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Power Control System Installation Guide
for LG Electronics ESS Home 5/8 (RBA005K0A0F / RBA008K0A00)
Power Control System for the LG Electronics ESS Home 5/8
y The Power Control System (PCS) of LG Electronics ESS Home 5 and 8 is an a Supplementary PCS. Supplementary PCS are systems or devices intended
for use in circuits with an overcurrent device suitable for service, feeder, or branch circuit protection.
y The PCS shall comply with NEC 210.20, 705.12 or NFPA 70 2020 edition section 705.13
y The LG Electronics ESS Home 5/8 supports Import Only Mode as a PCS Operating mode for PCS functionality.
– Import Only Mode ensures the LG Electronics ESS Home 5/8 never exports any active power to the grid (Area EPS).
y The LG Electronics ESS Home 5/8 provides three system working scenarios: PV Self-consumption, ToU (Time-of-Use), and Backup only. If the PCS
functionality is enabled, all working scenarios will operate within the constraint of the Import Only Mode.
Home 5/8 Components
y The LG Electronics ESS Home 5/8 (RBA005K0A0F / RBA008K0A00) consist of two different devices: the SE Box and the Home 5/8. These devices are
needed to use the PCS functionality. The following table shows the devices required for PCS functionality and their part number.
y The Export Limit CTs are assembled in a UL-approved factory line, where the direction has been verified. These CTs do not need to be installed on the site.
y The Export Limit CTs sense the current of the SE Box PCS-controlled conductor.
y The PV CT is only intended for monitoring, which is not covered by PCS functionality
INFO
y It is only possible to set PCS to enabled or disabled in the field through the SE Box HMI LCD.
(No set value of current)
y When PCS is enabled, the "Import Only Mode" is fixed in the software.
<Table 1. Part Numbers & Ratings>
Device
Part Number
RA500K16A11 /
Home 5 / 8
RA768K16A11
SE Box
(PCS Controller,
REA200AP0
Export limit CT)
- 1 -
Copyright © 2023 - 2024 LG Electronics Inc. All Rights Reserved.
Maximum continuous
output current
20.84 A / 31.25 A
(@240 V)
160 A (@240 V)
*
M
F
L
7
2
0
2
9
0
0
1
R e v . C 1 7 / 0 4 / 2 0 2 4
http://www.lg.com/us/ess
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Summary of Contents for LG Home 5
- Page 1 Power Control System for the LG Electronics ESS Home 5/8 y The Power Control System (PCS) of LG Electronics ESS Home 5 and 8 is an a Supplementary PCS. Supplementary PCS are systems or devices intended for use in circuits with an overcurrent device suitable for service, feeder, or branch circuit protection.
- Page 2 The LG Electronics ESS Home 5/8 supports “Import Only Mode” of PCS operating mode as the AC-coupled ESS and the backfeed current of the ESS is limited by zero. On the label below, write the back feed current by the PV inverter only.
- Page 3 Sum of total ampacity of Backup Breaker and Non-backup Breaker should not over 200 A. In case that the sum of total ampacity of PV system and ESS system(Home 5/8) is over 200 A, LG Electronics ESS Home 5/8 PCS shall require the PV+ESS Combiner panel with the dedicated circuit breaker for PV+ESS input of SE Box to meet the PCS requirement.
- Page 4 PV System should be considered as main panel busbar sizing. LG Electronics ESS Home 5/8 PCS shall require the dedicated breakers of SE Box main connection, PV circuit, ESS circuit, Backup panel and Non-backup panel. Sum of total ampacity of Backup Breaker should not over 200 A.
- Page 5 <Label 1. For PCS-Controlled Current Setting> y Label 1 is used to indicate the set current limit value. y In LG Electronics ESS Home 5/8 system, the available back-fed current to main panel or the area EPS is only PV system.
- Page 6 Labelling and Circuit breaker connections Label 5 can be used to block the non-backup port connection when the ampacity of the backup panel is 200 A in all cases. <Figure 4. Circuit Breakers Installation & Label Positions : PV and ESS connected to SE Box respectively> Label 4 Label 1 Label 5...
- Page 7 For breaker sizing, refer to the each diagram in Figure 1 ~ Figure 3. If the detailed breaker sizing calculation is required depending on the site conditions, please contact LG Sales Engineer with the site information. – Single line diagram, PV inverter brand and model name, breaker sizing and busbar sizing of each panels, service ampacity y If PCS functionality is not required for the installation, it is not necessary to put all labels.
- Page 8 Grid Meter and PCS Setting in the Setup Wizard Tap “Not Confi rmed” on the Power Control System y Once the system is confi gured as a PCS, the Home 5/8 continues to run in Import Only Mode for the ESS. The ESS will never export ESS active power to the SE Box upstream, which means that the ESS will never backfeed the active power to the Area EPS.
- Page 9 Checklist for PCS Functionality Check points Confirmation Was the breaker sizing correctly installed by following the LG instruction guide? Was the dedicated circuit breaker of SE Box installed? Was the dedicated circuit breaker of PV system installed? Was the dedicated circuit breaker of ESS system(Home) installed?