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Sofar Solar ESI 5K-S1 Hybridinverter 5 KW 1 Phases 2 MPPT
The SOFAR ESI-5K-S1 is a 5 kW single-phase hybrid inverter with a wide MPPT window (≈85–520 Vdc), 550 Vdc max DC input and native support for 400 V BTS battery modules. Compact, IP65-rated and equipped with LCD + app monitoring, it delivers UPS capability (≈10 ms) and short-term peak output for reliable residential PV + storage installations.
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Performance data
DC
| Power | 7,5 KW |
| Power max. | 7,5 KW |
| Current | 16,0 A |
| Current Max. | 32,0 A |
| Voltage | 360,0 V |
| Voltage Max. | 550,0 V |
| MPPT | 2 |
| String Inputs | 2 |
AC
| Power | 5,0 KW |
| Power max. | 5,0 KW |
| Current | 20,0 A |
| Current Max. | 20,0 A |
Dimensions
| length | 708 mm |
| width | 170 mm |
| Height | 410 mm |
| weight | 23 kg |
Manufacturer warranty
| Product warranty | n/a |
Certificates
Polish
| Data Sheet |  |
| Guarantee | |
English
| Manual | |
SOFAR ESI-5K-S1 – 5,000 W, single-phase hybrid inverter
The SOFAR ESI-5K-S1 is a compact single-phase hybrid inverter rated 5.0 kW (continuous) for residential PV + storage systems. It features 1 MPPT with an MPPT window of ≈85–520 Vdc, a maximum DC input of 550 Vdc, recommended maximum PV power 7,500 Wp, native battery support at 400 Vdc (BTS 5K modules) and integrated UPS/backup capability (default transfer time ≈10 ms, peak apparent power ≈5.5 kVA for 60 s). The unit is IP65 rated, measures 708 × 410 × 170 mm and weighs ≈22.5 kg — designed for flexible wall or floor mounting and simple commissioning.
✅ Benefits for installers
• Right-sized for homes (5 kW) – continuous 5.0 kW output suits typical single-family loads and backup needs.
• PV oversizing support (up to 7.5 kWp) – allows slightly oversized PV arrays to increase self-consumption.
• Wide MPPT window (≈85–520 Vdc) – compatible with modern large-format modules and longer strings for easier string design.
• Integrated battery & UPS functions – designed for SOFAR BTS 5K modules (400 Vdc) with fast switching for critical loads.
• Weatherproof & compact (IP65) – small footprint and outdoor rating give flexible installation locations and reduced BOS.
• Installer-friendly communications – LCD + app plus CAN / RS485 / Wi-Fi (optional 4G / LAN) for easy commissioning and remote monitoring.
• PV oversizing support (up to 7.5 kWp) – allows slightly oversized PV arrays to increase self-consumption.
• Wide MPPT window (≈85–520 Vdc) – compatible with modern large-format modules and longer strings for easier string design.
• Integrated battery & UPS functions – designed for SOFAR BTS 5K modules (400 Vdc) with fast switching for critical loads.
• Weatherproof & compact (IP65) – small footprint and outdoor rating give flexible installation locations and reduced BOS.
• Installer-friendly communications – LCD + app plus CAN / RS485 / Wi-Fi (optional 4G / LAN) for easy commissioning and remote monitoring.
Technical data — SOFAR ESI-5K-S1 (key values)
- Rated AC power: 5,000 W (continuous).
- Max. apparent (short peak): ≈5.5 kVA (60 s).
- Recommended max PV power: 7,500 Wp.
- MPPTs: 1 | MPPT range: ≈85–520 Vdc; Max DC input: 550 Vdc; Start-up 100 Vdc.
- PV input current / Isc: Max input current 16 A | Isc 22.5 A.
- Battery interface / voltage: Compatible with BTS 5K, rated battery voltage 400 Vdc; max charge/discharge current 20 A.
- Backup / transfer time: Default ≈10 ms; EPS / UPS modes supported.
- Dimensions / Weight: 708 × 410 × 170 mm | ≈22.5 kg.
- Ingress / environment: IP65; operating temp charge 0 → +50 °C, discharge −10 → +50 °C; max altitude 4,000 m.
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Comms / monitoring: LCD + App; CAN / RS485 / Wi-Fi; optional 4G / LAN; supports feed-in limiting and smart-meter integration.
Project offer
The SOFAR ESI-5K-S1 is a practical, installer-friendly choice where compact hybrid capability, PV oversizing and integrated UPS are required. It pairs seamlessly with SOFAR BTS battery modules for scalable energy storage and can be sourced through SolarTraders from certified distributors with buyer protection and transparent pricing — register now to request a tailored quote or customer spec sheet.
Sofar Solar
Sofar Solar – Inverter and Storage Solutions for Professionals
Sofar Solar is one of the world’s fastest-growing manufacturers of photovoltaic inverters and energy storage systems. Their products deliver high efficiency, long lifespan, and flexible applications – from residential systems to large-scale solar plants. With wholesale conditions, express shipping, and reliable processing, Sofar Solar provides attractive solutions for professional solar installers.
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