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Difference between string and micro inverters?

Jeffrey McCormic

What is the difference between string and micro inverters like \Enphase?

1 Answer
Best Answer

The answer is there in FAQ section of our website home page, "Both technologies have their pros and cons. String/Central inverters are used when the array will not experience shading; mainly for trackers. Microinverters allow you much more freedom with your installation. They are mounted under each panel and plug directly into the panel's junction box. Enphase microinverters isolate each panel which reduces the effects of shading, panel mismatch and non favourable orientation. They also feature maximum power point tracking (MPPT) at the module level which increases array production by up to 5%-20%. Pros: the installation is usually cheaper. Micro inverter’s initial cost is 20-40% higher than String inverter, however String inverters usually will need to be replaced within 10-15 years. On the other hand Micro inverters have over 300 years projected mean time between failures (MTBF).Pros: they yield more electricity. They are a better option if your roof is partly shaded by trees, a chimney, or facing different directions or angles. The warranty is usually longer. Cons: higher initial cost."