When installing or upgrading solar panels on your boat, it's important to use panels that have matching electrical characteristics. Solar panels have specific voltage, current, and wattage ratings. When you connect panels together, the system will only perform as well as the lowest-performing panel; mismatches can reduce efficiency and put stress on your charge controller.

Mixing different types of panels can create imbalances. For example, when you wire panels in series, all panels must handle the same current. If one panel has a lower current rating, it will drag down the performance of higher-rated panels and lead to overheating or premature failure. Similarly, wiring panels with different voltage ratings in parallel can lead to unequal charging, which wastes energy and shortens the life of your battery bank.

To get the most from your marine solar array, choose panels with similar specifications or opt for a matched kit from a reputable manufacturer. If you need to expand your system, consult an expert to ensure your new panels are compatible. Properly matched panels will deliver more reliable power, minimise wear on your equipment, and provide a safer and more efficient energy solution on board.