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American Solar Energy Society

USA: High Subsidy Level and Slow Motion in California

Submitted by Baerbel Epp on July 1, 2011

 Installation in California” Demand for subsidised solar water heater is very different in Europe and the USA. A comparison between California and the Czech Republic shows that the growth potential is much higher in European countries. The number of applications submitted to the national subsidy programme has been 100 times as much in the Eastern European country as in the US state. The photo shows a commercial solar water heater on a multi-family apartment community in Huntington Beach, California, installed by California Solar Thermal, Inc. The 24-panel-installation was subsidised by both California Solar Initiative (CSI) - Thermal Program as well as the Federal Treasury Grant (30%) and reached a payback time of two years.
Photo: California Solar Thermal

Field Monitoring of Solar Domestic Hot Water Systems Based on Simple Tank Temperature (1995)

Submitted by Hans Craen on November 5, 2009

This report was a joint effort from the National Renewable Energy Laboratory, Sacramento Municipal Utility District, prepared for the American Solar Energy Society at the Solar 1995 Conference. This report has equations to use to calculate solar loop gain and tank losses. Analysis is based upon the tank energy balance – identifying solar gain during the day and tank losses at night. These gains and losses can be compared to expectations based upon prior knowledge and estimated weather conditions.

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