NEC & OESC require that any outdoor communications cables be grounded and protected by a surge protector within 10 ft of entering a home/business; in wireless installs, the EMU is located remotely with the wireless sender and  the receiver near the house/building with the internet connection; will the surge protector/primary protector on the wireless cable interfere with the EMU's internet connection???

Comments

Very good question.  Here are a few key points for connecting the Enphase Envoy EMU: 
  1. It needs to plug into the electrical service of the house with no power strip or surge protector between it and the outlet.  The surge protector will interfere with the signal.
  2. There needs to be an "Always On" broadband router (cable or DSL) in the house - to which it connects with an ethernet cable
  3. It uses Power Line Communication (PLC) to scan the microinverters - this means that you may be able to just plug it in near the router in the main house. If there are no transformers or noisy circuit breakers/ connections between the Envoy and the circuit with the microinverters, it will see them just fine. So, anywhere on the same side of the meter / service panel as the inverters.
  4. If there are obstructions to PLC, then you have to  plug the Envoy into the same sub-panel as the inverter circuit and run an ethernet cable  back to the router in the main house (in conduit).
  5. I've also used a wireless bridge, but you probably want to avoid that hassle and should not need it.

Jon,

current OESC requires a primary protector ( surge protector ) on any Class 2 & 3 cable within 10 ft of entering any building where people may be present; and, on terminations at structures where there is potentially human contact and the Cat5/6 provides a path for voltage surges/lightning strikes; also, separation of Class 1 ( power & lighting ) cables and Class 2&3 cables by 2" unless protected by a non-conductive barrier - hard to do with cable plug arr't on EMU;

application is for a tracker system with the 'ideal' location ~350' from utility pole, and a further 75 - 80' to house ( farm buildings, sheds ); would seem to be beyond range of Cat5 cable so wireless may be only way; what wireless systems have you used???; any long term/temp issues???

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14 years ago
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