Planning & Design
Overview
Using Enphase Microinverters dramatically simplifies system planning by eliminating DC string design and allowing for flexible placement and orientation of arrays.
For help planning your next Enphase installation, please look through our design resources or attend a free training session.
Design Resources
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Frequently Asked Questions
What PV connectors does Enphase support?
Enphase supports Multi-Contact MC3 connectors referred to as our S01 or S11 (non-locking style) and Multi-Contact MC4 connectors referred to as our S02 or S12 (locking-style). Enphase also supports Tyco Solarlok connectors referred to as our S13 (locking style).
| Multi-Contact MC3 | Multi-Contact MC4 | Tyco Solarlok | |
|---|---|---|---|
| M175 | -S01 | -S02 | N/A |
| M200 | -S01 | -S02 | N/A |
| M190 | -S11 | -S12 | -S13 |
| M210 | N/A | -S12 | N/A |
How many Enphase Microinverters can be on a single branch circuit?
Following are the maximum Microinverters per branch circuit:
M175 – 240V split-phase power – 16 Microinverters per branch circuit
M175 – 208V three-phase power – 24 Microinverters per branch circuit
M190 – 240V split-phase power – 15 Microinverters per branch circuit
M190 – 208V three-phase power – 21 Microinverters per branch circuit
M200 – 240V split-phase power – 14 Microinverters per branch circuit
M200 – 208V three-phase power – 21 Microinverters per branch circuit
M210 – 240V split-phase power – 13 Microinverters per branch circuit
M210 – 208V three-phase power – 18 Microinverters per branch circuit
There can be an unlimited number of branch circuits per installation.
How many branch circuits (total) can I have?
The Envoy Communications Gateway (EMU) can currently manage a maximum of 250 microinverters. For systems larger than 250 modules/microinverters, additional Envoy Communications Gateways can be added. If more than one Envoy is used, a Line Communications Filter would be required to contain the communications from one group of 250 microinverters. The maximum number of branch circuits would depend on the model of microinverter chosen. For example: 16 branch circuits with 15 M190-240V microinverters could be supported by a single Envoy gateway
Do all my modules need to match?
No. One of the advantages of a microinverter system is that it allows for mixing modules. Unlike traditional inverters that are based on a string installation, the Enphase branch circuit approach allows for varying power output levels. This also means that end-user customers have the flexibility of adding or changing modules over time.
Do I need an A/C disconnect on my roof for each Enphase branch-circuit?
This varies by Authority Having Jurisdiction (AHJ).
On a 208v three-phase installation, do I really need all three phase conductors from the service-entrance, or will two suffice?
A three-pole breaker is needed in the load-center, and it is necessary that you pull three phase conductors and a neutral, to the head of each Enphase branch circuit.