I am trying to work out whether it is worthwhile to pay the extra money to tilt solar panels on my roof.
I am looking at getting 11 x 225wSuntech panels, with German SMA inverter =2.475kw system (grid connected).
Cost of system = $7598 installed after all rebates/RECS etc (and includes $100 for extra 10m cabling/ conduit and $185 for meter isolation links, which they said I needed after coming out to look at my roof/meterbox, and 2 storey house extra safety costs of installation).
Cost of aluminium tilts would be additional cost of $1622 to withstand 240km/hr winds= total system cost $9220
I live in Brisbane(ideal roof pitch apparently 27deg), and have a large almost flat completely unshaded northeast facing roof, tin construction, 50 yrs old, which has 5 deg pitch which the installer measured. (Is an unusual slight inverted V shaped roof with a box gutter, but essentially roof space of that orientation is not an issue)
I use 12.5kwh/day at the moment , with electric hot water and electric stove. I am also going to get solar hot water, so expect my energy use will reduce a bit more.
The sales guy told me that with lattitudes above byron bay, the energy loss by not having tilt is small and would take 16 yrs to cover the cost of the tilts.
Other solar guys I have spoken to have said that the dust can accumulate at that level of tilt and its worth paying for tilt.
My other concern is storms and the system being ripped off the roof (though my suncorp ins. does cover panels)
Also the other additional cost is the electrician thought my meter box may have asbestos and might have an extra cost for energex to fit the meter. Has anyone just bought a new meter box to house the new meter and connect to the old box or a box to house the new meter and the inverter (is very much under cover under verandah).
(my main aim in going solar is the cleaner energy side of things, as hoping to set the house up in a very sustainable way)
Any advice would be very much appreciated.