The design of solar off-grid systems is actually not complicated. But in daily life, it is found that many people are afraid of off-grid systems, want to do off-grid projects, but do not know how to start, often in a dilemma.

This article hopes to let everyone know how to successfully build a solar off-grid power station through simple and plain language.

From a long-term summary, the off-grid system is mainly based on the following starting points:

(1) Places where there is no way to use mains electricity (grid), such as mountains, boats, cars, and the wild. This is the most typical off-grid system requirement; more than 80% of users want to achieve power supply through off-grid systems because it is inconvenient to use mains electricity.

(2) Areas where there is mains electricity, but irregular power outages often occur. When there is a power outage, the solar off-grid system can continue to supply the load to meet the continuous power demand.

(3) There is mains electricity, but it is hoped to reduce electricity bills through off-grid systems. The off-grid system can not only charge the battery through solar modules, but also charge the battery by setting the utility power when the rate is low, and then supply the load by discharging the battery when the rate is high.

2. Typical off-grid system composition

(1) Off-grid system means that the system output does not need to be connected to the mains grid like a grid-connected solar system. The output of an off-grid system is what supplies the load.

(2) The off-grid system provides the V-F source, which is equivalent to the role of a power grid.

(3) The main equipment in the off-grid system are: solar modules, off-grid inverters, battery packs, confluence devices, distribution boxes, and electrical loads.

(4) The most streamlined off-grid system can only contain two parts: off-grid inverter and battery pack.