Regular upkeep is key to maximising the profitability of your solar investment.  We continually improve functionality through our maintenance visits, thus maximising revenue for our clients.

Shaun Oxley – Contracts Manager, Operations & Maintenance, NWT Energy


Solar PV panels require an annual clean in order to stop lichen and dirt building up. By having your system professionally cleaned at least once a year will ensure a robust performance. Our professionals use a high-performance, customised cleaning system that will remove all debris and ensure maximum yield from your installation. Once surface dirt collects on your panels, there will be substantial reductions in the amount of electricity being generated, so a clean system is a productive system.

Periodic cleaning is essential in order to ensure maximum yield from the installation by ensuring that they receive as much sunlight as possible, as well as to prevent electrical issues that can arise from long-term partial shading of PV modules. Book your annual cleaning with NWT Energy and let us ensure your return on investment is maximised.

Download the NWT Energy cleaning brochure for more information.

Monitoring, cleaning and repairing solar PV panels.
Cleaning solar panels to rectify performance issues and ensure they generate to full potential.

Electrical testing

Our experienced engineers, carry out all manner of electrical testing to ensure that any issues are identified and rectified promptly. During our visit we are physically checking all connections and assessing any poor insulation resistance, indicating water ingress into the system, and poorly made off D/C connections between the panels, which in time will result in high resistance in the connecting joints, causing significant generation losses followed by potential arcing and fire risk, also resulting in substantial system down time. We check for loose connections as a fire prevention measure and also to stop the system from continuous tripping incidents. During the inspection, we check all AC and DC isolators for poor or incorrect terminations, string failure, water ingress, monitored system faults, cable bunching, vegetation and rodent infestation, amongst other things, in order to prevent any generation losses and reducing your annual income.

On completion of the test, we will issue you with a full inspection report and inform you of any pressing issues, in order of priority. Most insurers are now requesting compliance to a maintenance service contract to ensure your PV system is being annually inspected and maintained, so NWT Energy can be your trusted partner to ensure your installation is optimised and insurable.

Download the NWT Energy testing brochure for more information.

A system that is tested regularly operates efficiently and any electrical issues can be rectified.


NWT Energy installations are supplied with monitoring technology as standard, allowing you to keep track of the amount of electricity generated, analyse data to establish when the generation has occurred and match energy use with solar generation. This way we are able to get an overview of how the PV installation is performing and if there are any fault alerts on your system.

Battery storage tech is now efficient and affordable thus has given a whole new role of the effectiveness of PV monitoring when considering battery storage. Data from monitoring systems will be key to understanding the import and export of the solar generation to ensure battery sizing is correct.

Without having a suitable method for identifying issues with a PV system, it is impossible to know whether it is operating as intended. NWT Energy repeatedly encounter systems that contain no monitoring apparatus whatsoever and in many cases substantial revenue has been lost because the owners were not aware of underlying issues with their PV systems.

Monitoring systems give visual representations of system performance that can be used to identify any potential problems at a glance. Generation figures can also be directly compared with projections, giving an indication of the health of the system versus expected performance. They also have the capability to dig deeper into the performance of inverters and to generate alert emails when there is an issue that requires immediate attention.

NWT Energy can install a monitoring system on an existing solar installation, to ensure you experience all the benefits.

Download the NWT Energy monitoring brochure for more information.

Monitoring technology allows you to keep track of electricity generated and access the performance data.