The number of solar panels you can have depends on various factors, including the policy of the grid operator, the capacity of your electricity connection, and the available space on your roof.

In the Netherlands, there is generally no specific limit on the number of solar panels you can install. You can install as many solar panels as you want, as long as your electricity connection and the electricity grid can handle it.

However, it is important to consider the capacity of your electricity connection. The capacity is expressed in amperes (A) and determines the maximum amount of electricity you can simultaneously draw or inject into the grid. Too many solar panels can lead to an exceedance of the capacity of your connection, which can cause problems.

Therefore, it is wise to contact your grid operator or a professional solar panel installer to check the capacity of your electricity connection and discuss how many solar panels you can safely install. They can advise you on the optimal configuration and any necessary adjustments to your electricity connection.

It is also important to consult local regulations and building codes, as there may be restrictions on the number of solar panels or specific requirements regarding their placement and aesthetics.