The reason everybody loves to run negative energy balance is that you can have a huge debt that way but still have all the cash handy that didn’t get used to pay it. In other words, you can have both a lot of cash and a lot of debt by not paying your electricity bills. It’s a risky proposition, and can be suicide if the energy really spikes forver (which will be the case in a two player game if one of them don’t do anything about it), but I remember some players were really, really good at surfing the debt wave. Personally, winning with a lot of debt felt always that little extra special. May the AI feels it too.