Net zero-energy PV or PV sized for the A/C load?
A rather big picture question –
Net Zero Energy building standard is ramping up in Canada. It is obvious to many however the target should instead be Net Zero Carbon with the inclusion of a Life Cycle Analysis of the building.
Anyway, the Net Zero Energy standard includes a PV array to generate as much electricity annually as the house consumes in energy (of all fuel types). In Canada the vast majority of the solar electricity is generated over six sunny months. This might have implications or a poor match for some electricity grids that use the most electricity in winter.
How does the size of the NZ PV system coincide with the needs of the local utility, their grid and the seasonal demands? Is the NZ PV sized array more arbitrary than practical?
Would it be a better idea to size a PV to meet the a/c demand or load of the house? Seems practical for summer a/c peaking grids. The PV would be two to three times smaller and cheaper. The PV could displace the gas-fired peaking power and therefore significant GHGs. I am thinking of local optimization compared to a crude blanket applied approach nation wide (does that sound familiar right now??)
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