没有电池, 在德克萨斯州，太阳能电池板可以通过

称为“净计量”或“太阳能回购”的过程将多余的电力送回电网，允许房主在电费账单上获得其产生的额外电力的抵免，并将其送回公用事业公司;本质上是将未使用的太阳能卖回电网。

in Texas, solar panels can send excess electricity back to the power grid through a process called "net metering" or "solar buyback," allowing homeowners to receive credits on their electricity bill for the extra power they produce and send back to their utility company; essentially selling their unused solar energy back to the grid. 

We saved at least half e bill, we paid over $400 before, reduced to $180 now.