Solar World currently offers 4 basic types of systems:
- SW 220/225/230/235 Polycrystalline Panels
- SW 225/230/235/240 Monocrystalline Panels
- SW 220/225/230/235 Monocrystalline Black Panels
- SW 145/150/155 Compact Monocrystalline Black Panels
All the products are MCS registered.
Mono versus Poly:
- Monocrystalline Silicon: made from a single crystal of silicon and is the most efficient type of PV cell.
- Polycrystalline Silicon: cheaper to produce then Monocrystalline cells but are slightly less efficient.
220/225/230/235 What?
These are the Panel power sizes and obviously, a more powerful panel (235W) will cost more than a less powerful panel (145W). Most pricing of panels can actually be broken down to “pounds per Watt”. A general rule of thumb is that the RRP of a panel will cost around £5 per Watt for the less powerful panels, with the cost per Watt gradually reducing as you move up to more powerful systems, until you reach a price per Watt of around £4 for the 240 systems. Also, The Polycrystalline systems will cost more per Watt due to their higher efficiency performances.
The power of the panel is just the first factor. You then need to calculate how many panels you are able to have/need in any array. Let’s assume that you have the space to have a 10 panel array and chose a 235W panel. Thus, the total maximum output of the system will be 235W * 10, or 2350kW.
Next you will want to know how much electricity you will get from that. This is a very difficult calculation to make, as there are so many varying factors such as where you are in the country, how much shade there is around you, which way your roof points etc. For a house with a South facing roof, no shading issues, and based in the South of the UK, a rough estimate is that the system will produce between 80-90% of its maximum power output. Therefore, given our above 2350kW panel array, you can expect (assuming 85% efficiency) around 1997.5 kWh of electricity. However, if considering one of these systems for your house please get in touch with us for an accurate quote.
Why SolarWorld Systems?
The Solar World systems have several advantages:
- They are hard wearing and can withstand heavy snowfall
- They are self cleaning
- They have higher performance ratios
- They provide the best cost/performance ratios
- They look good! (well, if you are going to have these things on your roof you may as well have ones that are good to look at!)
