I've learned a lot about batteries and electrical systems. I do have a question regarding battery disconnects? Is there such a product that can disconnect a battery automatically at a specific voltage or SOC? I'm looking at LIFEPO4 lithium battery and want to cut off the battery at 80%, but I'm not sure how I could go about doing that? It would be for both 12v loads and to the inverter. Sorry if this is a newbie question.