If someone in your household works from home, solar tends to deliver more value, because your electricity use shifts into the daylight hours when the panels are producing. Every kilowatt-hour you use straight from the roof avoids buying one from the grid at the full retail rate, commonly 30-45 c/kWh in NSW, instead of exporting it for a feed-in tariff of a few cents. That shift changes how you should size a system, how much you need a battery and when you run your biggest loads.

Why daytime use changes the economics

Self-consumption is the share of your solar generation used in the home rather than exported. A household that is out from breakfast until dinner uses little of its midday solar, so more of the value depends on low feed-in tariffs. A work-from-home household runs computers, lighting, the kettle and often heating or cooling right through the day.

The gain varies with how many days a week you are home, the season and your heating and cooling, so treat it as a direction rather than a fixed figure.

What a home office actually uses

Office equipment itself is modest. The bigger daytime loads are usually climate control and the kitchen. As typical ranges:

• Laptop: tens of watts while in use.
• Desktop computer with monitors: roughly 100-300 W, depending on the machine and screens.
• Modem, router and chargers: small but continuous.
• Reverse-cycle split system: from a few hundred watts to around 2 kW while running, depending on size, efficiency and weather.
• Kettle, microwave and cooktop at lunch: short bursts of 1-2 kW or more.
• Portable fan heater: commonly around 2 kW, and far less efficient than a reverse-cycle system.

A 6.6 kW system in Sydney typically produces roughly 24-27 kWh a day on average, with several kilowatts available around midday on a clear day. That comfortably covers office equipment and a split system for much of the year. Winter is the tighter season, with lower output and higher heating demand.

Sizing for a work-from-home household

Start with your interval data or recent bills rather than a generic size. Look at weekday daytime usage, then consider how it may change over the next few years:

1. Size to the daytime load you can use, plus a sensible margin. Because you consume more during the day, a larger system is more likely to pay its way than in an empty house, but exports beyond your use still earn only a low feed-in rate.
2. Consider orientation. A home office in use from early morning to late afternoon can benefit from some east or west-facing panels that stretch production across the working day.
3. Check export limits and supply type. A larger array may reach your network's export limit, which matters less when you use more of the power yourself.
4. Plan for change. A return to the office, an EV or a switch to a heat pump will reshape your usage profile.

The system sizing guide compares common system sizes, and the guide to how many panels you need walks through the calculation.

Do you still need a battery?

For many work-from-home households, a battery is less urgent than for homes that sit empty all day, because more of the solar is already used directly. A battery earns its value by moving surplus solar into the evening, so its usefulness depends on how much surplus is left after your workday and how much you use after dark.

A battery becomes more attractive if you still export a lot at midday, have a high evening load, or are on a time-of-use plan with an expensive evening peak. Remember that backup is not automatic: it requires suitable inverter capability and wiring, and it covers only the circuits designed for it. If keeping a computer and internet connection running through a short outage is your main concern, a small uninterruptible power supply at the desk may be the simplest answer. If you want to keep the battery option open, a hybrid inverter makes adding one later simpler, as the hybrid vs string comparison explains.

Getting more from solar during the workday

• Run heavy appliances in solar hours. Use the dishwasher, washing machine and dryer between late morning and mid-afternoon.
• Pre-cool or pre-heat. On hot days, start the air-conditioner in the early afternoon while solar is strong, rather than at full effort in the evening.
• Heat water with solar. Schedule electric or heat pump hot water for the middle of the day.
• Replace inefficient heaters. A reverse-cycle system uses much less energy than resistive heaters for the same warmth.
• Watch the data. Consumption monitoring shows what your office and climate control really use.

The market on this site lists an Energy Monitoring Dashboard from $590 (indicative, confirmed after a site assessment), which shows import, export and self-consumption, and Efficient Air-Conditioning from $2,990 (indicative, confirmed after a site assessment) for replacing an older unit.

A note for home businesses

If you run a registered business from home, ask your accountant how a solar purchase is treated in your circumstances; this guide does not give tax advice. If clients visit or equipment runs for long hours, your daytime load may be higher than a typical work-from-home household, which strengthens the case for sizing panels to that load. Either way, keep the quote, invoice and usage records together.

Next steps

Gather a few weekday bills or your interval data, note when you actually use power, and ask installers to size the system to that pattern rather than to a generic household. For a recommendation based on your roof and working routine, you can request a free assessment from Blue Energy Solar, and see monitoring, air-conditioning and solar packages in the market.

Frequently asked questions

Does working from home part-time still make solar worthwhile?

Usually it helps. Even two or three days at home moves a meaningful share of weekday usage into solar hours, and weekends often add daytime use as well. Solar can also suit households that are out all week, particularly with a battery or scheduled appliances. When assessing the numbers, use your actual usage across a typical week rather than a best-case day at home.

Does a home office need a switchboard upgrade before solar?

Not usually because of the office itself, since computers and chargers draw little power. A switchboard upgrade is more often needed because the board is old, lacks space for solar protection devices or still has outdated fuses. If you are also adding air-conditioning, an EV charger or a heat pump, ask the installer to check capacity for all of them at once so the work is planned together.

Is a time-of-use tariff better for a work-from-home household with solar?

It depends on when you draw power from the grid. Time-of-use plans usually charge more in a late afternoon and evening peak and less at other times. If solar covers most of your workday usage and you can limit evening consumption, a time-of-use plan may suit you. If evening usage is high and you have no battery, a flat rate can work out better, so compare offers using your own data.