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Fronius Symo 15 kW String Inverter 15.0-3 208 - A1 SolarStore

Fronius Symo 15 kW Grid-tie Inverter 15.0-3 208

Fronius Symo 15 kW Grid-tie Inverter 15.0-3 208

(34 ratings)

SpecificationCompareSee all
PhasesThree-Phase
AC Output Voltage208 VAC
Max Input PV Voltage1000 Voc
Attachments
Return policy
Datasheet

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Customer reviews & Questions

Verified buyer reviews

Reviews (34)
Questions (2)

Adrian B.

02/22/2025

Fronius Symo 10 kW Grid-tie Inverter 10.0-3 208-240

I can check my system right from my phone awesome monitoring app

Louis

09/30/2024

Fronius Primo 3.8kW Inverter FRO-P-3.8-1-208-240

Great service from A1 SolarStore. Unfortunately, the inverter was defective out of the box. Hardware error 407. Fronius tech support is very good. Awaiting the replacement.

Terry2

10/01/2021

Fronius Primo 3.8kW Inverter 3.8-1

The inverter itself is great, but it’s suitable only for very small installations. Well, a 5kW one actually is fine. Too bad it’s grid -tie, i wanted to use it for my van(

Clarus

09/17/2021

Fronius Primo 3.8kW Inverter 3.8-1

man, i love the production. feels like 2 mppts do make a difference. really nothing to complain about here, great inverter, very happy with it.

Mark R

08/11/2021

Fronius Primo 10kW Inverter FRO-P-10.0-1-208-240

I bought Fronius Primo 10kW for a system consisting of 27 modules 370W each. So far so good. A1 Solar had the lowest price, but their standards were up to the expectations. Can recommend both the inverter and the store

Jordan

08/10/2021

Fronius Symo 10 kw Inverter 10.0-3 208240L Advanced

I’ve seen a few inverters fail not long after the warranty’s end. For this model you can extend the warranty up to 20 years with a few clicks on the Fronius website, which is exactly what I’ve been looking for

Steven C.

08/04/2021

Fronius Primo 10kW Inverter FRO-P-10.0-1-208-240

Great 10 year warranty that shows the confidence of the manufacturer in its product. It was a pleasure to work with you, thanks a lot

Milo

08/02/2021

Fronius Primo 12.5 kW Inverter

Great inverter, but software could be better. Spent many hours trying to set up the app to get it working only to have it go offline. Not very intuitive setup. Works 70% of the time and then just goes offline. Then all of a sudden it will connect again.

Jenny and Greg

07/27/2021

Fronius Primo 12.5 kW Inverter

We have this wonderful piece of hardware hooked up to our 10 kW Solar system. Solid, responsive, easy to connect and monitor, what else to say. Happy with the purchase.

K. Watts

07/19/2021

Fronius Symo 10 kw Inverter 10.0-3 208240L Advanced

It replaced a 15 year old inverter also made by Fronius. I noticed that it is much quieter. I also did all the installation myself, so it is a pretty straightforward process. Didn’t have to wait long for delivery and liked the store’s very informative blog

Dave S.

07/12/2021

Fronius Primo 12.5 kW Inverter

Upgraded our old 6.6kw setup to a 12.5kw solar system with a Fronius primo inverter. So far, so good. I love being able to monitor the stats in realtime through the app.

Skyler Barns

06/15/2021

Fronius Symo 10 kw Inverter 10.0-3 208240L Advanced

It’s a very reliable and functional inverter, I say that after working with Symos for years.

Joe Traveler

06/02/2021

Fronius Primo 10kW Inverter FRO-P-10.0-1-208-240

It is a nice solidly built unit with lots of advanced features. Hope it functions well for long

Nine

04/21/2021

Fronius Primo 3.8kW Inverter 3.8-1

Nice and small. Love the design. The service was good too!

Ben

11/25/2020

Fronius Primo 7.6kW Inverter FRO-P-7.6-1-208-240

These guys conduct business exactly the way it’s supposed to be done. We did it a fair bit of research on different outfits in Central Texas, and met with several folks. What stood out about this company was the no-pressure approach, transparent pricing, communication, and all around professionalism

Joe

11/21/2020

Fronius Primo 3.8kW Inverter FRO-P-3.8-1-208-240

FANTASTIC customer service! I originally called another solar installation company, and after having them NEVER return my phone calls, I decided to give A1 solar a call. I’m SO glad I did! Everyone is extremely knowledgeable and helpful.

Ken

11/06/2020

Fronius Primo 8.2kW Inverter FRO-P-8.2-1-208-240

A1 solar is a very professional and knowledgeable organization. Their staff is very knowledgeable, experienced, and thorough. We would definitely use them again.

Patric

11/01/2020

Fronius Primo 7.6kW Inverter FRO-P-7.6-1-208-240

Very professional, great help finding the right product for building.

Joe

10/19/2020

Fronius Primo 15kW Inverter FRO-P-15.0-1-208-240

We had a really great experience with this service. I’d recommend them to anyone who’s thinking about solar.

Joseph

10/17/2020

Fronius Primo 6kW Inverter FRO-P-6.0-1-208-240

I had an extremely pleasant experience with you guys. Simple, responsive, informative, and brilliantly executed. Highly recommended if you are shopping for solar. Thank you.

John

10/09/2020

Fronius Symo 12 kW Grid-tie Inverter 12.0-3 208-240

Professional, reliable and responsive. Highly Recommended!

Matt

10/09/2020

Fronius Symo 15 kW Grid-tie Inverter 15.0-3 208

I appreciated the very quick responses to all questions and concerns even in the evenings and on weekends.

Matthew

09/28/2020

Fronius Primo 5kW Inverter FRO-P-5.0-1-208-240

We have been pleased with A1 solar and our system which is providing power for our business.

Christian

08/26/2020

Fronius Primo 5kW Inverter FRO-P-5.0-1-208-240

Great service and communication! Honest salespeople, good value.

Kenny

08/06/2020

Fronius Primo 15kW Inverter FRO-P-15.0-1-208-240

I was very pleased with my purchase. The information provided by a salesman was instrumental in my decision with which inverter to use. It saved me a lot of time and hassle having to deal with different sales people. They were friendly and knowledgeable and took the time to explain what inverter will be good for my needs.

Aaron

08/03/2020

Fronius Symo 24kW Inverter FRO-SA-24.0-3-480L Advanced

Had a great experience for a first time solar person. They answered all my questions in a timely manner. Thank you.

Nicholas

07/28/2020

Fronius Primo 8.2kW Inverter FRO-P-8.2-1-208-240

Very professional group of folks. Everyone was helpful. Thanks so much. I’m a month in and already ahead of my daily usage!

Jan

07/22/2020

Fronius Symo 24kW Inverter FRO-SA-24.0-3-480L Advanced

Really attentive and knowledgeable crew, and support staff. Excellent communicators; great ethics and transparency with the customer.

James

07/09/2020

Fronius Primo 3.8kW Inverter FRO-P-3.8-1-208-240

Not knowing much about inverter myself, they explained everything I had questions about. I feel confident that they set me up with a good system.

Peter

06/29/2020

Fronius Symo 12 kW Grid-tie Inverter 12.0-3 208-240

We bought a system couple of months ago. It’s currently providing about half of our monthly demand. Our system is somewhat limited by lack of roof space and the orientation of our property but I feel like are getting as much as possible out of it .

Gregory

06/29/2020

Fronius Primo 6kW Inverter FRO-P-6.0-1-208-240

The company was professional and courteous. We enjoyed working with them.

Don

03/24/2020

Fronius Symo 15 kW Grid-tie Inverter 15.0-3 208

Excellent customer service Our electric bills are down to the basic service charge of around $11 per month.

Matt

10/09/2020

I appreciated the very quick responses to all questions and concerns even in the evenings and on weekends.

Don

03/24/2020

Excellent customer service Our electric bills are down to the basic service charge of around $11 per month.

Ahmed Salman

08/04/2021

Can I get a delivery to Naperville, IL?

A1 SolarStore

Sure. We deliver anywhere in the US.

Hot Rod Wash Ltd

07/22/2021

Is this inverter field-serviceable? Can it be installed on the roof?

A1 SolarStore

You can mount it anywhere you want, including the roof. It is designed to be fully field-serviceable. Instead of replacing the inverter, you can just go up on the roof to exchange a small spare part that you need.

Specification

Phases	Three-Phase
AC Output Voltage	208 VAC
Max Input PV Voltage	1000 Voc
Features	Communication Module Indoor Inverter Monitoring System Outdoor Inverter
Dimensions LxWxH	20.1 x 8.9 x 28.5 in
Weight	78.3 lbs
Manufacturer	Fronius USA LLC
Manufacturer Part #	15.0-3/208
Operating Temperatures	–40°F to 140°F

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Attachments

Datasheet

About product

The Fronius Symo 15.0-3 208 String Inverter is a powerful and reliable three-phase inverter engineered for medium to large commercial solar applications. With its transformerless design, advanced monitoring capabilities, and compliance with modern safety standards, the Symo 15.0-3 208 delivers high efficiency, installation flexibility, and long-term durability in demanding environments.

15 kW three-phase string inverter for commercial and industrial PV systems
Single MPP tracker for streamlined array configuration
Integrated DC disconnects for simplified wiring and maintenance
Advanced AFCI arc-fault protection and 2014 NEC compliance
Ground fault protection with isolation monitoring for maximum safety
Wi-Fi and SunSpec Modbus communication for seamless system monitoring
NEMA 4X rated for indoor or outdoor installation in any environment
High 97.3% peak efficiency and 96.5% CEC efficiency for optimal energy yield

Flexible design for commercial applications

The Fronius Symo 15.0-3 208 features a compact, lightweight design that simplifies installation and system integration. Its SnapINverter mounting system allows quick and secure setup on rooftops, carports, or ground-mount systems, while the wide DC input voltage range (325–850 V) provides exceptional flexibility in array configuration.

Safety and code compliance built-in

Designed to meet NEC 2014 and UL 1741 standards, the Symo 15.0-3 208 ensures full compliance with U.S. safety and interconnection requirements. Integrated DC disconnects, AFCI protection, and ground fault monitoring protect both equipment and personnel, ensuring reliable and safe operation throughout the inverter’s lifespan.

Smart data communication and control

Equipped with built-in communication interfaces, the Symo 15.0-3 supports Wi-Fi, Ethernet, Modbus TCP, JSON, and RS422 connections for seamless integration with Fronius Solar.web and third-party monitoring platforms. Installers can easily configure, update, and monitor inverter performance remotely for improved system uptime and lower maintenance costs.

High efficiency and dependable performance

With up to 97.3% maximum efficiency and 96.5% CEC-rated efficiency, the Fronius Symo 15.0-3 208 ensures excellent power conversion and energy production. Its transformerless design, variable-speed cooling fan, and robust NEMA 4X enclosure provide long-term reliability even in harsh weather conditions.

Size

20.1" x 8.9" x 28.5"

Weight

78.3 lb

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