The Deye SUN-SG01LP1-EU series are hybrid single-phase inverters designed for installations where self-consumption, energy storage integration, and the ability to maintain power supply to selected circuits are key considerations. Thanks to multiple MPPT trackers, it's easy to optimise panels on different roof sections or in partially shaded areas - the inverter independently maximises the performance of each string, stabilising energy yield throughout the day.
High European efficiency means the device maintains excellent performance in typical operating conditions encountered in Poland, translating into real energy production, not just a "laboratory" result. This series works with popular energy storage systems (including BMS), facilitating the expansion of the system with batteries without reconfiguring the installation.
On a daily basis, you benefit from monitoring and communication - remote viewing in the app and integration via network modules (e.g., WiFi or Ethernet). Plus, mandatory safety features, compliance with grid connection standards, and the manufacturer's guarantee are included. This is a sensible choice for homes and small commercial properties.
Ranking
Price offers
| Shop | Country | Price | Per kW | Stock | Offer updated | Link to shop |
|---|---|---|---|---|---|---|
| www.hlumar.sk | Slovakia | 1 220 € incl. VAT | 152.50 €/kW | In stock | 8h ago | Visit shop |
| Sklep Soltech | Poland | 5 899.52 zł net | 737.44 zł/kW | Not stated | 19h ago | Visit shop |
| solu-sun.fr | France | 2 004.50 € incl. VAT | 250.56 €/kW | In stock | 22h ago | Visit shop |
Specifications
Pros and cons
The series features 2 independent MPPT trackers with tracking efficiencies exceeding 99%, allowing for the connection of strings with different azimuths and roof angles without any mutual losses. Competitive single-phase LV inverters in this power range (e.g., Growatt SPH) often offer a similar function, but Deye achieves this with higher conversion efficiency.
European efficiency (weighted efficiency) at 96.5% and a maximum of 97.6% places the series above the median efficiency of single-phase hybrid inverters in the LV (low voltage) class (typically 95-96.5%). In the Polish climate, where on-site generation plays a significant role in annual energy production, this difference is meaningful - it's not just a laboratory result.
The inverter supports low-voltage batteries (40-60 V) (LiFePO4, AGM) via a CAN/RS485 BMS port, and Deye publishes an official list of approved batteries (updated in 2025). This allows for system expansion with popular storage solutions such as Pylontech, BYD, or Deye BOS-G without the need for additional interface modules.
The built-in EPS (Emergency Power Supply) function switches power to selected circuits during a power outage, measured in milliseconds - comparable to an online UPS. It does not require an external STS switch; it is possible to power critical circuits without interruption that would be noticeable to sensitive devices (e.g., NAS, routers, pumps).
The IP65 enclosure with active air cooling allows for outdoor or unheated boiler installation. The operating range of -40…+60°C exceeds the conditions of the Polish climate with a comfortable margin, reducing the risk of overheating in the summer and freezing in the winter.
The standard manufacturer warranty is 5 years, while Fronius offers a 10-year warranty as standard (up to 20 years with an extended warranty), and SolarEdge offers a 12-year warranty. For installations designed for 20-25 years of operation, a shorter warranty period means a greater risk of incurring maintenance costs or the need to purchase an extended warranty from a distributor.
The maximum DC input voltage is 500 V, which, with common 410-450 Wp (Voc ~37-41 V) modules, limits the string to approximately 12 panels in series. Many competing hybrid inverters of this power class (e.g., Sungrow SH, Sofar HYD) accept up to 600 V DC, which provides greater design flexibility and lower transmission losses.
Alternatives
About the SUN-SG01LP1-EU series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.