Fronius Primo 12.5 Brings Big Single-Phase Output to Larger Homes
The Fronius Primo 12.5-1 is a 12.5kW transformerless, single-phase string inverter for larger residential and small commercial solar systems on 208V or 240V service. It has two MPPTs, a 1,000V maximum input voltage and built-in Wi-Fi, Ethernet and SunSpec Modbus, so the system can be monitored on Fronius Solar.web from day one. The SnapINverter hinge mounting system makes installation lighter and faster.
Why You'll Love The Fronius Primo 12.5 Inverter
Room for a big array. Fronius recommends 10.0 to 15.0kW of PV, with an 80 to 1,000V operating range and 260 to 800V MPP range.
Two MPPTs. Dual trackers (33A and 18A usable) let you combine different roof faces on one inverter.
Monitoring built in. Wi-Fi, Ethernet, datalogger and webserver are included, with Solar.web, SunSpec Modbus TCP/RTU and JSON.
Built tough. NEMA 4X, indoor or outdoor, -40 to 140°F, with a 10-year warranty extendable to 15 or 20 years.
Your life, with the Fronius Primo 12.5 Inverter
Your roof full of panels feeds one clean, quiet inverter on the garage wall. You check the app at lunch and see the house running on sunshine while the extra flows back to the grid.
The Fronius Primo 12.5 Inverter in a nutshell
12,500VA output
208V or 240V single-phase, 60Hz, under 2.5% THD.
1,000V dual MPPT
Two MPPTs, integrated DC string fuse holders on MPPT 1.
Safety built in
AFCI, rapid shutdown compliant, ground fault protection with isolation monitoring and DC disconnect.
SnapINverter design
Hinge mounting system and PC board replacement concept for easy install and service.
Fronius Primo 12.5 Inverter specifications
Input
-
Recommended PV power: 10.0 to 15.0kWp
-
Max usable input current: 33.0A / 18.0A (51A total)
-
Max array short circuit current: 49.5A / 27.0A
-
Nominal input voltage: 665V
-
Operating voltage range: 80 to 1,000V
-
DC startup voltage: 80V
-
MPP voltage range: 260 to 800V
-
Max input voltage: 1,000V
-
Number of MPPT: 2
Output
-
Max output power: 12,500VA (208V / 240V)
-
Output configuration: 1~NPE 208/240V, 60Hz
-
Max continuous output current: 60.1A @ 208V, 52.1A @ 240V
-
OCPD / AC breaker size: 80A @ 208V, 70A @ 240V
-
Total harmonic distortion: Under 2.5%
-
Power factor range: 0 to 1 ind./cap.
-
Max efficiency: 96.7%
-
CEC efficiency (240V, 600V/1,000V): 96.0% / 96.5%
General
-
Dimensions (W x H x D): 20.1 x 28.5 x 8.9 in
-
Weight: 82.5 lb
-
Protection class: NEMA 4X, indoor and outdoor
-
Topology / cooling: Transformerless / variable speed fan
-
Operating temperature: -40 to 140°F (-40 to 60°C)
-
Elevation: 13,123 ft (4,000 m)
-
Interfaces: USB, 2x RS422 Solar Net, Wi-Fi/Ethernet, datalogger and webserver, RS485 SunSpec Modbus RTU or meter, 6 inputs or 4 digital I/O
-
Certifications: UL 1741 (incl. SA for Rule 21), UL1998, IEEE 1547, IEEE 1547.1, FCC Part 15 A and B, NEC 2017 Article 690, CSA C22.2 No. 107.1-16, UL1699B
-
Warranty: 10 years, extendable to 15 or 20 years
Let the experts help you find your perfect Fronius Primo 12.5 Inverter setup
Send us your panel model, string layout and service voltage and we will check your string sizing, breaker size and rapid shutdown plan for the Fronius Primo 12.5.
Email support@kratopower.com or call +1 888-855-7286.
Fronius Primo 12.5 Inverter documents and materials
Safety disclaimer: Grid-tie inverters connect to solar arrays and the utility grid, both of which carry dangerous voltages. Installation must be carried out by a licensed electrician in line with the NEC, local codes, utility interconnection rules and the manufacturer's instructions. You use this product at your own risk. The content on this page is general product information, not professional or medical advice. If you have any doubt, consult a qualified professional.
