An MPPT (or Maximum Power Point Trackers) are built into inverters and their primary role is to allow the inverter to automatically extract as much power as possible. This is done via an algorithm which makes the system operate at the most efficient voltage. This allows them to detect and correct some of the voltage and current variations between each module, resulting in higher output across the connected string(s).

A Microinverter is different to an optimiser in the sense that an optimiser is taking DC from the module and optimising this to make it more palatable for the inverter. Whereas a Microinverter converts the DC power to AC directly behind the module itself. Microinverters share a lot of benefits with optimisers in terms of module specific monitoring and shade optimisation and are considered to be a very safe solution when you consider that DC power is isolated to the roof and everything back inside the property is AC.

Beyond MPPT’s there are optimizers. They sit between each panel and the inverter and optimize the panel output. This process may increase price on the installation but it will bring unparalleled benefits.  The optimizer isolates panel-specific issues to the connected module, so only individual modules will be impacted by things like shading. Additionally, an optimizer behind each panel even allows you to monitor, right down to the module level.