If the system is sealed then you only need create vacuum in the bottle. So it does not really matter if you have electric one or not. You can filter bigger batches with just regular hand pump. If you are going to do really big batches get a Peristaltic Pump and a Whatman Polycap type of filter. Just make sure to get filter that tolerates the chemicals you are going to use since these filters are a bit expensive.
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And to answer your question, no dont get an electric one. Stick to the hand vacuum pump