Grid-Tied vs. Off-Grid: Which System Do You Need?

Not all solar systems are the same. Depending on your access to the electricity grid and your need for backup, you might choose one of three main configurations.

1. Grid-Tied Systems: The most common and cost-effective type. These connect directly to the utility grid without batteries. The grid acts as “virtual storage”—you export excess power during the day and import power at night.
Pros: Lowest cost, high efficiency.
Cons: No power during grid outages (due to safety regulations).

2. Off-Grid Systems: Used in remote areas where the grid is absent. These rely entirely on battery banks to store energy for night-time use.
Pros: Complete energy independence.
Cons: High cost due to batteries; finite energy capacity.

Table 1.1 Comparison:

Choosing the right architecture is the first step in any solar project design.