When it comes to installing a solar power plant, homeowners and businesses face a choice: install a smaller tracker-mounted system that “follows” the sun, or increase the capacity of a fixed system by adding more panels.
At first glance, it seems that more panels should produce more electricity. But in practice, 10 kW on a tracker is more efficient.
Let’s look in detail at why this is the case.
How a tracker works and why it increases generation
A tracker is a structure that rotates the panels with the sun throughout the day. This keeps the incidence angle optimal, and the system produces 30–40% more electricity from the same capacity.
10 kW on a tracker provides roughly the output of ~14 kW of fixed panels and offers additional advantages.
Lower connection costs
Increasing installed capacity means a more expensive grid connection and the risk of limits from the local utility. A tracker delivers the same kWh without ramping up capacity.
Cheaper inverter and equipment
More panels = a larger inverter. With a tracker, a smaller-capacity—and therefore cheaper—set of equipment is sufficient.
More uniform generation throughout the day
Unlike fixed systems that peak at noon, trackers provide steady output from morning to evening. This better matches real consumption in a home or business.
Simpler installation and fewer panels
Less equipment means lower costs for installation, cabling, and structures.
Smaller footprint
A tracker yields more energy per square meter, which is relevant if your site is limited.
Faster permitting
The lower the installed capacity, the simpler the approvals.
Efficiency even in winter
A tracker automatically catches the low winter sun, whereas fixed panels perform poorer at that time.
Lower losses at generation peaks
The system doesn’t overload the inverter during sunny midday hours.
Lower panel temperature
On a tracker, the panels cool better, which means they operate more efficiently and last longer.
Flexibility for expansion
A tracker system is easier to scale in the future.