Solar Panel / Inverter Compatibility

What is the difference between a string inverter and a microinverter?

A string inverter connects multiple panels in series and converts their combined DC output to AC at one point. If any panel is shaded or underperforming, it drags down the entire string's output. Microinverters attach one-per-panel, converting each panel's DC to AC independently — shading one panel has no effect on the others. Microinverters cost more upfront but excel on roofs with partial shading, mixed orientations, or where panel-level monitoring matters. String inverters offer better cost efficiency on unshaded, simply-oriented installations.

How do I match panel wattage to inverter capacity?

A common and acceptable practice is to oversize the total panel wattage relative to the inverter's AC output rating by 10 to 25 percent — called DC oversizing or clipping. For example, pairing 500W of panels with a 400W inverter improves morning and afternoon production without damaging the inverter. Most installers aim for 110 to 125 percent of inverter AC capacity. Exceeding 150 percent risks inverter damage or warranty voiding. You must also verify that the panel array's open-circuit voltage (Voc) does not exceed the inverter's maximum input voltage, especially in cold weather when Voc rises.

Do all solar panels physically connect to all inverters?

Most solar panels use MC4 connectors as the standard physical connection, so they physically connect to any inverter that accepts MC4 inputs. The electrical compatibility is what varies: the panel's open-circuit voltage and short-circuit current must fall within the inverter's acceptable input range, and the panel's operating voltage must overlap with the inverter's MPPT (Maximum Power Point Tracking) window. Check the inverter's datasheet for its Voc max, Isc max, and MPPT voltage range before pairing any panel.