The GoodWe ES Uniq series are single-phase hybrid inverters designed for home installations where high self-consumption, battery storage integration, and reliable backup power are essential. In practice, they can operate on-grid but can seamlessly switch to off-grid mode - with an automatic switch to backup in standard UPS mode - which is beneficial during unstable grid conditions. These devices also support microgrids and system expansion through parallel operation, simplifying installation scaling.
Depending on the variant, they feature either 1 or 2 MPPT inputs - an additional tracker helps extract more energy from panels with different orientations or partial shading, as each string operates at its optimal point. The high European efficiency means better real-world energy production under variable weather conditions, not just in the lab.
Monitoring is convenient: an easy-to-read display, app, and WiFi/Ethernet connectivity. The ES Uniq communicates with BMS via CAN and is compatible with a wide range of batteries. Additional benefits include optional AI-driven AFCI, high sealing class, and compliance with grid requirements and certifications for the EU market.
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Specifications
Pros and cons
The switchover time to the backup power source is less than 4 ms, which meets the strict standard for industrial-grade UPS (IEC 62040-3 VFI class). In comparison, most mid-range hybrid inverters switch over in 10-20 ms, which can cause sensitive electronic devices to reset.
The maximum efficiency is 97.6%, and the European efficiency (weighted according to the EU's solar profile) is 96.2% - a result above the average for single-phase hybrid inverters (LV), where the median of the segment is approximately 95.5-96.0%. MPPT at 99.9% indicates minimal losses during tracking of the maximum power point.
The inverter accepts DC power up to 200% of its nominal AC power (e.g., up to 24 kWp of PV for a 12 kW system), which allows for optimized energy generation during morning and afternoon hours without a proportional increase in inverter costs. This is a significant advantage when roof space is limited and there is good sun exposure.
The series supports a microgrid with parallel operation for up to 16 units, enabling the system to be scaled to a total AC power of 192 kW (at a 12 kW variant) without requiring changes to the control infrastructure. Direct competitors in this class, such as Solis RHI, typically limit parallel connection to 6-8 units.
The 3-in-1 enclosure integrates a generator, a backup circuit, and smart load connections into a single port, simplifying wiring and configuration. With an IP66 degree of protection and an operating temperature range of -35°C to +60°C, it ensures reliability even in harsh climatic conditions typical of Poland (frost, summer heat, humidity).
The ES Uniq series only works with low-voltage (LV) batteries (typically 48-100 V), and does not support high-voltage (HV) systems (200-800 V). HV batteries achieve a round-trip efficiency of 95-97%, while LV systems typically have an efficiency of 90-93%. This difference, when considering a daily charging/discharging cycle, translates into a significantly lower annual self-consumption rate.
Alternatives
About the ES Uniq series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.