Hi All,
My first post here, hopefully its in the right spot!
I am planning a stand-alone rural domestic solar system near Sydney Australia (240 AC). I want to set it up with minimal battery supply, enough to get me through one night only. I calculate the nightly energy usage at 2kWh.
I dont want this energy raided through the day by daylight appliances on a dull winters day, so I plan to have basically 2 separate switchable supply ccts for the house one battery powered (night), and the other, daylight, running off an AC bus drawing power from PV panels via an inverter, with NO battery backup. There will also be a genset for the occasional heavy loads, breakdowns, and battery boosting in lieu of days of autonomy.
My question relates to the daylight cct and its loads, specifically the small aircon we use during summer (presently powered by 6kW genset). I want to power this from the AC bus during the day. My clamp meter tells me it runs at 1100 watts continuous (4.6A at 240VAC). AS 4509.2 suggests a surge factor of 7 for induction motors when they switch on, meaning, as I understand it, a momentary current draw of about 32 amps at 240VAC.
If that surge demand is not met from the panels at startup time because of cloudy weather, etc, or the 4.6A cts is rising and falling above and below that number, what are the consequences for the aircon? Will it get going, but slowly? Will it burn out? Should some cut-out device be installed to protect it?
My first post here, hopefully its in the right spot!
I am planning a stand-alone rural domestic solar system near Sydney Australia (240 AC). I want to set it up with minimal battery supply, enough to get me through one night only. I calculate the nightly energy usage at 2kWh.
I dont want this energy raided through the day by daylight appliances on a dull winters day, so I plan to have basically 2 separate switchable supply ccts for the house one battery powered (night), and the other, daylight, running off an AC bus drawing power from PV panels via an inverter, with NO battery backup. There will also be a genset for the occasional heavy loads, breakdowns, and battery boosting in lieu of days of autonomy.
My question relates to the daylight cct and its loads, specifically the small aircon we use during summer (presently powered by 6kW genset). I want to power this from the AC bus during the day. My clamp meter tells me it runs at 1100 watts continuous (4.6A at 240VAC). AS 4509.2 suggests a surge factor of 7 for induction motors when they switch on, meaning, as I understand it, a momentary current draw of about 32 amps at 240VAC.
If that surge demand is not met from the panels at startup time because of cloudy weather, etc, or the 4.6A cts is rising and falling above and below that number, what are the consequences for the aircon? Will it get going, but slowly? Will it burn out? Should some cut-out device be installed to protect it?