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 higher cost of installation dramatically raises the cost of solar power. Overall, the cost of solar singles is around $8-10 per Watt installed, compared with $2.50-3 per Watt for traditional solar panels. All photovoltaic power is produced in the form of direct current (DC).