Fronius 12.5kW Primo Inverter, 240VAC, 1-Phase, 260 - 480 VDC MPPT
The Fronius Primo 12.5kW inverter is a high-performance, single-phase solar inverter engineered for residential and light commercial use. Operating at 240VAC with a broad 260 – 480 VDC MPPT range, this powerful unit combines flexibility, efficiency, and advanced safety features to deliver top-tier energy conversion for modern PV systems.
Its transformerless design and intuitive SnapINverter mounting system make installation simple and quick, reducing labor time and cost. With dual independent MPPTs, it supports complex rooftop configurations while ensuring maximum power harvest throughout the day.
Built-in Wi-Fi, Modbus communication, and full compatibility with Fronius Solar.web and other monitoring solutions make real-time system management easy. The Primo is also smart grid ready, equipped with Arc Fault Circuit Interruption (AFCI) and rapid shutdown support, meeting today’s toughest safety and regulatory standards.
Key Features
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SnapINverter Technology
Innovative mounting system allows for tool-free servicing and fast installation.
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Dual MPPT & Broad Input Range
Supports flexible array designs with two independent MPPTs and a 260 – 480 VDC range.
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Integrated Communications
Built-in Wi-Fi, Modbus, and Solar API for seamless integration and system monitoring.
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Smart Grid Ready
Compliant with evolving grid codes, including voltage and frequency ride-through.
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Advanced Safety
AFCI built-in with support for code-compliant rapid shutdown systems.
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Active Cooling
Temperature-regulated fan system enhances longevity and performance in high-heat conditions.
Specifications
Product Specifications
| Input Data |
| Number of MPP trackers |
2 |
| Recommended PV Power (kWp) |
10.0 - 15.0 kW |
| Max. usable input current |
33.0 / 18.0 A |
| Max. usable input current total |
51 A |
| Max. array short circuit current |
49.5 / 27 A |
| Nominal input voltage (Udc,r) |
425 V |
| DC input voltage range |
80 - 600 V |
| MPP voltage range |
260 - 480 V |
| Max. input voltage |
1000 V |
| Integrated DC string fuse holders |
4- and 4+ for MPPT 1 / no fusing required on MPPT 2 |
| Output Data |
| Max. output power 240 V |
12.5 kVA |
| Max. output power 208 V |
12.5 kVA |
| Output configuration |
1~ NPE 208 / 240 V |
| Frequency range |
45 - 66 Hz |
| Frequency |
60 Hz |
| Total harmonic distortion |
< 2.5 % |
| Power factor range |
0 - 1 ind./cap. |
| Max. continuous output current 240 V |
52.1 A |
| Max. continuous output current 208 V |
60.1 A |
| OCPD/AC breaker size 208 V |
80 A |
| Max. efficiency |
97.9 % |
| CEC efficiency 240 V |
96.5 % |
| General Data |
| UL safety standards & network regulations |
UL 1741-2015, UL 1998, UL 1699B Issue 2-2013 |
| Certificates and compliance |
UL 1741-2010 Second Edition (incl. SA 2016-09), IEEE 1547-2003, NEC 2017, CSA TIL M-07 Issue 1 -2013 |
| Dimensions (W x H x D) |
Shipping & Returns
Shipping & Returns Overview
Order Confirmation:
As soon as you place your order, you will receive an order confirmation email. This email confirms that we have received your order in our system and pre-authorized your credit card for the purchase. As soon as we receive your order, we will start our fulfillment process. All orders are processed and shipped within 1-2 business days. Transit times vary from 5-7 business days.
Order Shipment:
We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at support@ecogridsupply.com.
No Shipping outside the USA.
Shipping Options:
Expect your order to arrive in 5 to 7 days. We offer free shipping for orders over $200. For orders below $200, a flat shipping fee of $15 applies.
Please note that we currently only ship within the United States. International shipping is not available.
The majority of our orders are dispatched via third-party freight carriers (18-wheelers). In case your order includes an item that requires freight shipping, we will contact you to schedule a curbside delivery. Ensure that your contact number is correct at checkout.
Returns & Refunds:
We accept returns and refunds within 30 days of your order being delivered to you. If your delivery is within the 30 day return and refund period please see our “Return Policy” in the footer of our website.
Why Buy From Us
Why Buy From Ecogrid Supply?
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Authorized & Trusted Dealer: We’re fully authorized for every brand we carry, so you get genuine products with full manufacturer warranties.
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Fast, Reliable Shipping: All items ship from our U.S. warehouses with quick and dependable freight options to keep your project on track.
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30-Day Hassle-Free Returns: Change your mind? No worries — enjoy a simple 30-day return process for peace of mind.
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Real Human Support, 7 Days a Week: Reach us by phone, email, or live chat — no bots, no overseas call centers, just real people who know off-grid power systems.
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Expert Energy Guidance: Our solar and backup energy specialists are ready to help you with design, planning, product questions, and installation tips.
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USA-Based Service: Our team proudly operates here in the United States, providing local, knowledgeable, and friendly support.
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Secure Payments: Shop confidently with our encrypted, secure checkout to protect your personal and payment information.
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Built for Energy Independence: Whether you’re powering a cabin, prepping for emergencies, or going off-grid, our products are selected for performance, reliability, and sustainable operation.
