Solar-powered inverters are at the core of every photovoltaic solar energy system, converting DC electricity into AC power that can be distributed throughout your home or returned back to the grid.
There are three primary categories of solar inverters. String inverters provide affordable solutions by transmitting all DC power to one central inverter, while microinverters deliver more efficient results by optimizing each individual panel’s DC power at the cost of more per kWp.
Choosing the Right Inverter
As the core component of an off grid solar power system, your inverter plays many essential roles. Perhaps most visibly, its role lies in DC to AC conversion: turning direct current (DC) electricity produced by your solar panels into alternating current (AC), so household appliances can use it.
Inverters serve an essential purpose: they bridge the gap between your solar array and the grid, provide system monitoring features, and include advanced safety features. As such, it’s imperative that you select an inverter suitable for your unique off grid power requirements.
First step to selecting an appropriate inverter size: make a list of all electronic devices you plan on running off grid, and calculate their total power consumption. This should be available on each device’s wattage rating label; alternatively, some manufacturers’ websites may contain more details. When compiling your list, be sure to include both average power draw as well as surge wattage (typically listed under Peak Watts in inverter descriptions).
With this information in hand, it should be possible to compare the power requirements of various inverters in order to find one best suited to your needs. However, other considerations could play an integral part of making your choice, such as:
Installation
The inverter is a piece of equipment that transforms direct current electricity produced by solar panels into alternating current, as well as monitoring and reporting power production and usage. Depending on which system you purchase, this may also integrate with an online or mobile monitoring system for added peace of mind.
Installing your home power inverter requires careful planning, using appropriate tools and equipment, and adhering to safety guidelines. Begin by assessing your energy needs and selecting an ideal location for solar panels and inverters before getting any permits or approvals necessary. Finally, hire an electrician and gather necessary tools and materials for installation.
Before installing your inverter, ensure the area selected for installation is dry, protected from direct sunlight, and easily accessible. Check that its DC input terminals are clear of debris and all connections secure before connecting positive and negative wires according to manufacturer’s instructions.
Once all connections are secure, it’s time to turn on your inverter. Be sure to watch for a few minutes to ensure all settings have been configured correctly and look out for any error messages or error-related messages on the display panel. If everything seems OK, start producing renewable energy!
Maintenance
Maintaining an efficient solar powered inverter is critical. A preventive maintenance schedule should include regular monitoring via apps or web portals and periodic inspections of the inverter itself, checking for signs of corrosion or damage as early as possible to reduce unplanned downtime and other issues.
Checking for dust filters, cooling fans and air vents that are free from obstructions are other key aspects of maintenance for inverters. Since inverters produce heat during operation, it is crucial that they are adequately cooled in order to avoid overheating and decreasing efficiency. It is also imperative that loose, corroded or damaged wiring be checked; any such issues could compromise inverter performance, safety and lifespan.
Error codes and lights on an inverter’s screen should also be monitored regularly, as they could indicate something is amiss with it and require professional intervention as soon as possible. If it shows red or any color other than green on its display screen, that could signal overheating or an isolation issue; both common causes of inverter failure that must be taken seriously. It is recommended to store or shelter your inverter for maximum protection against extreme weather conditions and sunlight.
Troubleshooting
Installing the ideal solar inverter in your solar panel system is one of the key components to creating a successful renewable energy setup. However, all technology may encounter issues at some point and you should know whether your inverter needs professional repairs or whether some easy DIY repair might do just as well.
Check to see if your solar inverter’s circuit breaker has been tripped, then switch it back on. If it trips again, this may indicate a serious fault and should be reported directly to your original system supplier/installer (note that there may be a call out fee if your issue falls outside your warranty claim).
Solar inverters often experience issues when their batteries don’t function correctly, as these serve as backup power sources to provide power even when the sun doesn’t shine. Old or damaged batteries won’t provide sufficient electricity and must be replaced for adequate power delivery.
Other potential issues could include wiring and ground faults. These could be caused by loose connections or moisture damage. Therefore, it is recommended to periodically inspect your wiring for these types of issues.