G
GaryM
Could anybody please explain the relevance of panel efficiency in real terms?
e.g.
Sanyo H series 250W panel - 18% efficiency
Sharp 250W - 15.2% efficiency
Mitsubishi 250W - 15.1% efficiency
16 of either of the above panels would give me a 4kW system so where does efficiency come into play?
Also, would one 4kW system be pretty similar to another or could they differ by quite a bit in terms of yield?
I've had a salesman tell me that efficiency is relative to panel output in that a 220W panel could be 15% efficient and if it was 18% efficient then it would be a 250W panel (numbers are examples and probably wont add up) but that can't be right as Sanyo do a 240W panel which is more efficient than the 250W H series panel I listed above.
e.g.
Sanyo H series 250W panel - 18% efficiency
Sharp 250W - 15.2% efficiency
Mitsubishi 250W - 15.1% efficiency
16 of either of the above panels would give me a 4kW system so where does efficiency come into play?
Also, would one 4kW system be pretty similar to another or could they differ by quite a bit in terms of yield?
I've had a salesman tell me that efficiency is relative to panel output in that a 220W panel could be 15% efficient and if it was 18% efficient then it would be a 250W panel (numbers are examples and probably wont add up) but that can't be right as Sanyo do a 240W panel which is more efficient than the 250W H series panel I listed above.
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