People are of the opinion that upgrading an existing solar power system is as easy as adding a couple of solar panels on your roof. Salesmen often sell this idea by offering a 1.6 kW system with an upgradeable 5 kW inverter. You therefore have the option of upgrading at a later stage. This is okay if you plan to upgrade within a six month period, but there is a problem if you plan to upgrade your system a few years down the line.
The size of your solar power system should match your inverter
Firstly, when installing a solar power system matching the inverter with the amount of solar panels you wish to have is preferred. This means that if you plan to buy a 1.8 kW system you should ideally match it to an inverter with a similar output. So, if you have a 1.8 kW system, you should match it to a 1.8 kW inverter.
The reason being that if you have a system that is too small for your inverter it often happens that there is not have enough energy coming down the line to kick over the inverter. You then sit in a position where you are not getting the output efficiency you were hoping for.
Solar panel technology is rapidly changing
Secondly, as with all technology, solar panels are changing very quickly. What this means is that if you try to match three year old solar panels with new panels they will not integrate very well.
The best way to bypass this problem is to keep your current solar system intact and install a new system. So, if you have a 2kW system and you want to upgrade to a 6kW system you will install a 4 kW system next to it.
Check your equipment
Lastly, you will need to have a look at the condition of your system. You have to inspect your panels for signs of corrosion and make sure there is no signs of yellowing and browning. The cables as well as the seals should also be inspected to make sure they are still intact.