I am looking to build a battery storage system to take avantage of cheaper electricity at night. I also want the ability to add solar later. Idealy I would like to begin with a simple system that charges at night and runs off batteries during the daytime. I have not purchased anything yet but I am looking at SOK 48v server batteries and a Multiplus 2 complete system with Cerbo GX for monitoring etc. I have spoken to a few installers and they all try to push me to their preferred solutions that always seem to put me into a system that someone else is controlling. My question is, am I on the right track? Is what I want possible and is my proposed choice of equipment the right way to go? I am a newbie so any help would be appreciated here, thanks.