Every big roof should have these, page-2

yes they should!

I'm just spitballing so numbers etc will be off but I hope you get the gist of my ramblings. Also I'm not sure but I think BCA has minimum requirements (now) but they are fairly relaxed. The BCA should have more aggressive requirements... to do with energy production and energy loss mitigation (ie super insulating).

All new buildings should be coded for a minimum requirement of say "minimum 1kw per room" for residential. so 1 room = 1 person and a 4 bed house would have a 4kw system as a minimum for residential and then 1 panel per 10 square meters or some other variation for commercial. Commercial and residential owners should be provided incentives to fill their roof space rather than just doing the minimum, the more you do the more you get.

Obviously grid connected inverter restrictions would have to be abided by but storage systems can be added to utilise excess power rather than just dumping as heat (unless you have a water heating system that the pv dumps heat to). If the installed Pv is more than the grid distribution inverter. ie 10kw installed 5kw charges batteries, 5kw get put to grid (assuming demand is zero). Obviously grid inverter requirements change depending on where you are but allowing owners to install more upon request (if network allows) ie allowing multiple grid connections per residential would be great.

Where I am we have 3 phases and 1 inverter (5kw) - I understand that we could get 1 inverter per phase (15kw) depending on the network. Presently we hit 5kw peak and the power output graphs have a flat section thats usually between 11 and 3pm during summer. That excess obviously could dump to a power wall or other device.

All buildings should have batteries installed that are matched to a system but must meet a minimum threshold of something like 1/2 the installed capacity x 24hrs or some other arbitrary amount.

All existing buildings with a lifespan that has at least 25 yrs remaining (depreciation schedules run for 40years) should have panels installed within 5years of legislation being enacted. Todays uptake is purely voluntary but if there are minimum standards that must be met. Similar enforcement to Pool fencing, if you sell house/ property you have to meet requirements etc.

We could be a LOT MORE progressive in uptake of renewables and also in mitigating energy loss by utilising batteries and insulation etc... I would certainly do more inverters and Pv on my roof if allowed.

Lobby your local MP.. but i'll bet you get some tripe about how they enemy party have done nothing rather than what they can actually do for you...