label on the manufacturer’s flimsy carton and tossed it to USPS who succeeded it breaking the single stran of tape around the box. When I received the package, the box was totally opened on one end and the inverter mounting tab was bent. Not the delivery I would expect for a $600+ item.


We utilized the Progressive Dynamics Inteli-Power RV Converter and lithium Battery Charger as part of our lead acid to Lithium upgrade for our Aliner RV. We had several manufacturers to choose from but are very pleased with our decision to go with this product. It’s performance remains steadfast after the first year in service, its quiet, efficient, reliable and perhaps best of all MADE IN AMERICA! The multi stage smart charging g work flawlessly with our Lithium battery system. 100% recommendations from this satisfied us timer!


I installed this in my camp with 400 watts of solar an a LFP04 battery with a generator hookup. I use the lithium charge profile and it works great. It runs my 12v rv refrigerator with no issue.


Installation of PD9260C into Parallax 7300 power distribution panel

I purchased the Progressive Dynamics PD9260 to replace the power converter in my 2007 Airstream. My trailer had a Parallax7300 power distribution and power converter (AC to DC) installed from Airstream. I decided to replace just the power converter after it had failed. The PD9260C fit perfectly where the previous converter was installed with very little modification or effort.

I simply removed the older converter, removed some standoffs where the previous converters circuit board was mounted along with the old fan, and then drilled some holes to mount the PD9260 in the mounting tray of the old unit. I wired the new converter to the existing connections and tried it out. Everything worked as expected.


A little bit confusing when speaking with sale team, received conflicting information regarding converters application. Shipping was fast but converter container was damaged and poorly packed for sensitive electronics. Previous business with etrailer has been stellar. May be awhile before I can hookup converter, so hopeful nothing was damaged!


I purchased the Progressive Dynamics PD9200 to replace a failing OEM converter. The unit is wider than the original but with some minor wood work I was able to install it in the original location. As soon as I powered it up all of our problems in the 2018 Forest River 5th wheel vanished. Our main issue was flickering LEDs which drove us crazy. Time will tell if this is a quality product. etrailer is amazing to work with. The item arrived ahead of the estimated delivery date. It was packaged in the original box so the serial number on the unit matched the number on the box. No fear of counterfeit items from these folks.


Game-changer for our lifepo4 batteries! I swapped out the PD 4135K for the WFCO 8735P that came standard in our trailer. Installation was fairly easy, just had to glue and screw a 1/2" square dowel in one side of the cutout to make the opening smaller. Wiring was simple. We only charge throu the converter when we don't have enough solar, and it's nice to know we're maximizing the charging from our generator. The lithium switch is really small and a little hard to access, but I shouldn't need to get to it again unless we switch back to AGM, which isn't going to happen. Happy we made the change!


Glad I went lithium. Actually I have both. I can flip between lithium and my lead acid batteries for cold weather travels. But lithium charges up in half the time or less. And I have almost twice the reserve power. My only question for myself is, do I go solar, or do I install another bank of lithium? By far this is the best upgrade I've made to our rig.

Show More Reviews

See what our Experts say about this Progressive Dynamics RV Inverters

  • Is The Progressive Dynamics Pure Sine Wave Inverter # PD44FR Compatible With Lithium Batteries
    Yes, the Progressive Dynamics Pure Sine Wave Inverter w/ Transfer Switch - Remote - 1,800 Watts - 12V # PD44FR was designed to be compatible with both Lithium and Lead Acid batteries. I've attached the electrical connection guide for you below to ensure you have the correct gauge wire to make the DC connection to your lithium battery and AC connection to your RV's distribution panel. you'll want to follow the PD1618 instructions in this chart.
    view full answer...
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  • Wiring Diagram For Installing Pure Sine Wave Inverter w/ Transfer Switch # PD44FR
    I have linked the instructions for the Progressive Dynamics Pure Sine Wave Inverter w/ Transfer Switch # PD44FR below along with a copy of the quick reference guide. Inside the manual is a wiring diagram for connecting the inverter to both a 30amp or 50 amp RV. As for the wiring on your 5th wheel you will need to contact the RV manufacturer for a copy of the wiring diagram if you need one for your 5th wheel.
    view full answer...
  • Pure Sine Wave Inverter w/ Transfer Switch Amperage Draw and Efficiency
    I spoke with my rep at Progressive Dynamics about the Pure Sine Wave Inverter w/ Transfer Switch item # PD44FR you were looking at. He told me there isn't an efficiency rating like you would find on a refrigerator but it does conform to the UL standards for efficiency. It runs at a 1,000 watt continuous and 2,000 watt peak. He also told me the maximum amperage draw on standby is 1 amp and will not be enough to drain your battery if left on for a month. We ship through UPS.
    view full answer...
  • Is Progressive Dynamics Pure Sine Wave Inverter w/ Transfer Switch Compatible with Solar Power Panel
    Your solar power controller is perfectly compatible with the Progressive Dynamics Pure Sine Wave Inverter w/ Transfer Switch # PD44FR that you referenced.
    view full answer...
  • Progressive Dynamics Pure Sine Wave Inverter w/ Transfer Switch
    Per the Installation and Operation Guide for the Progressive Dynamics Pure Sine Wave Inverter w/ Transfer Switch, # PD44FR it references using Romex and pushing the conductor into place. This states using lugs instead of ring terminals. I suggest using 12 gauge.
    view full answer...
  • How Much Ventilation Space is Necessary to Use the Progressive Dynamics Inverter # PD44FR?
    There are a few different clearance guidelines for installing the Progressive Dynamics Pure Sine Wave Inverter # PD44FR. As far as the requirements for proper ventilation to avoid overheating, the manufacturer recommends a ventilated area of your RV that does not block the fans in any way. The inverter should also not be used to store other objects in order to avoid obstruction. For the extra space needed, they recommend a minimum of 2 additional inches at the top of the inverter and a...
    view full answer...
    Image 1 for
  • What Pure Sine Wave Inverter Is Needed
    To calculate power consumption simply multiply wattage by the number of hours it is being used. Remember to consider type of current, AC or DC. The number of watts is equal to amps multiplied by volts. Your battery bank is rated in Amp Hours, AH. If you have a lithium chemistry battery you can use almost the entire charge before voltage drops below a usable range. If you have a battery bank that is lead acid chemistry, including those labeled as AGM or Gel, you can use at best half of...
    view full answer...
  • Will the Progressive Dynamics Pure Sine Wave Inverter with Transfer Switch Work with Shore Power
    The Progressive Dynamics Pure Sine Wave Inverter with Transfer Switch part # PD44FR will be hooked up to both the batteries and shore power/generator. The integrated transfer switch will then transfer power to the Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger part # PD4045KA. The switch knows when you are hooked up to shore power and will cut power to the batteries when the connection is made. The Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart...
    view full answer...
  • Installing the Progressive Dynamics Mighty Mini AC/DC Panel with an Inverter/Transfer Switch
    The Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger part # PD4060K has a built-in converter which will charge the batteries using shore power. It does not contain an inverter or transfer switch which will power the appliances without being hooked up to shore power and cut power when shore power is plugged in. For this, you'd need the Progressive Dynamics Pure Sine Wave Inverter with Transfer Switch like part # PD44FR. I have attached a sample wiring diagram below....
    view full answer...
    Image 1 for
  • Recommended Inverter With Transfer Switch To Power A Residential Fridge
    Conventional refrigerators typically have a starting wattage of 800-1200 watt-hours/day, and a running wattage of around 150-watt hours/day. Refrigerators are reactive devices that require additional power to start because they contain an electric motor, but significantly fewer watts to run as they remain on. Because of this I recommend the Progressive Dynamics Pure Sine Wave Inverter w/ Transfer Switch - Remote - 1,800 Watts - 12V # PD44FR. The # PD44FR has an integrated transfer switch...
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  • Inverter Needed To Power An Outdoor Kitchen Fridge On A 2019 Coachmen Freedom Express Travel Trailer
    The cable length for the Go Power Industrial Pure Sine Wave Inverter # 34279950 can't extend past 10' so you would need to either install a second battery closer to the fridge or use a different style inverter, like the Progressive Dynamics 1800 Watt Inverter w/ Transfer Switch # PD44FR. This inverter would wire into your AC distribution panel and then into a sub-panel where you would move the circuit breakers for anything you want to be powered by the inverter to. This is a lot more...
    view full answer...
  • Can The Progressive Dynamics PD44FR Inverter Be Installed Without A Subpanel
    No, the Progressive Dynamics 1800 Watt Inverter w/ Transfer Switch # PD44FR requires a sub panel regardless of what you're powering. The AC circuit breaker you're referencing wouldn't have power unless you were connected to shore power, which would eliminate the need for the inverter anyway. Inverters receive power from the battery and send that to one bus bar to power it and send power through any circuits on it. Without a subpanel you'd just create a power loop and drain the battery....
    view full answer...
  • Transfer Switch and Power Panel Recommendation for Lithium Ion Battery Setup
    It sounds like you're needing a distribution center like the Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger - 45 Amp # PD4045KA as well as an inverter/transfer switch like the Progressive Dynamics # PD44FR. The Might Mini Panel has the AC/DC panels to distribute power as well as the converter to charge your trailer batteries when connected to shore power, and then the inverter/transfer switch pulls power from your battery bank unless you're connected to shore...
    view full answer...
  • Inverter for Taxa Woolley Bear with 125 amp Ionic Lithium Battery
    For a 125 amp hour battery you'd need an inverter with at least a 1,500 watt rating which for that we have the part # 34279950 which is a 1,500 watt pure sine inverter. Then for a similarly rated transfer switch you'd want the part # PD44FR.
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  • Will New AC Unit Be Hardwired to Current Trailer AC Power Connections
    If your current AC unit is hardwired in and it uses 120V power then yes, you'll simply hardwire in your new AC unit, like the Advent Air RV Air Conditioner - 13,500 Btu # ACM135. If your old AC unit used DC power instead (which isn't very common) then you'll need to install an inverter like the Progressive Dynamics Pure Sine Wave Inverter # PD44FR in order to have 120V power as opposed to 12V DC power.
    view full answer...
  • How to Operate Refrigerator When Mobile
    If you have the Everchill RV Mini Refrigerator - 4.5 Cu Ft - 115V, # 324-000109 this operates from 115V AC only. You will need to either be connected to shore power or have an inverter to operate. Something to take your battery power and change from 12 VDC to an alternating current, AC, that is usable for this appliance. You stated that the TV is connected to an inverter, check its rating, if it has wattage rating that supports the refrigerator operation then connect the fridge to this...
    view full answer...
  • Recommended Pure Sine Wave Inverter With Switch to Power Refrigerator
    These electrical systems can be pretty confusing but believe me when I say that you are already more knowledgeable than many when it comes to what you need, and I'm happy to say we have the exact inverter to meet your requirements. The Progressive Dynamics Inverter w/ Transfer Switch # PD44FR is the perfect option because it has an integrated transfer switch. This is automatic and the switch time is fast enough that there won't be any type of interruption of other electrical operations.
    view full answer...
    Image 1 for
  • Boat Trailer Jack Recommended for a Coupler Height between 15 and 24 Inches High
    Yes! For a boat jack that is similar to the # DL67MR that provides you with the smaller capacity you need, that is the Swivel Marine Trailer Jack with Caster Wheel - Bolt On - Sidewind - 10" Travel # DL84MR. The bracket height from the top of the bracket to the ground is 15-1/2" when retracted and 25-9/16" when extended. With this height range, that fits into your coupler height requirements. As far as compatibility, the jack fits maximum trailer tongue heights of 24-3/4" and fits square...
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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Cody B
Updated by:
Cody B
Employee Manda E
Updated by:
Manda E
Employee Carrie F
Updated by:
Carrie F
Employee Daron K
Edited by:
Daron K
Employee Alex H
Written by:
Alex H
Employee Michael B
Installed by:
Michael B
Employee Kevin C
Test Fit:
Kevin C
Employee Schuyler H
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