The Sofar Solar ESI-6.5K-T1 is the 6.5 kW three-phase hybrid inverter from the ESI range, designed for homes and small businesses connected to a 380/400/415 V three-phase supply. It stands out thanks to its three independent MPPT trackers, its IP66 rating and its fanless passive cooling system — making it completely silent.
The Sofar Solar ESI-6.5K-T1 is the 6,500 W three-phase hybrid inverter from the ESI range. It is designed for homes connected to a 400V three-phase supply with an annual consumption of 6,000 to 12,000 kWh, for small businesses requiring uninterrupted power supply, and for any installation with multiple roof sections to be utilised. With 3 fully independent MPPT trackers, an IP66 rating and fanless passive cooling, it is the most versatile and robust choice in the ESI range.
In Belgium and France, many detached houses over 150 m², farms, small businesses and apartment blocks are connected to a three-phase 380/400/415V supply. A single-phase inverter in this configuration would only cover one of the three phases — the ESI-6.5K-T1 powers all three simultaneously, which allows:
The ESI-6.5K-T1 features 3 fully independent MPPT trackers, each with a dedicated string (25A, range 160–950V, max voltage 1000V). It is the only ESI inverter to offer this architecture, which allows:
The ESI-6.5K-T1 has an IP66 rating — total protection against dust and powerful water jets — superior to the IP65 rating of single-phase models. Combined with its fully passive cooling via natural convection (zero fans), it offers:
The ESI-6.5K-T1 is compatible with Sofar BTS 5K batteries (LiFePO4 CATL, integrated BMS, 350–435V). From 1 to 6 modules in parallel for a capacity of 5 to 30 kWh — without changing the inverter.
| BTS 5K modules | Total capacity | Typical usage |
|---|---|---|
| 1 module | 5.12 kWh | Basic backup, partial night |
| 2 modules | 10.24 kWh | Full family home |
| 3 to 4 modules | 15–20 kWh | Large house or small business |
| 5 to 6 modules | 25–30 kWh | Maximum range, commercial use |
→ See the Sofar BTS 5K battery
With 20 to 26 panels (10 to 13 kWp) and a 10 to 20 kWh battery, a large house or small business can achieve 70 to 85% self-consumption, representing an estimated saving of between €1,100 and €2,000 per year.
Wi-Fi and LAN are built-in as standard — no additional dongle required for basic monitoring. A 4G option is available. The SolarMan Smart app (iOS / Android) allows you to:
→ Download from the App Store | → Download from Google Play
Installation must be carried out by a qualified electrician. Key points:
SofarSolar is redefining the future of energy with smart inverters. Equipped with advanced monitoring features, our inverters come with a WiFi Stick as standard, paving the way for seamless connectivity. Choose your path to efficiency with options such as Ethernet, GPRS or LTE dongles. Transform every installation into a digital symphony, where solar power becomes a connected, smart and sustainable experience. SofarSolar, your partner for smarter and brighter energy.
Android - Google Play - Solarman Smart
Setup steps:
1. After launching the app, register as a new user or enter your current SOLARMAN login details.
2. Create a new system and save the system data.
3. Scan the barcode on the logger stick to assign an inverter to the system.
4. Go to the newly created system to configure the logger stick (device/logger).
5. Press the button on the WiFi dongle for 1 second to activate the dongle’s WPS mode so that the smartphone can connect to the WiFi dongle.
6. Now select your local WiFi network for internet access and enter your WiFi password.
7. The WiFi dongle is now configured with the access details.
The Sofar Solar ESI-6.5K-T1 is more than just an inverter: it is the heart of your energy self-sufficiency. With its 6.5 kW power output, scalable storage and responsiveness, it ensures your home is always powered, more economical and more environmentally friendly.
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Hybrid Inverter Sofar Solar Three-Phase 6.5 kVA – ESI-6.5K-T1 by Sofar Solar is available in our Hybrid inverters catalog. Technical specifications: inverter power in va: 6500 VA, operating temperature: -30°C to +60°C (derating above +45°C), voltage: 350–435 V, phase: Triphasé, number of mppt: 3 MPPT, load current: 25 A, ip protection: IP 66, inverter type: Hybrid, max. recommended pv input power: 13000 Wc, starting voltage: 200V, nominal mains voltage: 3(N)~+PE, 380/400/415 Va.c., type of cooling: Natural convection - No fan, thdi (nominal power) : inférieur à 3 %, maximum discharge current: 19,5 A, weight: 30 kg, dimensions (l x w x d) : 708 x 440 x 170 mm, maximum input voltage: 1000 V, communication: Wi-Fi, LAN, RS485, CAN, optional 4G, european weighted efficiency: 97,0 %, nominal input voltage: 600 V, maximum efficiency: 98%, nominal battery voltage: 350 - 435 V, rated ac power: 6500 W, nominal apparent ac power: 7150 VA, ac apparent power max.: 7150 VA, switching time: +10 ms, nominal frequency: 50/60Hz, mppt voltage range: 160 - 950 V, pv input current: 25 / 25 / 25 A, number of mppt / strings per mppt: 1 / 1 / 1. Product weight: 30.0 kg. Reference: ESI-6.5K-T1.
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