In a distributed database system, a program often referred to as the database's back end runs constantly on a server, interpreting data files on the server as a standard relational database. Programs on client computers allow users to manipulate that data, using tables, columns, rows, and fields.
A solar energy system big enough to power a computer and a few other small items might cost you about $700 to $1000. These are also well suited for RVs, boats and camping. Learn more about portable solar energy units.
The U.S. Department of Energy (DOE) estimates that a $1/watt installed photovoltaic solar energy system â equivalent to 5â6 cents/kWh â would make solar without additional subsidies competitive with the wholesale rate of electricity, nearly everywhere in the US.his currently adds about $1.48/watt to the cost of an installed system. The $1/watt goal requires a reduction to about $0.44/watt (Table 1).