Corindikev
Established Member
- Joined
- Sep 20, 2023
- Messages
- 466
- Reaction score
- 707
- Points
- 193
- Location (town/city + country)
- Gulmarrad, NSW, Australia
- Driving
- MG4 (2022-2025)
If you can work out what your average power usage in kWh is in a 24 hour period in both Summer & Winter conditions get a battery that can provide at least this amount and a hybrid inverter that can supply what you are likely to need from the battery at peak times like cooking dinner, heating etc.
I installed a 10kW inverter, 18.64 kWh battery & 8.8kW of bi-facial panels in November 2025. Without using air conditioning but normal evening usage like lighting, TV, cooking a fridge/freezer, upright freezer & bar fridge etc the battery depletes to around 70-75% overnight. On sunny days it is fully charged again by 10am & then it begins to export to the grid.
The maximum output current from the battery/inverter is 46 amps or 10.6 kW at 230 volts, quite sufficient for our household.
When we have had hot 35 deg plus days the aircon runs all day and most of the night. The battery has depleted to 20% at the most overnight. If the next day is cloudy it takes most of the day to re-charge.
Note we are 29.5 deg South of the Equator & these values are from December to the end of February so Summer. Our Summer days though are not as long as those at higher latitudes.
Winter values will be interesting & after a year I will be able to decide whether I need to add any modules to the battery in order to go off grid which is my goal.
I installed a 10kW inverter, 18.64 kWh battery & 8.8kW of bi-facial panels in November 2025. Without using air conditioning but normal evening usage like lighting, TV, cooking a fridge/freezer, upright freezer & bar fridge etc the battery depletes to around 70-75% overnight. On sunny days it is fully charged again by 10am & then it begins to export to the grid.
The maximum output current from the battery/inverter is 46 amps or 10.6 kW at 230 volts, quite sufficient for our household.
When we have had hot 35 deg plus days the aircon runs all day and most of the night. The battery has depleted to 20% at the most overnight. If the next day is cloudy it takes most of the day to re-charge.
Note we are 29.5 deg South of the Equator & these values are from December to the end of February so Summer. Our Summer days though are not as long as those at higher latitudes.
Winter values will be interesting & after a year I will be able to decide whether I need to add any modules to the battery in order to go off grid which is my goal.
