Sld - Ac Coupled Pv System With Back-Up Power Operation - Duracell Power Center Core Install Manual

3.3 SLD - AC Coupled PV System with Back-up Power Operation

The single line diagram shown below is a representation of a typical installation configured for utility interactive
and back-up power operation, including AC coupled PV. This drawing is a guideline only and is not a substitute
for a code compliant installation. All components required for a code compliant installation are the
responsibility of the licensed installer, including any additional circuit protection requirements not shown here.
Figure 8: Sample single line diagram of an AC coupled solar plus storage installation.
NOTES
1 - The backup power bus must be electrically isolated from the main electrical bus. Do not tap the neutral wires of the main
and backup buses. Refer to the installation manual for wiring details. Load circuits are shown for demonstration. Maximum
number of circuits determined by sub-panel rating. Loads connected to circuits must not exceed nominal power ratings
(continuous/surge) of the inverter.
2 – The battery system must be earth bonded to the building ground to meet lightning protection requirements.
3 – Line side tapping of the electrical service required for 200 Amp service panels.
4 - CTs are equipped with 8 ft pigtails. Twisted pair extensions can be run up to 30 feet. Arrow on CT indicates direction.
5 – Ethernet is recommended. EMC can also communicate via Wi-fi.
6 - Cable referenced 'E' uses 5 conductors only.
7 – Total combined PV output must not exceed 10kW AC during backup operation. PV systems larger than 10kW AC must have a
self curtailment mechanism (software or hardware) to ensure limit is within the 10kW AC rating. If curtailment means are not
available, balance of PV (if applicable) must be routed directly to the main panel. The fused disconnect shown assumes
combined output rating. PV system design is the responsibility of the installer.
Disclaimer:
Manufacturer supplied components represented here are limited to the PCS/Battery, Power Center™ Core Hub, CTs and
communication/control cables. All other materials and components represented are customer supplied. CEC/NEC electrical
code compliance is the responsibility of the designer and/or electrical permit holder.
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