SMA Flexible Storage System

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This system combines automatic load control with energy storage and gives flexibility to both new and existing PV systems as various size battery storage capacities are possible. Either lead-acid or lithium-ion batteries can be used to achieve maximum home power generation and the highest possible consumption of your own power.

Loads can be switched on or battery charged during times of peak generation and power taken from the battery at night or to meet power surges.

Both single phase and three phase systems are possible.

For detailed information see: SMA Smart Home Planning Guidelines

The system consists of

  • A solar inverter - to connect the solar photovoltaic (PV) panels.
  • A Sunny Island inverter/charger - to convert 48 VDC (battery power) to 230V AC (grid power) and vice versa.
  • Sunny Island Speedwire data module for communication.
  • Batteries - to store the energy when it’s generated, for use when it’s needed. Lead acid or lithium ion.
  • Sunny Home Manager 2.0 for monitoring and control of the system - to make a more efficient system and give you information on the distribution of energy.
  • Cabling and switchgear - for efficient and safe operation

Typically a battery store of approximately 5kWh (~200 Ah 48VDC) usable storage might be required. AGM batteries are a good choice for low maintenance and safe installation in a house. Lithium Ion batteries offer optimum performance and space savings.

Rolls AGM Batteries
Lithium Ion Batteries

SMA Logo SMA Smart Home Flexible with Sunny Boy and Sunny Island Final SMA Flexible Storage Solution

SMA Sunny Island 6.0/8.0H-12

The Sunny Island 6.0H / 8.0H supports a wide range of on-grid and off-grid applications

Powerful inverters with rated power outputs of 6kW or 8kW for 30 min. which can be stacked in clusters for higher power levels in both single phase and three phase networks and support a wide range of on-grid and off-grid applications. Systems up to 300kW are possible.


  • Compatible with many well-known brands of lithium-ion battery and all lead-acid batteries
  • Includes integrated Wi-Fi and Ethernet interfaces
  • Allows set-up using laptop or Smart device (phone or tablet)
  • IP54 protection to allow outdoor installation if required
  • High efficiency (>95%)
  • Low standby & idle consumption (25W/4W)
  • Operating temperature range of -25 to +60 deg C
  • OptiCool system ensures high power in high temperatures by cooling the encapsulated transformer but keeping air ventilation away from coated circuit boards & electronics to ensure high protection for humid or salty atmospheres
  • Includes two free programmable relays per unit to enable load shedding or other use and timers to enable daily, weekly, or monthly functions
  • up to 3 units can be stacked in a single phase cluster
  • up to 36 inverters can be used in a Multicluster system when combined with MultiCluster Boxes
  • Warranty 5 years or 10 years with registration via the information sheet provided

Temperature sensor required for each Master inverter used with lead acid batteries.

SMA Sunny Island 6.0H/8.0H
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Product Code Description Retail Price
(ex VAT)
SI-6.0H-12 Sunny Island Inverter, 4.6kW, 48V, 0-90A charger, WLAN £2,458.43
SI-8.0H-12 Sunny Island Inverter, 6.0kW, 48V, 0-115A charger, WLAN £2,793.51

SMA Sunny Home Manager

The Sunny Home Manager is the ideal solution for simple plant monitoring and intelligent energy management. It provides remote monitoring via the SMA Sunny Portal and an overview of all the energy flows taking place in the household. It displays recommended actions and is able to control loads via SMA radio-controlled sockets automatically. The device learns the typical consumption pattern of the household and combines this information using a weather forecast prediction of the PV generation. As a result, the Sunny Home Manager enables a much higher proportion of generated electricity to be consumed on site and a highly efficient use of energy.

The Sunny Home Manager 2.0 includes an integrated Energy Meter to monitor the properties import/export.

Can be used in conjunction with Mennekes Amtron car charging points to provide optimal charging of EV's. Edimax Smart Plug Switches can also be used to monitor and control loads.

Current Transformer clamps can be used to simplify installation and are required for systems where the main AC supply exceeds 63A per phase.

SMA Sunny Home Manager
SMA Sunny Home Manager 2.0
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Product Code Description Retail Price
(ex VAT)
HM-20 Sunny Home Manager 2.0 inc power measurement 1/3ph Ethernet £541.77
HM-METERADAPTER Sunny Home manager 1.0 adapter for meter optical interface £30.00

SMA Energy Meter

The SMA Energy Meter is a fast bidirectional single or three phase meter used to measure power going in/out of the grid. It communicates these values quickly via Speedwire using standard Ethernet cable to the Sunny Home Manager, or to the Sunny Boy Smart Energy.This, in turn, facilitates optimal energy monitoring, effective load and battery management and reliable active power limitation at the grid feed-in point while taking self-consumption into account.

  • 63A rating - use with external current transformers for higher currents (see related products)
  • Warranty: 2 years
SMA Energy Meter
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Product Code Description Retail Price
(ex VAT)
HM-EMETER-20 SMA Energy Meter version 2 £309.43

Edimax Smart Plug Switch with Power Meter

The Edimax Smart Plug Switch with Power Meter enables intelligent control of electronic devices, the embedded power meter allows you to monitor and manage power usage.

  • Switch on & off via iPhone, iPad & Android
  • Monitor & manage your power
  • Automated power usage reports & email alerts
  • Automatic budget control feature
  • Real time power data and history with daily, weekly & monthly stats
  • Wireless installation with a smartphone or tablet
  • No additional hardware required
  • Built-in Wifi
  • Compatible with the SMA Sunny Home Manager for solar export control and monitoring in Sunny Portal
Edmiax Smart Plug Switch With Power Meter SP-2101W UK Edmiax Smart Plug Switch Load Graphic
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Product Code Description Retail Price
(ex VAT)
EDISP-2101W Edimax WLAN radio-controlled socket & meter £40.78

Anti-Islanding Boxes

These anti-islanding boxes come complete and pre-wired for easy  installation. The anti-islanding device consists of a Ziehl anti-islanding relay (model UFR1001E or model SPI1021), the required circuit breakers and a 63A contactor.

Some inverters are not certified to connect to the UK grid, these anti-islanding boxes can enable them to be connected. No interface with the inverter is required.

AI-B1 | 63A anti-islanding box for single-phase systems, complies with:

  • G98 & G99

AI-B3 | 63A anti-islanding box for three-phase systems, complies with:

  • G98 & G99
  • VDE-AR-N 4105
  • ÖVE/ÖNORM E 8001-4-712
  • DIN V VDE V 0126-1-1/A1 / NOI-RES_13E
  • NRS-097-2-1
Anti-Islanding Box Closed
Anti-Islanding Box Open
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Product Code Description Retail Price
(ex VAT)
AI-B1 Single phase G99 anti-islanding box 63A £743.40
AI-B3 Single & Three phase G99 anti-islanding box 63A £843.36