So if you have a solar power system, even just two panels, you will not want to accidentally export power and not get paid for it. This is where a plug in battery system becomes useful. You can set it to charge and discharge at various times of the day but it is unaware of whether you are exporting energy because you have too much or importing energy because you are generating too little. This is where a smart meter comes in. It will monitor the power you take from the national grid and the power you export to the national grid. Why is this meter smart? well if you start to export it will stop it and instead use this excess power to charge your battery. If you start to use power from the grid Smart Meter will tell your battery and it will discharge to try and make up the difference. This video explains the system and how you can do a DIY install without even opening your consumer unit. Links for all parts needed are provided below.
https://www.screwfix.com/p/wylex-nh-ese2-ip40-2-module-unpopulated-din-enclosure/32311
https://uk.ecoflow.com/products/ecoflow-shelly-smart-meter?variant=51466726801747
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