The solar inverter is the brain of your solar power system. It converts DC electricity from panels to AC electricity for your home. Choosing the right inverter is critical for system performance and reliability.
Types of Solar Inverters
String Inverters: The most common type for residential and small commercial systems. All panels in a string connect to a single inverter. Cost-effective and reliable, but the entire string output is limited by the weakest-performing panel.
Micro Inverters: Individual inverters attached to each panel. Each panel operates independently, so shading on one panel does not affect others. Higher cost but better performance in partially shaded conditions.
Hybrid Inverters: Combine solar inverter and battery charger in one unit. Essential for systems with battery backup. They manage solar, battery and grid power simultaneously.
Sizing Your Inverter
The inverter capacity should match your solar panel system size. For a 5 kW panel array, you would typically use a 5 kW inverter. Some systems slightly oversize the panel array relative to the inverter (called DC oversizing) to maximize generation during non-peak hours.
Key Features to Consider
Look for high conversion efficiency (97%+ for string inverters), dual MPPT trackers for flexible panel orientation, built-in monitoring via Wi-Fi or cellular, IP65 or higher weatherproofing rating, and comprehensive warranty coverage.