I have exercised my 10 day cooling off period and canceled the contract with Blue Sky Solar Energy and I am now looking at the following options on a tile roof in Brisbane @ 20 degree slope WEST facing 270 degrees (only choice sadly with around 12 % loss)

Any further feedback would be appreciated. You guys are awesome with your knowledge and I really appreciate what you have given me. I do not feel deterred by the western orientation as it certainly appears to out-perform the eastern here in Brisbane.

Option 1 4.2 Kw $21485.00 Australian Natural Energy (RECs X 5)

20 X Sanyo HIT. 210W Mono-Crystalline Silicon Solar Panel, DC output, high efficiency cell

of 18.9% and module of 16.7%. Dimensions 1580mm x 798mm x 35mm, Weight

15.5kg, 25 year power output warranty.

SMA 4000W Transformer Less Inverter with LCD display, 4200W maximum DC input,

240V output, 97.0% efficiency, Dimensions W-470 x H-445 x D-180, 5 year warranty.

Option 2 4.18 Kw $13950.00 Australian Natural Energy (RECs X 5)

22 X Suntech 190W Mono-Crystalline Silicon Solar Panel, 24V DC output, high efficiency

14.1%, Dimensions 1580mm x 808mm x 35mm, Weight 15.5kg, 25 year power output

warranty.

SMA 4000W Transformer Less Inverter with LCD display, 4200W maximum DC input,

240V output, 97.0% efficiency, Dimensions W-470 x H-445 x D-180, 5 year warranty.

Option 3 4.7 KW $17799.00 Energy Matters (RECs X 4) Installation after 30 June 2011

20 X REC Solar REC235PE-BLK Sanyo HIT panels (18.5% cell efficiency)

SMA SB5000TL-20

Option 4 4.23 KW $14599.00 Energy Matters (RECs X 4) Installation after 30 June 2011

18 X REC Solar REC235PE-BLK Sanyo HIT panels (18.5% cell efficiency)

SMA SB4000TL-20

Option 5 4.23 Kw $14999.00 Blue Sky Energy (RECs x 5)

18 X Solarig Stream 235 Kw 17.5% cell efficiency

Diehl AKO 4600 S