Все зависит от того каким током и сколько банок заряжается. Этот БП слишком слабый 6W для 12 В - это всего 0.5А
У зарядника ограничение 50Вт (но это максималка). Я при заряде полной мощностью ни разу не пользовался.
в этой линейке трансформаторов есть и мощнее.вот и не знаю на сколько ват взять.
В идеале 50Вт + небольшой запас на потери в заряднике (т.к. КПД < 100%)
P.S. от светодиодных лент сам ни разу не пробывал ставить, хотя перед новым годом присматривался к модели на 150Вт.
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