For instance, you could kiss your kids on their heads rather than their cheeks for a few days. You could ask your spouse to do bedtime stories and baths for a few nights. But obviously, you canât be so careful in your efforts to prevent germs from spreading that you feel like youâre shunning your kids.
If you grow short plants, you should definitely try LEDs. 1  The first series of costs on the chart represents an electricity cost of $0.12/kwH, or 12 cents per kilowatt hour (a kilowatt hour is 1,000 watts being used for one hour). 2  $0.12/kwH was the US national average cost for electricity in 2011.
Generally, Solar PV systems that generate electricity from sunlight cost between $2.50 to $7 per installed watt. Typically, the larger the system, the lower price per watt.Large commercial systems are typically well below $4 per watt.Residential systems, because of their smaller size are usually somewhat higher. For example, in Ohio a 5 kW residential system with an average monthly production of about 530 kWh would cost approximately $19,000 or about $3.77 per watt.Larger systems have a significantly lower cost per watt.esidential systems, because of their smaller size are usually somewhat higher. For example, in Ohio a 5 kW residential system with an average monthly production of about 530 kWh would cost approximately $19,000 or about $3.77 per watt. Larger systems have a significantly lower cost per watt.