Sunny Boy Inverters

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Europe's most popular Grid-Connect inverters.

Units can be linked in parallel allowing extreme system design flexibility with the possibility of low cost system expansion and maximum system efficiency. This makes the inverter ideal for use alone or as part of a large PV plant.

To make installation safer and easier, special polarized plug-in SunClix cable connectors are used for DC input and an AC connector for the grid connection.  No special tools are required.

The inverters can be located as close to the PV string as desired (even on the roof, IP65 protection), eliminating long DC wire runs and allowing low DC currents. Connection to the mains is to the house consumer unit.  

Sunny Boy Inverters include a DC isolator, giving savings in both installation time and cost compared to other brand inverters.

Inverters automatically shut down in the event of: High/Low grid AC-voltage; High/Low grid frequency; Grid failure; or Inverter Malfunction. 

Inverters automatically adjust PV array loading to provide maximum efficiency of solar panels by means of a maximal power point tracker (MPPT)


  • Output Voltage Range: 207-264Vac
  • Output Frequency Range: 47.0 -50.5Hz
  • Inverters below 3.6kW are certified to G83/2, larger inverters to G59/3


  • Minimal installation costs 
  • No additional DC isolator required 
  • Best price/performance ratio 
  • High efficiency of >93% even with low power input 
  • Reliability Integrated diagnosis & plant monitoring 
  • Wide operating temperature range (- 25º to + 60ºC ambient) 
  • IP65 protection for outdoor installation
  • Equipped with SunClix connectors for safe and easy installation
  • Five year warranty (options to extend up to 25 years)
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SMA Sunny Boy 1.5 / 2.5 Inverters

The SMA Sunny Boy 1.5 / 2.5 is the perfect inverter for small PV systems. Small, lightweight and filled with features.

Thanks to the broad input voltage range of 80 V to 600 V the inverter is impressively flexible and systems of just 3 solar modules are possible.


  • Integrated WLAN (WiFi) and Speedwire/Webconnect
  • Integrated web server (WebUI), monitor and commission directly from any smartphone or tablet
  • Wide input range, 80 V to 600 V
  • 9.2 kg
SMA Sunny Boy 1.5 2.5
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Product Code Description Retail Price
(ex VAT)
SB-1.5-1VL-40 Sunny Boy transformerless string inverter, 1500W £556.03
SB-2.5-1VL-40 Sunny Boy transformerless string inverter, 2500W £748.31

Sunny Boy Transformerless

Lightweight inverters with unrivalled features. Flexible for use with a wide range of module numbers and types. The installers favourite.

More communicative, user-friendly and efficient than ever these devices set new standards in inverter technology and reliability.

Includes a modern graphic display, to give a readout of daily values, and wireless communication via Bluetooth.

With a peak efficiency of 97% the transformerless design provides optimal solar yield.

Wide DC input voltage range allows excellent module compatability.
The SMA Sunny Boy 3600TL (SB-3600TL), 4000TL  (SB-4000TL) and 5000TL (SB-5000TL) have two maximal power point trackers (MPPT) and so enable use with two separate PV arrays and flexible system design.

Easily accessible front wiring compartment separate from inverter electronics allows cable connection without tools.

SB-4000TL & SB-5000TL use OptiCool construction for optimum performance under full load.

Lightweight with IP65 protection and anti-theft mounting features to allow outdoor installation

RS-485 communcation option can be used to replace Bluetooth is desired.

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Product Code Description Retail Price
(ex VAT)
SB-3000TL-21 Sunny Boy transformerless inverter, 3000W, dual tracker £1,087.71
SB-3600TL-21 Sunny Boy transformerless inverter, 3600W, dual tracker £1,067.77
SB-4000TL-21 Sunny Boy transformerless inverter, 4000W, dual tracker £1,121.16
SB-5000TL-21 Sunny Boy transformerless inverter, 5000W, dual tracker £1,281.32
Product Code Max PV Power DC Input Voltage Max AC Power Weight
SB-3000TL-21 3200 Wp 175 - 500 VDC 3000 W 26 kg
SB-3600TL-21 3880 Wp 175 - 500 VDC 3680 W 26 kg
SB-4000TL-21 4200 Wp 175 -500 VDC 4000 W 26 kg
SB-5000TL-21 5250 Wp 175 - 500 VDC 5000 W 26 kg

SMA Sunny Boy Smart Energy

The SMA Sunny Boy Smart Energy is the heart of the SMA Integrated Storage System. Offering integrated battery storage there is no need to have technical battery knowledge to install it.

  • Integrated Lithium-Ion battery with 2kWh effective capacity
  • Integrated Speedwire/Webconnect for monitoring
  • Graphical display
  • G83/2 (SB-3600SE-10)
  • Requires SMA Energy Meter
SMA Sunny Boy Smart Energy
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Product Code Description Retail Price
(ex VAT)
SB-3600SE-10 SMA Sunny Boy Smart Energy 3600 £4,006.88
SB-5000SE-10 SMA Sunny Boy Smart Energy 5000 £4,141.03