Inverters
Inverters
BrandSMA
SMA Sunny Island Multicluster Grid Connect Boxes
£ 5,096.8GBP · price may vary
BrandSMA- Model
- SI-GRID-BOX-1.3-20
- Specifications
- 1
- Weight (kg)103
Overview
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.
Specifications
| Weight (kg) | 103 |
|---|
Reading the specifications
SMA Sunny Island Multicluster Grid Connect Boxes is listed with 1 published specification from SMA, including weight (kg) of 103. Those figures are what decide whether this unit fits your system, so read them against the equipment it will connect to before comparing price.
For an inverter, the figures that matter most are continuous AC output in kW, which caps the load you can run at once, surge or peak rating, which covers the brief inrush of motors and compressors, maximum PV input and the number of MPPT trackers, which set how many panel strings you can connect and the MPPT voltage window, which decides how many panels go in a string. It is the component that decides what a solar system can do: how much power you can draw at once, whether you can export to the grid, whether the system keeps running in a blackout, and how well the panels and battery are managed day to day.
What to check before ordering
The checks below apply to any inverter. Run them against the specification table above — most disappointing solar purchases are compatible-on-paper units that fail one of these in practice.
- Look at the warranty term and what it covers. Five years is the common baseline, ten is offered by stronger brands, and extensions are often cheaper bought with the unit than later.
- Size the inverter against the loads you need to run simultaneously, not against the total wattage of every appliance in the building — a 5 kW inverter comfortably runs a fridge, fans, lights and a couple of ACs, but not all of them plus a water pump starting at the same time.
- Keep the panel array between roughly 1.0 and 1.3 times the inverter's rating. Slight oversizing (a higher DC-to-AC ratio) captures more energy on cloudy mornings and winter days; going far beyond it wastes generation through clipping.
- Check the surge rating if you run motors — deep-well pumps, compressors and older air conditioners can draw two to three times their running current for a few seconds at start-up.
Common mistakes
- Assuming any grid-tie inverter keeps the lights on during an outage. Standard on-grid units shut down for safety unless they have a dedicated backup or islanding output.
- Overlooking the IP rating. An outdoor installation needs at least IP65; indoor-rated units mounted outside fail early.
- Buying on peak-watt price alone. A cheap inverter with a narrow MPPT window forces awkward string layouts and can strand a portion of the array.
Price and availability
SMA Sunny Island Multicluster Grid Connect Boxes is listed at £ 5,097 (GBP). Solar pricing moves with supply, import duties and exchange rates, and distributors set their own margins, so treat this as a comparison reference and confirm the current figure before you order.
SolarBazaar compares equipment rather than selling it. Shortlist here on specification and price, then buy from an authorised distributor or installer in your country: warranty cover on solar hardware is normally honoured through the channel you bought from, so confirm who supports SMA locally before ordering.
SMA Sunny Island Multicluster Grid Connect Boxes — frequently asked questions
How much does SMA Sunny Island Multicluster Grid Connect Boxes cost?
SMA Sunny Island Multicluster Grid Connect Boxes is listed at £ 5,097 (GBP). The figure is indicative — solar prices move with supply, duties and exchange rates, and each distributor sets its own margin — so confirm the current price with a supplier before ordering.
What are the specifications of SMA Sunny Island Multicluster Grid Connect Boxes?
We hold 1 published specification for this inverter, including weight (kg) 103. The full table is on this page, listed under model SI-GRID-BOX-1.3-20.
Who makes SMA Sunny Island Multicluster Grid Connect Boxes?
SMA Sunny Island Multicluster Grid Connect Boxes is a SMA product, listed under inverters with model reference SI-GRID-BOX-1.3-20. The SMA brand page lists the rest of its range so you can compare across the catalogue.
Is SMA Sunny Island Multicluster Grid Connect Boxes right for my system?
That depends on what it has to connect to. For an inverter, check maximum PV input and the number of MPPT trackers, which set how many panel strings you can connect, the MPPT voltage window, which decides how many panels go in a string and peak and weighted (European/CEC) efficiency, typically 96–98.5% against the rest of your equipment before price enters the decision. Size the inverter against the loads you need to run simultaneously, not against the total wattage of every appliance in the building — a 5 kW inverter comfortably runs a fridge, fans, lights and a couple of ACs, but not all of them plus a water pump starting at the same time.
Where can I buy SMA Sunny Island Multicluster Grid Connect Boxes?
SolarBazaar lists and compares equipment rather than selling it. Use the specifications and price here to shortlist, then buy through an authorised distributor or installer — buying in-channel is what keeps the manufacturer's warranty valid.
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