Enphase M215 Service Manual download pdf (Page 11)

M215 Installation and Operation

Grounding Considerations

With the M215-60-2LL-S22-IG, S23-IG, or S24-IG, the DC circuit within the M215 is isolated and insulated

from ground. Ground fault protection (GFP) is integrated into the microinverter. Because of this, the

M215-60-2LL-S22-IG, S23-IG, and S24-IG do not require a GEC. As a result, they take less time to install

than other microinverters, save money, and increase safety.

If you are installing the M215-60-2LL-S22, S23, or S24, a GEC or other compliant grounding method is

required.

TIP: If installing a mix of IG (Integrated Ground) and non-IG microinverters, install the

non-IG microinverters closer (electrically) to the junction box to minimize GEC use.

Utility Service Requirements

The M215 Microinverter works with split phase 240 VAC service or with three phase 208 VAC service.

Measure AC line voltage at the electrical utility connection to confirm that it is within the ranges shown:

240 Volt AC, Split Phase

208 Volt AC, Three Phase

L1 to L2

211 to 264 VAC

L1 to L2 to L3

183 to 229 VAC

L1, L2 to neutral

106 to 132 VAC

L1, L2, L3 to neutral

106 to 132 VAC

Branch Circuit Capacity

Plan your AC branch circuits to meet the following limits for maximum number of M215s per branch when

protected with a 20-amp over-current protection device (OCPD).

Maximum number of M215s when protected with a 20 A OCPD

Service type

Max M215s per AC branch circuit

Split phase 240 VAC

Three phase 208 VAC

Lightning and Surge Suppression

Enphase Microinverters have integral surge protection, greater than most traditional inverters. However, if

the surge has sufficient energy, the protection built into the microinverter can be exceeded, and the

equipment can be damaged. For this reason, Enphase recommends that you protect your system with

lightning and/or surge suppression devices (see table). In addition to having some level of surge

suppression, it is also important to have insurance that protects against lightning and electrical surges.

Residential

Commercial

 Citel DS72-RS-120 surge protector; data sheet

 Delta LA-302 lightning arrestor; website

 Leviton 51110 or 51110-001; whole house surge protection

panel; website

 Midnight solar surge protection device MNSPD-300 or

MNSPD-300FM (with flush mount box); website

 Citel DS73-RS-G surge protector; data sheet

 Delta LA-303 lightning arrestor; website

NOTE: Protection against lightning and resulting voltage surge must be in accordance

with local standards.

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Enphase M215 Service Manual Page 11

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