As solar energy projects reach their final stages, one critical step remains before your system can officially go live: the solar witness test. At Lakeland Engineering Equipment Company, we support solar contractors and utilities by offering rental access to high-performance Dranetz meters—the trusted tools for power quality and energy monitoring during these essential tests.
What is a Solar Witness Test?
A solar witness test is the final inspection conducted by your utility company to confirm that your solar energy system is functioning safely and in line with design specifications. It serves as a comprehensive check of both the electrical and physical setup, verifying that your system is ready to connect to the grid.
The witness test plays a key role in:
- Ensuring proper installation of all components
- Testing operational effectiveness under typical electrical loads
- Confirming compatibility and safety with utility equipment
- Providing final visual inspection to ensure compliance with approved plans
Upon successful completion, the utility grants Permission to Operate (PTO), officially allowing your system to begin generating clean, renewable energy.

How Is a Solar Array Tested?
During the test, a utility engineer will typically use advanced power quality analyzers like Dranetz meters to measure the system’s electrical performance. These devices are used to:
- Monitor voltage and current characteristics
- Identify harmonics and transients
- Confirm safe interconnection with the grid
The process usually takes 30 minutes or less and rarely disrupts service.
Rent Dranetz Meters from Lakeland
To help ensure a successful and smooth witness test, Lakeland Engineering offers Dranetz meters for rent. Whether you’re a solar installer preparing for final commissioning or a utility company conducting the test, our rental equipment provides:
- High-accuracy measurements
- Fast availability and expert support
- Cost-effective short-term solutions
Renting the right test equipment can make all the difference in passing your solar witness test on the first try. Trust Lakeland Engineering to provide reliable, high-quality Dranetz meters and the technical expertise to help you complete your project with confidence.
Contact us today to reserve your Dranetz meter or to learn more about how we support solar commissioning and testing.