Fronius Primo GEN24 10kW Inverter FRO-P24-10.0-208-240

The Fronius Primo GEN24 10kW is a 10,000W single-phase grid-tie solar inverter designed for residential installations requiring 208V or 240V output, and available through A1 SolarStore as model FRO-P-10.0-1-208-240. Built on Fronius' fourth-generation platform, it combines dual independent MPPT trackers, integrated shade management, a battery-upgrade pathway, and the Fronius Solar.web monitoring platform in a Type 4X enclosure rated for outdoor and indoor installation.

Key specifications

• Rated AC output power: 10,000W @ 240V / 9,450W @ 208V
• Maximum continuous AC output current: 41.7A @ 240V / 45.45A @ 208V
• Maximum DC input voltage: 600V | DC startup voltage: 80V | Operating voltage range: 65–600V
• MPP voltage range (at rated power): 260–480V | Usable MPP range: 65–480V
• Dual independent MPPT trackers: MPPT1 up to 22A / MPPT2 up to 22A; combined max usable DC power: 10,250W
• Max. PV generator output: 13,000 Wpeak (MPPT1) / 15,000 Wpeak (MPPT1 2 combined)
• Maximum inverter efficiency: 97.5% @ 240V | CEC efficiency: 97% @ 240V | MPP adjustment efficiency: >99.9%
• Total harmonic distortion: <3.5% | Power factor: 0.8–1 ind./cap.
• PV Point backup output: 3,120 VA @ 240V / 1,560 VA @ 120V (battery-free daytime backup)
• Battery connection (GEN24 Plus upgrade): 1× DC input, 22A max, 150–455 Vdc range; max AC charging power 10,000W
• Full Backup output (GEN24 Plus): 10,000 VA @ 240V; switching time <45 seconds
• Inverter topology: Transformerless | Protection class: Type 4X
• Dimensions (H×W×D): 23.0 × 20.8 × 7.1 in. (583 × 529 × 180 mm) | Weight: 45.97 lbs. (20.85 kg)
• Operating temperature: -40°F to 140°F (-40°C to 60°C) | Noise: <52 dBA | Max. altitude: 13,123 ft. (4,000m)
• Cooling: Active Cooling Technology (variable-speed fan) | Nighttime consumption: <10W
• Communication: Wi-Fi / 2× Ethernet LAN (Fronius Solar.web, Modbus TCP, JSON API), RS485 (Modbus RTU / Fronius Smart Meter), 6 digital I/O ports; datalogger and webserver included
• Certifications: UL 1741 Third Edition (incl. SA and SB), UL1998, UL1699B:2021, IEEE 1547:2018, IEEE 1547a:2020, ANSI/IEEE C62.41, FCC Part 15 A & B, CSA C22.2, NEC 2017 Article 690 | Made in Austria

Integrated shade management without extra hardware

The Primo GEN24 10kW includes Fronius' Dynamic Peak Manager — a string-level shade optimization algorithm that continuously scans for the true global power peak rather than settling on a local maximum caused by partial shading. Unlike microinverter or DC optimizer approaches, this function is built into the inverter firmware and requires no per-panel hardware. For rooftops with occasional shading from trees, chimneys, or neighboring structures, it recovers yield losses that a conventional string inverter would leave on the table, without the added cost or wiring complexity of module-level power electronics.

PV Point: backup power without a battery

The GEN24 platform includes a dedicated PV Point output that provides up to 3,120 VA at 240V directly from solar generation during a grid outage — no battery required. When the grid goes down and the sun is shining, a designated circuit remains live, covering essential loads such as refrigerators, lighting, or device charging. This is a meaningful advantage for homeowners who want a degree of outage resilience from day one, without committing to the upfront cost of battery storage.

Battery-ready with a software upgrade path

The GEN24 10kW ships as a grid-tie inverter and can be upgraded to full hybrid operation — the Fronius Primo GEN24 Plus — through Fronius' UP.storage software activation. Once upgraded, the integrated battery DC input (150–455 Vdc, 22A max) supports compatible lithium battery systems and enables the Full Backup mode, which provides 10,000 VA at 240V for whole-home coverage during an outage. External grid-switching devices are required for Full Backup operation. This upgrade path protects the initial inverter investment for homeowners who anticipate adding battery storage in the future without replacing the inverter.

Application scenarios

• Residential grid-tie up to 15 kWp: The primary fit — homes with higher consumption, EV charging loads, or large roof areas needing a 10kW single-phase inverter.
• Complex multi-orientation rooftops: Fronius' SuperFlex Design supports strings as short as 3 modules and multiple orientations via dual independent MPPT, accommodating split-exposure roof planes without production compromise.
• Partial-shade environments: Dynamic Peak Manager recovers yield on rooftops with intermittent shading without per-panel optimizers.
• Outage-resilience without battery storage: PV Point provides daytime backup power from day one on a dedicated circuit.
• California Rule 21 and Hawaii Rule 14H: UL1741 SA and SB certification confirms advanced inverter compliance for CPUC and Hawaiian Electric interconnection.
• High-altitude installations: Rated to 13,123 ft. (4,000m) — suitable for Rocky Mountain and Sierra Nevada residential projects.

System compatibility

The Fronius Primo GEN24 10kW is a transformerless, ungrounded string inverter compatible with any standard crystalline silicon PV module string configured within the 260–480V MPP range at rated power, up to the 600V DC input maximum. It does not require DC power optimizers and is optimizer-agnostic when used with them. DC PV connections use spring-type terminals accepting AWG 14–8 copper, with 2× DC 1, 2× DC 2, and 4× DC- inputs accommodating up to two strings per MPPT tracker. AC connections use spring-type terminals accepting AWG 12–6 copper. The Fronius Smart Meter is the recommended companion device for import/export energy management and is required for battery operation in GEN24 Plus configuration. Arc fault circuit interruption (AFCI), DC disconnector, reverse polarity protection, DC insulation measurement, and emergency shutdown (WSD) are all integrated as standard.

Why choose the Fronius Primo GEN24 10kW?

Most 10kW string inverters in this class offer grid-tie operation with no backup capability and no clear upgrade path to storage. The Fronius Primo GEN24 10kW changes that equation: PV Point delivers battery-free daytime backup from day one, the UP.storage software upgrade converts the unit to a full hybrid inverter when the homeowner is ready to add a battery, and Dynamic Peak Manager recovers shade-related losses without module-level hardware. For installers and homeowners who want a single inverter platform that grows from grid-tie to backup-capable to full hybrid without a changeout, it is one of the most future-flexible options available at the 10kW tier.