Can photovoltaic panels with different power and voltage be connected in parallel

No, it's not advised to wire solar panels with different current in series. They should be wired in parallel if they have different current. Can you put solar panels of different voltage in parallel?

Connecting solar panels in parallel is just the opposite of series connection and is used to increase the total output current of the array, and hence the total output power while keeping the same voltage. 'The same voltage' is the system voltage which for off-grid solar panels systems is usually as low as either 6V or 12V.

When connecting different solar modules, it's not the different wattage, it's actually the current (for series connection) and voltage (for parallel connection) that could drag down the performance of the solar array composed of those modules. Only solar panels of exact or similar current should be wired together in series.

When you connect solar panels in series, the total output current of the solar array is the same as the current passing through a single panel, while the total output voltage is a sum of the voltage drops on each solar panel. The latter is only valid provided that the panels connected are of the same type and power rating.

The solar panels are of voltage rating higher than the system voltage. You have two different higher voltage solar panels, i.e., one 100W/24V and one 200W/24V that you want to connect to the already working 12 V solar power system comprising the two 12V 50 W solar panels connected in parallel from the previous scenario (see the picture above).

The other system components, such as a charge controller, battery, and inverter. There are two main types of connecting solar panels – in series or in parallel. You connect solar panels in series when you want to get a higher voltage. If you, however, need to get higher current, you should connect your panels in parallel.