@electronic{www.eb-systeme.de,
   title       = {SMA Energy Meter » smart charging + smart home + smart ev}, 
   url         = {http://www.eb-systeme.de/?page_id=1240},
   biburl      = {https://puma.uni-kassel.de/url/6ab7ade934c1defd5fe946d4012f598a/hotho},
   keywords    = {energy meter protokoll sma},
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@electronic{www.eb-systeme.de,
   title       = {Installation » smart charging + smart home + smart ev}, 
   url         = {http://www.eb-systeme.de/?page_id=1265},
   biburl      = {https://puma.uni-kassel.de/url/e146773d1e1f6e08405c0b0eade84a2d/hotho},
   keywords    = {anlage laden pv sma},
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