Sofar Solar Tri 12 kW Hybrid Inverter – ESI-12K-T1

Sofar Solar ESI-12K-T1 – 12 kW three-phase hybrid inverter, the most powerful model in the ESI-T1 range

The ESI-12K-T1 in the ESI-T1 range

The Sofar Solar ESI-12K-T1 is the 12,000 W three-phase hybrid inverter — the flagship of the ESI-T1 range. It shares the same architecture as the ESI-6.5K-T1 and the ESI-10K-T1 — same housing (708×440×170 mm, 30 kg), the same three independent MPPT trackers, the same IP66 rating, and the same passive cooling — but with a maximum rated power of 12 kW and 24,000 Wp of connectable PV capacity.

⚠️ For Belgium: only the ESI-6.5K-T1 can be installed as a three-phase system in Belgium. The ESI-12K-T1 is reserved for France, Luxembourg and other markets.

24,000 Wp of connectable PV: up to 60 panels

With 3 fully independent MPPT controllers (range 160–950V, max 1000V, 25A each, 1 string per MPPT), the ESI-12K-T1 can accommodate up to 24,000 Wp of panels — equivalent to approximately 48 to 60 panels of 400–500 Wp spread across 3 different orientations. This is the highest PV capacity in the entire ESI-T1 range, ideal for:

• Large roofs on detached houses or farmhouses (over 200 m² of available roof space)
• Car park canopies or agricultural shelters
• Installations requiring a high PV/power ratio (200%) to maximise output during periods of low sunlight

IP66 and passive cooling: robust and silent

Like the entire ESI-T1 range, the ESI-12K-T1 features an IP66 rating and fully passive cooling via natural convection (zero fans):

• Completely silent operation, even at full load of 12 kW
• Can be installed outdoors under a canopy or in an unheated room
• Temperature range: -30°C to +60°C (derating above +45°C)
• Extended service life thanks to the absence of moving mechanical parts

What this inverter actually does

• It converts solar energy into 400V AC three-phase electricity with a maximum efficiency of 98.2% (EU 97.5%)
• It stores surplus energy in the BTS battery for use in the evening or during a mains power cut
• It automatically switches to battery power within 10 ms in the event of a power cut
• It feeds surplus energy back into the three-phase grid (France, Luxembourg)

With 40 to 48 panels (20 to 24 kWp) and a 15 to 30 kWh battery, a large farm or SME can achieve 75 to 88% self-consumption, representing an estimated saving of between €2,500 and €5,000 per year.

Compatible battery: Sofar BTS 5K high-voltage

Compatible with Sofar BTS 5K batteries (LiFePO4 CATL, integrated BMS, 350–435V). From 1 to 6 modules for 5 to 30 kWh of scalable storage without changing the inverter.

→ See the Sofar BTS 5K battery

Advanced features

• 5 operating modes: self-consumption, Time of Use, full sale, battery reserve, off-grid — comprehensive guide to modes
• AC Coupling: integrate an existing three-phase grid inverter — AC Coupling guide
• Integrated EMS: automatic management between panels, grid, battery and consumption
• RemoteOTA updates

Installation

• ⚠️ Not available for installation in Belgium — available only in France, Luxembourg and other markets
• 380/400/415V three-phase grid required
• 4-pole main circuit breaker (minimum 25A per phase)
• Battery cabling rated for 30A
• Operates without a battery upon installation
• See the BTS battery configuration guide on ESI

SolarMan Smart

SofarSolar is redefining the future of energy with smart inverters. Equipped with advanced monitoring features, our inverters come with a WiFi Stick as standard for seamless connectivity. Choose your connection method: Ethernet, GPRS or LTE. Transform every installation into a connected, smart and sustainable experience.

Apple Store - Solarman Smart

Android - Google Play - Solarman Smart

Setup steps:

1. After launching the app, register or log in to your SOLARMAN account.
2. Create a new system and enter the required details.
3. Scan the barcode on the logger stick to pair the inverter.
4. Configure the logger in the newly created system.
5. Press the button on the WiFi dongle for 1 second to activate WPS mode.
6. Select your local WiFi network and enter your password.
7. The WiFi dongle is now configured.

The future of energy in your home

The Sofar Solar ESI-12K-T1 is more than just an inverter: it is the heart of your energy self-sufficiency. With its 12 kW power output, scalable storage and responsiveness, it ensures your home is always powered, more economical and more environmentally friendly.