I've just had 3 quotes for solar.
All 3 quote for the same thing except the panels. The 3 brands being offered are Trina, Canadian Solar and LG.
The quotes are within about $500 of each other.
Any opinions about the actual panels?
I can quote model numbers if interested.
Ideally you want the fewest panels (aka highest watts per panel of similar dimensions).
One aspect worthwhile specifying (& finding out exactly what higher rating/gauge wiring they propose to use) - the wire. The thicker the wiring, the lower the resistence = lower power loss (can be up to a few % at worst). Equally the fewer panels = less run of wiring = less power losses.
When we did ours in 2013 I got double the diameter wiring (cost $15 extra!) & also checked the path they proposed to run it to ensure least distance. Cut around 5m off the run.
Overall result, now 7+ years on we're still generating more than we should according to the site specific calculators available & also according to the panel manufacturer. Our avg annual daily is now around 2% what was projected for when first installed.
The more you try to optimise each component of installation then the better the outcome received. After all whats an extra $15 for 2-3% extra generation - for example.
Also - is your inverter going to be shaded - partially or fully while still having good space (airflow) on 5 sides? Every little bit adds up.
Need to do your own due diligence on the panels - check the Australia testing facility results for example. Hopefully those panels have been installed there.