GM Energy V2H Bundle Installation Manual 80
APPENDIX A: PRODUCT DATASHEETS
Please refer to GM Energy website for product data sheets at https://gmenergy.gm.com/for-home/resources-and-support
APPENDIX B: DESIGN GUIDELINES
o
Determine Charger breaker size:
•
If available, use Green Button data/usage data to size Charger breaker as large as possible without triggering a main
panel upgrade (MPU).
•
Otherwise, perform traditional NEC load calculations and determine largest breaker possible without triggering MPU.
o
Show DIP switch setting on installation notes corresponding with selected size (see Section 4.2).
o
Minimum practical Charger breaker size = 40 A.
o
Determine loads being backed up:
•
Prioritize single-pole circuits, lighting, and plugs.
•
No individual load greater than 40 A (based on Inverter rating).
▪
No individual load with an LRA (Locked Rotor Amperage) than 62 A.
o
Soft starters may be installed to reduce startup current of inductive loads (such as air conditioner) although
performance is not guaranteed.
•
Follow guidance for interior located subpanels having potentially disqualifying loads:
▪
If they can be easily routed out via exterior (such as an AC unit with an exterior disconnect), add notes to enable
inclusion in scope of work.
▪
Otherwise, subpanel is disqualified for backup.
o
Add load calculations to PVE-2:
•
If using traditional load calculation, include:
▪
Whole-home load calculation.
▪
Hub load calculation.
•
If using green button data/usage data, only include that calculation justifying Charger breaker size, and Hub load
calculation.
o
Choose appropriate Hub interconnection method based on existing panel limitations, and load calculation of circuits being
relocated:
•
Branch breaker
•
Lug kit
•
Hub as Main Service Entrance
▪
May require using non-backup panel, limited to 110 A.
•
Use appropriate resources to determine max. branch breaker/lug kit compatibility.
•
NEC 705 rules apply: 120% rule, sum of breakers, or PCS to protect MSP busbar.
▪
Prioritize using PCS whenever possible and avoid relocating non-backup loads out of MSP.
o
Hub backup panel limited to 200 A total (125 A max. branch breaker).
•
Must use Eaton BR or BQ type breakers.
•
Backup panel in Hub contains 12 single pole breaker spots. One dual pole 60A breaker is pre-installed for Inverter.
•
The pre-installed 60A breaker in the Hub must be used for the Inverter. Do not replace this breaker unless replacing
with a breaker of the same or similar model.
•
Ensure no single load exceeds 40A continuous rated current. Loads that cannot be powered by Inverter during an
outage should be landed on a non-backup panel.
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