HG Cube Series User Guide
Table of Contents 1. Precautions Before Installation.....................................................................................................3 1.1 Charge and Discharge Warnings....................................................................................3 1.2 Transportation Warnings.................................................................................................4 1.3 Disposal of lithium batteries...............................................................................
1. Precautions Before Installation For more information about this product, please visit the official website: http://www.homegridenergy.com 1.1 Charge and Discharge Warnings • Only qualified personnel should work on a Li-Ion battery. • If the battery is to be stored for a long time, it should be recharged to 90% SOC every 6 months. • Recharge a fully discharged battery within 12 hours. • Do not connect the battery directly to a solar array. The array must be connected through an inverter.
1.2 Transportation Warnings • The battery must be transported in its original or equivalent package and in an upright position. If the battery is in its package, use soft slings to avoid damage. • Do not stand underneath a battery on any sort of hoist. Keep hands & feet clear. NOTE: • Batteries are tested according to UN Handbook of Tests and Criteria, part III, sub section 38.3 (ST/SG/AC.10/11/Rev.5).
1.4 Before Connecting • After unpacking, please check the product and packing list. If the product is damaged or parts missing, please contact HomeGrid. • Before installation, be sure to turn off the grid power and make sure the battery is in off mode. • Do not connect the battery to AC power directly. An inverter must be used. • The embedded BMS in the battery is designed for 48V DC. DO NOT connect batteries in series. • Make sure that the battery system is grounded.
2. Introduction The HG Cube is an outdoor energy storage system enclosure that contains one to four of Lithion Battery’s “Stack’d” battery systems. And one to three 12 KW or 15 KW Sol-Ark inverters. It can store up to 153.6 KWh and provide reliable energy storage for several uses. It is especially suited for large homes or small businesses.
Slave #1 Master Inverter Power Distribution Box Figure 2-2: Left Side View with Inverters and PDB Page | 7
Figure 2-3: Right Side View Page | 8
Inverter Slave 2 Figure 2-4: Back View Showing Slave Inverter #2 Page | 9
2.1 Functionality The HG Cube can do the following: 1. Store energy from solar arrays for use later at night or when the wind isn’ blowing. 2. Peak shaving: power from batteries is used to reduce the maximum power drawn from the utility. This can result in cost savings in some jurisdictions. 3. Load shifting. Power from the batteries can be used to reduce the power drawn from utility during peak hours when rates are high. The batteries are recharged during off-peak hours when the rates are lower. 4.
2.2 Specifications • The HG Cube enclosure is 2,000mm high (78 inches), 2,220mm wide (87.5 inches), and 1,290mm deep (50.8 inches), not including the inverters which arre mounted on the outside of the enclosure. • The HG Cube uses lithium iron phosphate batteries (LiFePO4, or just “LFP”). LFP offers good energy storage density, long life, and is inherently safer than other chemistries. • The output voltage from the battery stacks is 48V.
Figure 2-5: Interconnection Diagram All four battery stacks are connected in parallel in the Power Distribution Box, as are the three inverters. The Master Battery Stack is connected to the other stacks over a CAN bus. The Master Stack is connected to the Master Inverter via a second CAN bus connection, and the Master Inverter is connected to the slave inverters via a third CAN bus. 3. Major Components: Stack’d Battery Stacks A HG Cube enclosure contains up to four Lithion Battery Stack’d battery stacks.
3.1 Stack’d Configuration Each battery stack consists of a base unit, two to eight battery modules, and a battery management module. Each battery module can store 4.8 KWh. So a single stack can store from 9.6 KWh to 38.4 KWh. A single HG Cube enclosure can contain one to four battery stacks. The total energy stored is therefore 9.6 KWh to 153.6 KWh. One of the battery stacks is configured as stack 1, the master stack. The others are configured as slave stacks 2 through 4.
HVAC Unit HVAC Unit Battery Stack #1 Battery Stack #2 Figure 3-2: Front View with Doors Open Battery Stack #3 Battery Stack #4 Figure 3-3: Rear View with Doors Open Page | 14
4. Major Components: Sol-Ark Inverters Each HG Cube enclosure includes one to three Sol-Ark 12 KW or 15 KW inverters. The inverters are mounted outside the enclosure on the left side and the back. The inverters take 48 VDC from the battery stacks and output 120/240/208 Split Phase VAC. See the Sol-Ark “Limitless 15L-LV Install Guide and Owner’s Manual” or the Sol-Ark “12K-2P User Guide” for details on the inverters. The master inverter is connected to the master battery stack controller via a CAN bus.
5. Power Distribution Box The Power Distribution Box is mounted on the left side of the enclosure under the master and slave #1 inverters. It contains two large bus bars, one for battery positive and one for battery negative. All four battery stacks and all three inverters are connected to these bus bars. Each connection point includes a 500A fuse.
Figure 5-2: Inside the Power Distribution Box Page | 17
www.homegridenergy.com 1350 Wigwam Parkway, Henderson, NV 89074 info@homegridenergy.
