SMA Sunny Island Off Grid Inverters

Designed for rough ambient conditions for stand alone or grid back up operation. Rated to give a power output of 4.4kW for 30 min.

• 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.

In single-phase systems only one SI4.4M-13 can be used. Three-phase systems can be achieved using a cluster of three SI4.4M-13 inverters, multi-cluster systems are not possible with these inverters.

For larger single-phase or multi-cluster 3-phase systems please see the Sunny Island 6.0H/8.0H below.

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.

Features:

• 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.

Used with the Master inverter of each cluster with lead acid batteries to ensure correct battery charging.

Install large off-grid systems with minimum effort. The Multicluster-Boxes for the Sunny Island inverters are the ideal solution for the easy installation of island and hybrid systems from 30 up to 300 kW. They include integrated generator and load shedding contactors for AC distribution. For an example of Multi-cluster boxes in use see Isle of Eigg project.

Used in conjunction with the Sunny Island Multicluster box SI-MC-BOX-12.3.20 to enable use in connection with the grid for self-consumption or battery back-up systems.

The SI-GRID-BOX-12.3-20 can be used with PV systems up to 138kWp.

Allows disconnection of loads in event of low battery state of charge. Controlled by signal from programmeable relays inside the Sunny Island inverter.

Suitable enclosure for the SMA Sunny Island Load Shedding Contactor SI-LS100-48.

• Empty enclosure with DIN rail
• Base and cover: polystyrene, grey, similar to RAL 7035
• IP66
• Protection class II
• 1000V DC rated
• 690V AC rated

Used to measure DC current when there are loads or charge sources directly connected to the battery. Allows the Sunny Island inverters to include these in it's state of charge calculations and ensure accurate battery charging.

Central connection units used to simplify off-grid installations with Sunny Island inverters. Provides everything needed in an IP54 GRP wall mounting enclosure with all cable glands to enable a straightforward and tidy installation.

Versions for

a) single phase systems using one Sunny Island or

b) three phase systems using one cluster of 3 Sunny Islands and connnections to suit either: up to 6 x SB-5000TL-21 (two per phase); or up to 2 x STP-12000TL-20; or up to 2 x STP-20000TL-30.

Includes:

• Connection for Sunny Island inverters, Generator, PV Inverter and Loads
• Class 11 overvoltage protection for generator, PV & loads
• 63A load shedding contactor
• DC/DC converter to supply cluster controller & load shedding contactor
• Rotary Bypass switch - four positions: Off; Normal; Without Diesel & Diesel Only
• All required RCD's, fuses and circuit breakers

Not Included: 
SMA Data Manager (SMA-EDMM-10) and Ethernet switch

Dimensions: 500x800x230mm (WxHxD)

Note: To meet the requirements of BS7671 these should be installed in an additional metal enclosure.

Double pole circuit breakers. These protect the DC cables between batteries and inverters against overcurrent and short-circuit and allow easy isolation for installation or maintenance of the inverters.

Rated for maximum charge/discharge voltage of 75V DC and max. short-circuit current may of 10kA.

Versions for use either with one inverter or clusters of three.

VT (voltage tap) version includes two pole 8A fuses for connection of other equipment.

These are load control devices for off-grid power systems with renewable generation and generation sets or inverters which produce a variable frequency supply.

Used to switch on additional loads to take advantage of surplus renewable generation which cannot be stored. They respond to a rise in the system frequency caused by battery inverters signalling a high state of battery charge, or by low load on a generator with frequency droop.

Each switch will control one appliance and is wired into the cable supplying the appliance. They require no user intervention and will automatically switch the appliance on when the system frequency is high and switch it off when the frequency is low. The frequency setpoint can be adjusted during installation.

They incorporate a number of features to ensure stable operation of an islanded power system:

• Once the frequency goes above the switch-on setting there is a delay before the appliance is connected; the higher the frequency is above the setting, the shorter the delay.
• The switch-off setting is a lower frequency than the switch-on setting to ensure stability.
• Once the frequency goes below the switch-off setting there is a delay before the appliance is disconnected; the lower the frequency is beneath the setting, the shorter the delay.

Can control loads up to 13A (3kW at 230V; 1.5kW at 120V). The most appropriate loads are heaters (water heaters, storage heaters, space heaters). Appliances with pumps are not appropriate due to the potential for rapid switching of loads.

The FCS-F1-B version is faster acting with closer frequency settings to provide more certainty of the total load that will be applied at a given system frequency for larger power systems with multiple switches. Usually only used for example, for controlling large wind turbines in off-grid systems (available to special order only).

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

AI-B3 | 63A anti-islanding box for three-phase systems