What is the Fronius Primo 11.4-1 208–240 VAC inverter used for?

It is a single-phase string inverter designed for residential and small commercial solar installations to convert DC from solar panels into AC for home or business use.

What is the maximum efficiency of the Fronius Primo 11.4-1 inverter?

The inverter achieves up to 97.8% peak efficiency, ensuring optimal energy conversion from solar panels.

Does the Fronius Primo 11.4-1 support monitoring?

Yes, it has built-in Wi-Fi, Modbus, and SunSpec interfaces for seamless integration with solar monitoring platforms and smart energy systems.

Can this inverter handle harsh weather conditions?

Yes, it features a rugged NEMA 4X enclosure, natural convection cooling, and is rated IP65 for reliable outdoor operation.

What is the warranty period for the Fronius Primo 11.4-1 inverter?

The standard warranty is 10 years and can be extended up to 20 years.

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Fronius Primo 11.4-1 208-240VAC - 4210076800

Fronius Primo 11.4-1 208–240 VAC Single-Phase String Inverter

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SKU PES-SPS-SIV-0748

Fronius Primo 11.4-1 208-240VAC - 4210076800

$4,429.69 USD

$ $4,429.69 USD

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In Stock

Get yours today!

9+ sold

In the last 7 days

Flat Rate Shipping - Calculated at Checkout

Delivery timeframe shown above at checkout

Lifetime Customer Support

Unlimited lifetime support, always available.

In High Demand! Order Now To Secure Your Items

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Specifications

Datasheet

Power 3.8 kW

Input Voltage 200 V to 480 V

Max Dc Power 3940 W

Output Voltage 208/240 VAC

Mppt Count 2

Protection Class NEMA 4X (IP65)

Mpp Voltage Range 200-480 V

Dc Voltage Range 80-1000 V

Nominal Ac Power 3800 W

Max Output Power 3800 W

Nominal Output Current 15.8 A

Max Efficiency 98.1%

Max Input Current 25/12.5 A (per MPPT)

What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Fronius Primo 11.4-1 208–240 VAC Single-Phase String Inverter — High-Performance Residential Power

The Fronius Primo 11.4-1 208–240 VAC Single-Phase String Inverter (Model: 4210076800) is a premium grid-tied inverter engineered for residential and small commercial solar installations. Offering industry-leading reliability, Wi-Fi connectivity, and an integrated DC disconnect, the Fronius Primo 11.4-1 208–240 VAC Single-Phase String Inverter delivers efficient and safe energy conversion with superior monitoring capabilities.

Product Features

Advanced Power Conversion

Achieves up to 97.8 % efficiency with precision-engineered Fronius technology, ensuring maximum solar energy harvest.

Integrated Communication Suite

Built-in Wi-Fi, Modbus, and SunSpec interfaces allow seamless integration with solar monitoring platforms and smart energy systems.

Smart Design

The Fronius Primo 11.4-1 208–240 VAC Single-Phase String Inverter includes a compact wall-mountable enclosure, user-friendly display, and SnapINverter design for quick installation and servicing.

Proactive Energy Management

Dynamic feed-in management and integrated data logging support grid compliance and optimised self-consumption.

Durable and Reliable

Rugged construction, natural convection cooling, and NEMA 4X enclosure ensure dependable performance in harsh outdoor conditions.

How It Works

The Fronius Primo 11.4-1 208–240 VAC Single-Phase String Inverter efficiently converts DC power from solar panels into AC power for residential or commercial use. It continuously monitors grid voltage and frequency to maintain safe, stable, and efficient operation.

Specifications

Model	4210076800
Rated AC Power Output	11.4 kW (11,400 W)
Input Voltage Range (DC)	150 – 600 V DC
AC Output Voltage	208 – 240 V AC
AC Output Current	45.8 A
Peak Efficiency	97.8 %
Weighted Efficiency (CEC)	97 %
Cooling Method	Natural Convection (Fanless)
Enclosure Rating	NEMA 4X / IP65 (Outdoor Rated)
Communication	Wi-Fi / Modbus RTU / SunSpec / RS485
Operating Temperature Range	-40 °F to +140 °F (–40 °C to +60 °C)
Dimensions (L × W × H)	24.7 × 20.1 × 8.9 in (628 × 510 × 225 mm)
Weight	≈ 47.3 lb (21.5 kg)
Certifications	UL 1741 SA, IEEE 1547, Rule 21, NEC 2017 Compliant
Warranty	10 Years (Extendable to 20 Years)
Manufacturer	Fronius USA LLC

Specifications verified from official Fronius Primo 11.4-1 Datasheet.

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Fronius Primo 11.4-1 208–240 VAC Single-Phase String Inverter — High-Performance Residential Power

Product Features

Advanced Power Conversion

Achieves up to 97.8 % efficiency with precision-engineered Fronius technology, ensuring maximum solar energy harvest.

Integrated Communication Suite

Built-in Wi-Fi, Modbus, and SunSpec interfaces allow seamless integration with solar monitoring platforms and smart energy systems.

Smart Design

Proactive Energy Management

Dynamic feed-in management and integrated data logging support grid compliance and optimised self-consumption.

Durable and Reliable

Rugged construction, natural convection cooling, and NEMA 4X enclosure ensure dependable performance in harsh outdoor conditions.

How It Works

Specifications

Model	4210076800
Rated AC Power Output	11.4 kW (11,400 W)
Input Voltage Range (DC)	150 – 600 V DC
AC Output Voltage	208 – 240 V AC
AC Output Current	45.8 A
Peak Efficiency	97.8 %
Weighted Efficiency (CEC)	97 %
Cooling Method	Natural Convection (Fanless)
Enclosure Rating	NEMA 4X / IP65 (Outdoor Rated)
Communication	Wi-Fi / Modbus RTU / SunSpec / RS485
Operating Temperature Range	-40 °F to +140 °F (–40 °C to +60 °C)
Dimensions (L × W × H)	24.7 × 20.1 × 8.9 in (628 × 510 × 225 mm)
Weight	≈ 47.3 lb (21.5 kg)
Certifications	UL 1741 SA, IEEE 1547, Rule 21, NEC 2017 Compliant
Warranty	10 Years (Extendable to 20 Years)
Manufacturer	Fronius USA LLC

Specifications verified from official Fronius Primo 11.4-1 Datasheet.

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Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

Jacob B

Easy Process, Genuine Support

Patrick B

Off Grid Solar Purchase

James Martin

Highly Recommend

Brian H

Solar Kit for Mobile Work Van

Keith S

Best Tech Support

Coll A

Great Experience