What input voltage does the Fronius Primo 3.8 kW support?

It supports a wide 208/240VAC input range, providing flexibility for different residential setups.

How efficient is the Fronius Primo 3.8 kW inverter?

The inverter is highly efficient, ensuring optimal solar energy conversion and reliable power output for home use.

Is the Fronius Primo 3.8 kW easy to install?

Yes, it features a compact, durable design that is easy to integrate into existing residential solar systems.

What are the key specifications of the Fronius Primo 3.8 kW inverter?

Key specs include: Power Output: 3.8 kW Input Voltage: 208/240VAC Type: Single-Phase Grid-Tied Inverter Dimensions: 14.6 x 11.8 x 5.9 in Weight: 29.8 lbs MPN: 4210064800

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Fronius Primo 3.8 kW Single Phase Grid-Tied Inverter 208/240VAC – 4210064800

Fronius Primo 3.8 kW Single Phase Inverter

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Free Returns within 30 Days of Purchase

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SKU PES-SPS-SIV-0869

Fronius Primo 3.8 kW Single Phase Grid-Tied Inverter 208/240VAC – 4210064800

$2,037.08 USD

$ $2,037.08 USD

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SKU:PES-SPS-SIV-0869
Height: 5.9
Isfollow: true
Isindex: true
Length: 14.6
Mpn number: 4210064800
Width: 11.8
MPN Number: 4210064800

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In Stock

Get yours today!

9+ sold

In the last 7 days

Flat Rate Shipping - Calculated at Checkout

Get it between Mon, Sep 22 - Wed, Sep 24

Free Returns

Free Returns within 30 Days of Purchase

Lifetime Customer Support

Unlimited lifetime support, always available.

View full details

Fronius Primo 3.8 kW Single Phase Grid-Tied Inverter 208/240VAC

The Fronius Primo 3.8 kW Inverter delivers premium performance for homeowners seeking reliable, efficient solar energy conversion. Engineered by Fronius, an industry leader with over 75 years of manufacturing expertise, this single-phase grid-tied inverter transforms DC power from your solar panels into clean, usable AC electricity for your home.

Built for residential installations, the Fronius Primo 3.8 kW Inverter features a wide 208/240VAC voltage range that accommodates diverse grid configurations across North America. Its SnapINverter mounting system allows for fast, tool-free installation, reducing labor costs and setup time. The integrated datalogger and WiFi connectivity enable real-time system monitoring through the Fronius Solar.web platform, giving you complete visibility into your energy production.

What sets the Fronius Primo 3.8 kW Inverter apart is its SuperFlex Design, which maximizes energy harvest by supporting two independent MPP trackers. This means optimal performance even when panels face different directions or experience partial shading. With a peak efficiency rating of 96.5% and a lightweight 29.8 lb aluminum

Key Features & Benefits

High-Efficiency Energy Conversion
The Fronius Primo 3.8 kW Inverter achieves up to 96.5% peak efficiency, ensuring maximum energy harvest from your solar array while minimizing conversion losses.

Dual MPPT Technology
Two independent Maximum Power Point Trackers optimize energy production across varying roof orientations and shading conditions, ideal for complex residential installations.

Smart Monitoring Included
Built-in WiFi and the free Fronius Solar.web portal provide 24/7 access to production data, system alerts, and historical performance analytics from any device.

SnapINverter Mounting System
The innovative quick-mount design separates the wiring compartment from the power stage, enabling faster installation and simplified maintenance without disconnecting cables.

Quiet, Indoor/Outdoor Operation
Fanless cooling technology ensures silent operation while the IP65-rated enclosure protects against dust and water ingress for flexible placement options.

Technical Specifications

MPN	4210064800
Manufacturer	Fronius
AC Power Output	3.8 kW
AC Voltage Range	208/240VAC
Inverter Type	Single-Phase Grid-Tied
Number of MPP Trackers	2
Max DC Input Voltage	600V
Peak Efficiency	96.5%
CEC Weighted Efficiency	95.5%
Dimensions (H x W x D)	14.6 x 11.8 x 5.9 in
Weight	29.8 lbs
Enclosure Rating	NEMA 4X / IP65
Cooling	Convection (Fanless)
Monitoring	WiFi, Ethernet, Fronius Solar.web
Warranty	10 Years (Extendable)
Certifications	UL 1741, IEEE 1547, FCC Part 15

enclosure, this inverter delivers exceptional power density without compromising durability.

Backed by a 10-year standard warranty (extendable to 15 or 20 years), the Fronius Primo 3.8 kW Inverter represents a sound investment in your home's energy future.

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 3.8 kW Single Phase Grid-Tied Inverter 208/240VAC

Key Features & Benefits

High-Efficiency Energy Conversion
The Fronius Primo 3.8 kW Inverter achieves up to 96.5% peak efficiency, ensuring maximum energy harvest from your solar array while minimizing conversion losses.

Dual MPPT Technology
Two independent Maximum Power Point Trackers optimize energy production across varying roof orientations and shading conditions, ideal for complex residential installations.

Smart Monitoring Included
Built-in WiFi and the free Fronius Solar.web portal provide 24/7 access to production data, system alerts, and historical performance analytics from any device.

Quiet, Indoor/Outdoor Operation
Fanless cooling technology ensures silent operation while the IP65-rated enclosure protects against dust and water ingress for flexible placement options.

Technical Specifications

MPN	4210064800
Manufacturer	Fronius
AC Power Output	3.8 kW
AC Voltage Range	208/240VAC
Inverter Type	Single-Phase Grid-Tied
Number of MPP Trackers	2
Max DC Input Voltage	600V
Peak Efficiency	96.5%
CEC Weighted Efficiency	95.5%
Dimensions (H x W x D)	14.6 x 11.8 x 5.9 in
Weight	29.8 lbs
Enclosure Rating	NEMA 4X / IP65
Cooling	Convection (Fanless)
Monitoring	WiFi, Ethernet, Fronius Solar.web
Warranty	10 Years (Extendable)
Certifications	UL 1741, IEEE 1547, FCC Part 15

enclosure, this inverter delivers exceptional power density without compromising durability.

Backed by a 10-year standard warranty (extendable to 15 or 20 years), the Fronius Primo 3.8 kW Inverter represents a sound investment in your home's energy future.

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?

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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.

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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

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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.

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Solar Kit for Mobile Work Van

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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!

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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.

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Highly Recommend

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