16 Irvine St / Selections
Prepared for Mastacon · 43 sections
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07b

Solar and batteries

All three dwellings, with extra capacity for the pool at Dwelling 3. Supplied and installed by John's own contractor, Max Power Solar & Electrical (Maximillian Tait); Mastacon to provide for it at rough-in, and to quote as a comparison.

Sizes are our estimates for pricing; the installer's design governs. Hot water stays gas as drawn (WD 11). Sources: SA Power Networks connection rules and Flexible Exports; the federal Cheaper Home Batteries Program.

To confirm or price

  • Roof: the upper roofs (WD 13, 24, 35) are 22.5° Colorbond with the ridge running front to back, so the panels face east and west, about 50 m² a side. We estimate room for roughly 12–15 kW per house. Please confirm the usable area and any structural limits.
  • Who does it: Max Power Solar & Electrical will supply and install the solar and batteries. Would Mastacon also quote the same system (below) so we can compare? And please coordinate access and the rough-in with Max Power.
  • Dwellings 1 and 2: about 10 kW of panels split east/west, a 10 kW hybrid inverter (the SA Power Networks single-phase maximum), and a battery of about 13–15 kWh.
  • Dwelling 3 (pool): please arrange a three-phase supply (the pool heat pump and pump, plus the EV circuit; the pool quote's heat pump draws 4 kW, so please confirm its phase), about 13–15 kW of panels and about 25–30 kWh of battery. The heat pump and filter pump to run on a daytime timer from the solar, so the battery covers the evenings. Mastacon: please arrange the three-phase supply with SA Power Networks as part of the build.
  • Flexible Exports are now required by SA Power Networks on new systems: each inverter needs an internet connection. Please allow data at the inverters.
  • Panel layout (plan above): one row of panels each side of the ridge, the near-flat front roof and the rear hip left clear so nothing sits flat in view from the street. Max Power to confirm the layout, wind-zone fixings and roof-edge clearances.
  • Battery position (plan above): switchboard, inverter and battery together on the garage wall beside the door to the hall, close to the meter box. Out of the sun and weather, not in a habitable room or on an escape route. Please confirm the wall suits (AS/NZS 5139 clearances, any fire-rated lining against the habitable side) and allow blocking, power and data there.
  • At rough-in: conduit from the roof to the switchboard in the garage, switchboard space for the solar and batteries, and the EV circuit already asked for in section 11c.
  • Timing: the federal battery rebate is $251.60 per usable kWh until 31 December 2026, then drops (STC factor 6.8 to 5.7 on 1 January 2027, and further later). The builds won't be finished by then: is there any way to have the batteries installed and commissioned earlier, or does the rebate simply apply at the rate on the day they're installed?
  • Pool cover: included in the pool build. We want it hidden, with no roller on show at the end of the pool. The pool quote has exactly that: an underground pool blanket in a box at one end, wound in with a battery-operated rewind stick (not motorised). The shell is built, so the box is too: please confirm which end it is at, and that its lid will be finished in John's coping.
Plan · indicativePanels, from above (north at the top): one row each side of the ridge, facing east and west. About 10.6 kW (24 panels) on Dwellings 1 and 2, about 14 kW (32 panels) on Dwelling 3. The near-flat front roof and the rear hip left clear
Plan · indicativeBatteries, in the garage on the wall beside the door to the hall, with the inverter and switchboard, near the meter box: one battery in Dwellings 1 and 2, two in Dwelling 3. About 1 m still clear past a parked SUV