--- product_id: 88177666 title: "FXR 3.6kW 120VAC 48VDC 45A Vented Inverter/Charger VFXR3648A" brand: "outback" price: "$4325.47" currency: USD in_stock: true reviews_count: 7 url: https://www.desertcart.us/products/88177666-fxr-3-6kw-120vac-48vdc-45a-vented-inverter-charger-vfxr3648a store_origin: US region: United States of America --- # 3.6kW peak power output Up to 93% operating efficiency 48VDC input for high-capacity battery systems FXR 3.6kW 120VAC 48VDC 45A Vented Inverter/Charger VFXR3648A **Brand:** outback **Price:** $4325.47 **Availability:** ✅ In Stock ## Summary > 🔌 Empower your energy independence with OutBack FXR — where flexibility meets future-ready power. ## Quick Answers - **What is this?** FXR 3.6kW 120VAC 48VDC 45A Vented Inverter/Charger VFXR3648A by outback - **How much does it cost?** $4325.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/88177666-fxr-3-6kw-120vac-48vdc-45a-vented-inverter-charger-vfxr3648a) ## Best For - outback enthusiasts ## Why This Product - Trusted outback brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Modular & Scalable Design:** Stack up to 9 units for three-phase or 10 units for grid-tied setups—grow your system as your energy needs evolve. - • **Industry-Leading Efficiency:** Maximize energy use with up to 93% operating efficiency, reducing waste and boosting performance. - • **Power Your Off-Grid Freedom:** Seamlessly switch between off-grid and grid-tied modes with a single versatile inverter/charger. - • **Built to Last with Confidence:** Backed by a 5-year warranty and UL1741-SA listing, ensuring reliability for years of uninterrupted power. - • **Smart Control at Your Fingertips:** Pair with MATE3S (sold separately) for remote monitoring and generator assist, keeping you connected anywhere. ## Overview The Outback FXR 3.6kW 120VAC 48VDC 45A Vented Inverter/Charger is a high-efficiency, modular power solution designed for both off-grid and grid-tied applications. Featuring programmable modes, stackable architecture for scalable power, and compatibility with remote monitoring via MATE3S, it delivers up to 93% efficiency and robust 3.6kW output. Ideal for professional-grade renewable energy systems, it comes with a 5-year warranty and UL1741-SA certification. ## Description The latest, most advanced features on the industry’s most trusted and proven platform—that’s the essence of OutBack’s new FXR Series of Grid/Hybrid inverter/chargers. Capable of off-grid or grid-connected operation in a single model, the FXR Grid/Hybrid inverter/chargers provide system designers with unprecedented flexibility and compatibility for nearly any power conversion scenario. FXR inverter/chargers can be paired with a MATE3S (sold separately) to add OPTICS RE to monitor and control system performance from any location. Available in power ranges from 2000W-3600W, multiple units may be stacked and connected with other OutBack Power electronics for more seamless system integration and the ability to function in a wide variety of applications, and system sizes. Up to nine inverters can be combined in a 3-phase system with the 12V, 24V or 48V models, and up to 36kW in a grid-tied 24V or 48V system with optional MATE3S and HUB10.3 (sold separately). The exclusive modular system architecture means that increased power output is just an additional FXR inverter/charger away. Listed to UL1741-SA. 5-Year Manufacturer Warranty. Review: Good unit until I needed support. - System worked well for a number of years and then I needed support. Very, very difficult to reach anyone if you are an end user and off grid without access to solar Installers to do service visits. Switching to lithium ion batteries from gel acid. It’s been impossible to reach anyone in tech-support to figure out what new equipment I need. Had the same problem when my old system began to fail. Review: GREAT AND RELIABLE - I live off the grid and I have been for quite sometime. I first started using OutBack products about 20 years ago when they first came out with their FX Inverters. This year I am in the process of possibly connecting to the grid and I could not do that with my existing FX Inverters so I upgraded to these VFXR3648A which can be used for both off-grid and grid-tie applications. I purchased two of these to run both my home and my woodshop. I could actually run them off one but because of the surge power to start some of my tools I needed to have them both. And there is another advantage to having two inverters and that is that there is twice the charging power if you need it and that the second unit is sitting their idle until your first inverter uses about two thirds its capacity when it kicks in to relieve the master unit thus saving ware and tier on each unit. My solar system is completely OutBack except for the solar panels, wind turbines, and the LP backup generator. ## Features - Single-phase 120V Sinewave Output 48V Version. - Programmable for Seven Different Modes with Generator Assist (with optional MATE3S sold separately). - Modular, Stackable Design for up to Nine Inverters in Three-phase and 10 Inverters in Grid-tied (with optional HUB10 and MATE3S sold separately). - Up to 93% Operating Efficiency. - Field Upgradable Software. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01NB124F6 | | Best Sellers Rank | #1,980,293 in Automotive ( See Top 100 in Automotive ) #1,827 in Power Inverters | | Customer Reviews | 3.2 3.2 out of 5 stars (20) | | Is Discontinued By Manufacturer | No | | Item Weight | 61 pounds | | Item model number | VFXR3648A | | Manufacturer | Outback Power | | Product Dimensions | 16.25 x 8.25 x 13 inches | ## Product Details - **Brand:** Outback - **Model Name:** VFXR3648A - **Power Source:** Battery Powered, Solar Powered - **Recommended Uses For Product:** Household appliances - **Wattage:** 3600 watts ## Images ![FXR 3.6kW 120VAC 48VDC 45A Vented Inverter/Charger VFXR3648A - Image 1](https://m.media-amazon.com/images/I/61BBPeLV7xL.jpg) ## Questions & Answers **Q: Unit is too tall for my RV. Can it be laid on its side?** A: Per the manufacturer the unit can be mounted in any direction. **Q: I won't use the charger. Will it work as an inverter sans any 120v input?** A: You just need to give it around 48V (batteries and/or solar and/or wind too, i guess). actually, you can program it down to 37V using a MATE, iirc. The 120V AC input is just for backup, and it's not required (so, for instance if you are running it indoors and you only have 200 watts of solar, you can still use that 200 watts to run a 1500 watt heater, but the other 1300 watts will come from your AC mains power source) **Q: This inverter arrives needing no other accessories to begin inverting?** A: This offer is the inverter only and does not include NEC required input/output disconnects (fuses or breakers). Optional Outback Power inverter controller MATE3 is also sold separately. All electrical wiring should only be performed by a qualified electrician to meet NEC and local electrical codes. Full product specifications are available at the Outback Power site. **Q: What's the diference between vfxr3648a and vfxr3648la?** A: -LA suffix for previous models for 127VAC 60Hz overseas applications. ## Customer Reviews ### ⭐⭐⭐ Good unit until I needed support. *by T***R on June 15, 2025* System worked well for a number of years and then I needed support. Very, very difficult to reach anyone if you are an end user and off grid without access to solar Installers to do service visits. Switching to lithium ion batteries from gel acid. It’s been impossible to reach anyone in tech-support to figure out what new equipment I need. Had the same problem when my old system began to fail. ### ⭐⭐⭐⭐⭐ GREAT AND RELIABLE *by T***F on November 24, 2020* I live off the grid and I have been for quite sometime. I first started using OutBack products about 20 years ago when they first came out with their FX Inverters. This year I am in the process of possibly connecting to the grid and I could not do that with my existing FX Inverters so I upgraded to these VFXR3648A which can be used for both off-grid and grid-tie applications. I purchased two of these to run both my home and my woodshop. I could actually run them off one but because of the surge power to start some of my tools I needed to have them both. And there is another advantage to having two inverters and that is that there is twice the charging power if you need it and that the second unit is sitting their idle until your first inverter uses about two thirds its capacity when it kicks in to relieve the master unit thus saving ware and tier on each unit. My solar system is completely OutBack except for the solar panels, wind turbines, and the LP backup generator. ### ⭐ inverter not working *by A***R on September 21, 2020* inverter did not power up after installation. inside looks like a refirbrished unit. ## Frequently Bought Together - Outback FXR 3.6kW 120VAC 48VDC 45A Vented Inverter/Charger VFXR3648A - TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing - TKDMR 160Pcs Copper Wire Lugs AWG2 4 6 8 10 12 with Heat Shrink Set, 80Pcs Battery Cable Ends Ring Terminals Connectors Tubing Assortment Kit --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/88177666-fxr-3-6kw-120vac-48vdc-45a-vented-inverter-charger-vfxr3648a](https://www.desertcart.us/products/88177666-fxr-3-6kw-120vac-48vdc-45a-vented-inverter-charger-vfxr3648a) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-07*