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In page Photovoltaic system:
"
- Systems such as Net Metering and Feed-in Tariff which are offered by some system operators, can offset a customer's electricity usage costs. In some locations though, grid technologies cannot cope with distributed generation feeding into the grid, so the export of surplus electricity is not possible and that surplus is earthed.[citation needed]
- Grid-connected PV systems are comparatively easier to install as they do not require a battery system.[1][2]
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