Power Optimizers Inverters
Like microinverters, power optimizers are located at each panel. However, instead of converting the DC electricity to AC electricity at the panel, they ‘optimize’ the DC electricity before sending it to a central inverter. This approach results in higher overall efficiency levels than with a conventional string inverter. 
Tigo Energy 300W Solar Panel Maximizer DC Optimizer
Module Maximizer ES050V300W-4W, 52 Voc Max DC input, 16 to 48Vdc input range, 300W maximum power, MC..
$52.68
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