Over sizing your solar panel array in conjunction with the right solar controller is a strategic move that promises several advantages, especially to deal with harsh winters, frequent cloudy days, or panels that might face dust and age-related efficiency loss. Also, panels are rated using artificial light that’s 1000W/sqm at 25C, scenario that highly differs for real life use.
Here’s why this approach is a savvy choice:
Here’s why this approach is a savvy choice:
Take, for instance, a Victron 100/20 MPPT controller. By connecting four 250W panels in a 2S2P configuration (~74V Voc & 18.5A Isc) to charge a 24V battery bank, you maintain constant energy input, yielding roughly a fairly constant 480W output. This means during the bulk of daylight hours you’ll produce a constant 20A (max output of MPPT).
To make the most of oversizing, it’s crucial to pair your solar panels with an appropriate solar controller that can handle the extra capacity. This ensures optimal energy conversion and management.
