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||{{attachment:WithBattery.png| |width=300}} ||Installing a battery does not change the energy consumed, the size of the red circle, nor the energy generated, the size of the green circle.<<BR>>What it does change is the level of overlap. It increases self consumption by allowing some of what would otherwise have been exported, to be stored and used when instantaneous generation is less than consumption, e.g. at night.<<BR>>This means that both export and import are reduced by the same amount, equal to the increase in self consumption.<<BR>>Import and export have the same emissions intensity but different prices. Hence a battery saves money but not emissions. || | ||{{attachment:WithBattery.png| |width=300}} ||Installing a battery does not change the energy consumed, i.e.the size of the red circle, nor the energy generated, the size of the green circle.<<BR>>What it does change is the level of overlap. It increases self consumption by allowing some of what would otherwise have been exported, to be stored and used when instantaneous generation is less than consumption, e.g. at night.<<BR>>This means that both export and import are reduced by the same amount, equal to the increase in self consumption.<<BR>>Import and export have the same emissions intensity but different prices. Hence a battery saves money but not emissions. || |
The effect of adding batteries to a solar system
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The red circle represents the total energy consumed over some time interval. |
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Installing a battery does not change the energy consumed, i.e.the size of the red circle, nor the energy generated, the size of the green circle. |
Notes
Adding the battery will actually increase consumption slightly as charging and discharging cause some losses as heat. See here.
- The carbon credits for the saved emissions due to exported energy will be counted by the power company if they were signed over at installation, as is common.