The SMA Sunny Boy series comprises on-grid (grid-tie) inverters designed for domestic PV installations, where stable operation, rapid commissioning, and convenient handling are key. Depending on the variant, the device offers one or more MPPT trackers, facilitating the design of installations with modules on different roof pitches and helping to better utilize the yield under partial shading. High European efficiency means the inverter maintains good performance even in Poland's typical operating conditions, not just ideal laboratory points - translating into a real annual energy yield.
For monitoring and configuration, the series utilizes SMA solutions, including the Sunny Portal and remote diagnostics features of SMA Smart Connected, capable of alerting service events in advance. Communication can include network interfaces (such as WiFi or Ethernet - depending on the version), and integration with an energy management system facilitates self-consumption. The devices meet required grid connection standards and come with a manufacturer's warranty, with an option for extension.
Ranking
Price offers
| Shop | Country | Price | Per kW | Stock | Offer updated | Link to shop |
|---|---|---|---|---|---|---|
| www.solaris-store.com | France | 919 € incl. VAT | 459.50 €/kW | Not stated | 21h ago | Visit shop |
Specifications
Pros and cons
The ShadeFix algorithm (OptiTrac Global Peak) reduces power losses under partial shading conditions by up to 25%, eliminating the need to install costly power optimizers (SolarEdge, Tigo). For a typical residential prosumer system with partial shading, this translates to tangible savings at the investment stage while maintaining a comparable annual energy yield.
The Smart Connected service monitors inverter operation 24/7 and automatically notifies the installer of service events before the end user is even aware of an issue. Under this program, SMA commits to dispatching a replacement unit in the event of a fault with minimal administrative burden, reducing system downtime.
Sunny Boy series inverters achieve a European efficiency of 97.2-98.7%, depending on the model, placing the series among the top performers in the single-phase residential class. European efficiency - weighted for a typical Central European irradiance distribution - is a more meaningful benchmark than peak laboratory efficiency and directly correlates with higher annual energy yield under real-world conditions in Poland.
SMA Solar Technology has been operating since 1981 and is one of the few European inverter manufacturers with an authorized service network in Poland. This ensures availability of spare parts and certified installers - a critical factor when planning for a PV system service life of 20-25 years.
The standard 5-year warranty is automatically extended to 10 years upon free online registration within 12 months of installation. Paid extension packages are available to stretch coverage to 20 years - a premium-tier differentiator given that inverter service life is increasingly expected to match that of the PV modules themselves.
The standard warranty period is 5 years, whereas Huawei SUN2000 and GoodWe offer 10-year standard warranties with no registration required. Although SMA provides a free extension to 10 years upon registration, this requires proactive action on the part of the system owner and is contingent on maintaining an internet connection (Sunny Portal).
In Poland, Sunny Boy series models (on-grid, single-phase) are priced noticeably above comparable-capacity units from Sungrow (e.g., SG5.0RS) or Huawei SUN2000-5KTL-L1, with retail price differences reaching 20-35%. For installers working on price-sensitive projects, this premium may effectively rule SMA out at the quotation stage.
Alternatives
About the Sunny Boy series
These answers cover the whole series. Where a figure differs, the specification above is this model's own.