What is an inverter, and where does it go?

The inverter is the heart of the whole solar system. It converts the electricity coming from the solar panels from direct current (DC) into alternating current (AC), which can then be used to power your appliances, or exported to the grid. The location of the inverter is an important factor in system design, and it's something that your UPowr Certified Installer will discuss with you. Here’s an overview of what’s taken into consideration when choosing where to install it:

Distance from solar panels

The further away the inverter is from the solar panels, the longer the cables need to be. As small amounts of energy are ‘lost’ every time it’s transported, the longer the cables are, the more energy will be lost as the panels will have to work harder to ‘push’ the current a longer distance. Ideally, the distance between the inverter and panels is kept to a minimum (within 3 metres of the switchboard).

Distance from switchboard

Similar to minimising the distance between the panels and the inverter, it’s also ideal for the inverter to be located close to the switchboard of the house. This also helps to reduce the losses that are associated with long cable runs. 

Protection from the sun

Inverters are complex devices that don’t like to operate at high temperatures. Although they are very efficient - they will still generate some heat. While a little heat is okay, if they're installed in full sun, they may start to reduce their output to prevent overheating. If it's necessary to install the inverter in a position that exposes it to direct sun, it's recommended that a shading device be installed to provide protection and to ensure the inverter is operating according to its warranty specifications.

Noise 

Although modern inverters are almost silent, they do produce some noise, particularly in the morning and afternoon as the sun is rising and setting. Generally, if it's installed on an outside wall, you will never notice this. However, if it's installed in a garage that is also used as an office during the day, you may want to reconsider the location. 

Mounting surface 

It is a requirement in Australia that the inverter and associated wiring not be installed on combustible material such as timber or plastic. Safety always comes first in the installation of electrical equipment, and all measures must be taken to make the whole system fail-safe. 

Clearance

Each inverter manufacturer has installation guidelines that specify the required clearance around the inverter. This is to allow for proper ventilation and cooling during operation. 

Access to WiFi

The inverter will communicate with online monitoring platforms over your WiFi network. Ideally, your existing network is located in a position to provide adequate signal to allow the inverter to send data to the monitoring platform. However, if this is not the case, then you may want to consider either a Wi-Fi booster, a 4G module add-on for the inverter, or potentially repositioning your router. 

In the lead-up to installation, you’ll be able to let us know if you have any concerns with the location of the inverter. Your installer will then discuss this with you on installation day.