It is recommended that routine inspections of your solar units are done at least once in every five years. This ensures the maximum productivity of your solar systems. You might want to consider a replacement or an upgrade under the following scenarios; Your system might be underperforming, you have decided to add the number of solar panels to your unit to have more power generation, you have decided to add battery storage as you might have additional or excess power generation or you might have decided to simply upgrade to the latest available technology.
Solar Power Pro expertise in complete solar unit solutions and can certainly help you with replacements and upgrades.
