Description:

Description

Enphase IQ6+ vs M250 vs M215 Microinverters

The new Enphase IQ series micro-inverters are the current generation of Enphase micro-inverters we provide in our kits.  The IQ6 is used with 60 cell panels and IQ 6+ with 60 or 72 cell panels up to 400w.  These are the most cost effective in the industry presently.  The IQ series introduces a double insulated design and reduces the AC Trunk Cable from 4 to 2 wires.They continue to carry the industry leading 25 Enphase Warranty.

IQ 6+ - The Enphase IQ6+ is optimized for solar panels from 250-400w and has the highest efficiency in the industry. It also simplifies installation going to a two wire (Red / Black)  system instead of the prior four wire system.  The IQ6 inverters allow up to 16 modules per trunk cable and the IQ6+ allows a maximum of 13. (This can be increased if using less than maximum wattage panels with the inverters, for example using 320w panels with these allow for 16 panels on a trunk cable).

M250 - The Enphase M250 is Enphase's fourth generation micro-inverter.  Optimized for solar panels from 210-300w it has the highest efficiency in the industry. It also simplifies installation with the addition of DC circuit isolation, no separate ground is required during installation. CEC rated efficiency is 96.5%.

M215 - The Enphase M215 is Enphase's third generation micro-inverter.  Optimized for solar panels from 190 - 260w it has  the same efficiency as the M250 micro-inverter. It also simplifies installation with the addition of DC circuit isolation, no separate ground is required during installation. CEC rated efficiency is 96%.

An important note: CEC efficiency ratings can be misleading.  Most laymen would not understand what it means but unfortunately most of the industry uses this and it can create unrealistic expectations.  

In fact, Enphase micro-inverters have a "derate factor" of .82.  This means that you will get 82% of the DC power output as AC power.  So to most of us this means 82% efficiency in converting DC to AC.  For example, an M215 connected to a 260w panel will produce 260 * .82 = 213w AC.  Similar math applies to the M250 except that the newest can produce up to 262W because 320 *.82 = 262.4.