Sofar Solar Mono 4.6 kW Hybrid Inverter – ESI-4.6K-S1

Sofar 4.6 kW solar inverter: Maximum efficiency and versatility

The Sofar ESI-4.6K-S1 hybrid inverter: 4.6 kW with the peak power of a 7 kW unit

The Sofar Solar ESI-4.6K-S1is the 4,600 W single-phase hybrid inverter in the ESI range, positioned between the ESI-4K-S1 (4,000 W) and the ESI-5K-S1 (5,000 W). It is designed for homes of 90 to 140 m² seeking solar self-consumption with scalable storage. Its most notable specification is its off-grid peak power of 6,900 VA for 10 seconds — 150% of its rated power — making it exceptional for powering appliances with high inrush currents in the event of a power cut. It can operate without a battery from the moment of installation and scale up to 30 kWh of storage without changing the inverter.

What this inverter actually does

• It converts the energy from your solar panels into 230 V AC electricity with a maximum efficiency of 97.7% and a European efficiency rating of 97.0%
• It stores surplus energy in a Sofar BTS 400 V high-voltage battery for use in the evening, at night or during a power cut
• It automatically switches to the battery in the event of a grid outage within 10 ms, with a peak power of 6,900 VA for 10 seconds

With 10 to 14 solar panels (5 to 7 kWp) and a 5 to 10 kWh battery, a house of 90 to 140 m² can achieve 60 to 75% self-consumption, representing an estimated saving of between €650 and €1,050 per year depending on your consumption profile.

Use our simulator for a personalised estimate in 2 minutes.

6,900 Wp of connectable PV: the highest capacity in its power category

This is the number one technical advantage of this model. With a maximum PV power of 6,900 Wp, the ESI-4.6K-S1 can accommodate proportionally more panels than any other 4–5 kW inverter in the ESI range:

• 13 to 17 panels of 400–500 Wp distributed across the 2 independent MPPT trackers (range 85–520 V, max 550 V, 16 A per MPPT)
• PV over-panelling ensures maximum output during periods of low sunlight — mornings, evenings and cloudy days
• Two independent MPPT controllers allow you to manage two different roof orientations (east/west or south/east) without any loss of efficiency
• More panels = more kWh generated per year = greater savings on your bill

6,900 VA off-grid peak power: the inverter that never lets you down

In the event of a mains power cut with a battery connected, the ESI-4.6K-S1 can deliver 6,900 VA for 10 seconds — that is 150% of its rated power of 4,600 VA. This is one of the best peak-to-rated power ratios in the ESI range. This reserve allows even the most demanding appliances to start up without difficulty:

• Fridge and freezer (start-up peak up to 5× the rated power)
• Washing machines during the start-up and spin cycles
• Domestic water pump or booster pump
• Compact electric water heater
• Central vacuum cleaner or power tool

Sofar PowerAll

Sofar BTS high-voltage battery: modern and scalable architecture

The ESI-4.6K-S1 is compatible with the Sofar BTS 5K high-voltage battery system (400 V LiFePO4 CATL):

• Start with 1 BTS 5Kmodule (5.12 kWh) — enough to cover one night’s energy needs for an average household
• Add up to 6 modules to reach 30.72 kWh without changing the inverter
• 400 V high voltage: better conversion efficiency, simplified cabling
• BMS integrated into each module: comprehensive active and passive protection
• Max. charge/discharge current: 20 A — perfectly suited to the 4.6 kW power rating

Sofar PowerAll: scalable high-voltage storage

The ESI-4.6K-S1 is designed to work with the Sofar PowerAll system: from 1 to 6 BTS 5K modules (LiFePO4 CATL, integrated BMS, 400 V high voltage) for a total capacity of 5 to 30 kWh, without changing the inverter.

→ See the Sofar BTS 5K battery

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, 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.

Apple Store - Solarman Smart

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 enter 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.

Advanced functions

• 5 operating modes: priority self-consumption, off-peak hours, full sale, battery reserve, off-grid autonomous
• AC Coupling: integrate an existing grid-connected inverter to charge the battery without replacing the installation
• Parallel function: two ESI-4.6K-S1 units in master/slave mode for a total power output of 9.2 kW
• OTA updates: remote software updates, without physical intervention

Installation: what you need to know

Installation must be carried out by a qualified electrician. Key points:

• Operates without a battery immediately upon installation
• Main circuit breaker rated for 4.6 kW single-phase (minimum 20 A)
• Battery cabling rated for 20 A — standard cross-section sufficient
• Commissioning viathe SolarMan Smart app or the built-in display
• The "Phase" field on the technical data sheet must be completed: Single-phase