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Question Install one GridBoss with one remote FlexBOSS21 and one power conduit

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 gare
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Existing: 200 amp meter/main with distribution panel with a 100amp 2-pole breaker feeding a shop panel 100 feet away. There are two existing conduits, one 2” and one unused 1”. We need to do connections so that the bussing of the meter/main/distribution is not subject to the 120% rule. The existing meter/main/distribution (MMwD) has the main breaker centered on the bus.

The modules and batteries will connect to a flexBOSS21 at the shop, about 100 feet detached from the residence. Can we use the flexBOSS21 output to feed a the 100amp shop loadcenter via  a 90amp main to which we will add a breaker to feed out to the GridBOSS Hybrid Inverter 1 connection?

The gridBOSS will be programmed for ZERO back feed, no adder to the utility bussing. The GridBOSS will have:

  • Utility connection via a 100 amp breaker in the MMwD panel
  • 8kw generator to the generator input
  • FlexBoss21 connected to hybrid inverter 1 input
  • A new panel with backed up loads in it
    1. Non-backed up loads will stay in the
      MMwD

Should the MMwD have zero loads in it, except the feed to inverter, and a non-backed up panel connected to the GridBOSS as well as the backed-up load panel? – I see those two connection points on the GridBoss.

Should the FlexBOSS 21 feed the loadcenter via its LOAD or GRID connection? Then, would it become a Smart Load or AC Coupled input versus a Hybrid Inverter 1 input to the GridBOSS? Or, if it is done as GRID, will the GridBOSS manage whether there is an adder to bussing of the MMwD?

There are two conduit runs to the shop, one 2” for power, one 1” for communications. We are trying to NOT have to add a new conduit to what is already there. I have hopefully uploaded the proposed connection, though I left the EG4 verbiage to NOT connect to the load of the FlexBOSS.

Proposed

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