Appendix D - Installing Battery-Based Inverters; Installing A Microgt 500 Pv System With Sub-Panel - Magnum Energy MicroGT 500 Owner's Manual

Appendix D – Installing Battery-based Inverters
Appendix D – Installing Battery-based Inverters
MicroGT 500 microinverters are specifi cally designed to communicate
with Magnum inverters in a battery backed inverter system.

Installing a MicroGT 500 PV System with Sub-Panel

Adding a sub-panel to your basic PV system (Figure 12) allows you
to continue to power essential loads during utility outages, and it
allows for an easy transition to an AC coupled system (adding a
battery-based inverter system between the main and sub panels).
Note: The instructions for installing a MicroGT PV system with a
sub-panel are identical to those for installing the basic PV system in
the previous Installation section (except for Step 2a). Refer to those
instructions for additional info and cautions during installation.
To install a MicroGT 500 PV system with a sub-panel:
1. Install an appropriate junction box at a suitable location on the
PV racking system (typically at the end of a branch of modules).
2. Connect the cables to the AC branch circuit junction box.
a. Route the open ends of the AC connector cable and the AC
branch circuit cable (from point of utility through the sub-
panel per Figure 12) in to the junction box. Secure both
cables using an appropriate gland/strain relief fi tting.
b. Connect the AC wires from both cables inside the junction
box (L1-RED; L2 - BLACK; NEUTRAL - White; see Figure 4).
Note: Be sure to size the AC wire to account for any voltage
drop between the AC branch circuit junction box and the point
of utility interconnection. See Table 1.
3. Mark the location of each MicroGT 500 inverter on the PV rack—
keep in mind the location of the AC branch circuit junction box
or any other obstructions.
4. Mount and attach a MicroGT inverter at each of the identifi ed
locations using hardware recommended by the PV module
racking manufacturer (Figure 5).
5. Connect the DC cables from the PV modules to the MicroGT 500
microinverters using the MC4 connectors (Figure 6).
6. Connect the grounding electrode conductor to the MicroGT 500's
ground clamp (Figure 7).
7. Plug the female AC connector of the fi rst MicroGT inverter into
the male connector of the next microinverter (Figure 8), and so
on, to form a continuous AC branch circuit.
8. Install a protective end cap on the open AC connector of the last
microinverter in the AC branch circuit (Figure 9).
Refer to the Operation section in this manual for info on connecting
the MagWeb GT and activating your MicroGT PV system with a sub-
panel.
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