1. Photovoltaic Systems Engineering Session 18 Solar+Storage Systems
SEC598F18
Photovoltaic Systems Engineering
Session 18
Solar+Storage Systems
Grid-tied Systems, part 3
November 05, 2018

2. Session 18 content Grid-Tied Battery-Enhanced Systems
Battery Applications
Required programming

3. Integration of Battery Storage with PV Systems
Four Potential Beneficial (Behind-the-Meter) Applications
Backup Power
PV Self-Consumption
Time of Use
Demand Reduction

4. Integration of Battery Storage with PV Systems
Backup Power (Krause and Brearley)
The role of energy storage is to support loads in the event of a grid failure
There is a subpanel that connects a subset of the home’s branch circuits and it can operate as long as the battery remains above the allowable DoD
It’s an “early adopter” market driven more by customer desire than by economics – the value proposition is hard to justify

5. Integration of Battery Storage with PV Systems
PV Self-Consumption (Krause and Brearley)
The role of energy storage in this case is to store excess PV production and discharge later – perhaps for the zero-export scenario
Addition energy monitoring is required – PV curtailment is necessary at times in the zero-export situation
It might be justifiable in markets where there is no NEM policy in place

6. Integration of Battery Storage with PV Systems
Time of Use (Krause and Brearley)
The role of energy storage in this case is similar to the self-consumption scenario - to store excess PV production and discharge later
But the goal could be called “energy arbitrage”
Store the excess energy when its value is low (off-peak) and discharge when its value is high (on-peak)

7. Integration of Battery Storage with PV Systems
Demand Reduction (Krause and Brearley)
The role of energy storage in this case is to reduce instantaneous power demand
Nearly all non-residential customers have mandatory demand charges, and nearly all residential customers can choose optional demand charges – but they can be extremely high
Discharging batteries to reduce the demand charges – so-called “peak shaving” – can have a very high value proposition

8. Battery Enhanced Systems

9. Battery Enhanced Systems

10. Battery Enhanced Systems
Peak Shaving

11. Battery Enhanced Systems
Time of Use

12. Battery Enhanced Systems

13. Battery Enhanced Systems

14. Battery Enhanced Systems

15. Battery Enhanced Systems

16. Battery Enhanced Systems

17. Battery Enhanced Systems

18. Battery Enhanced Systems

19. Manufacturers Integrated LMS Systems Enphase AC Battery System
JLM - Phazr
SolarEdge - StorEdge
SMA – Sunny Boy Storage
Pika - Energy Island

20. Manufacturers Self-Contained Systems Blue Planet Energy – Blue Ion
Sonnen Batterie
Tesla Energy – Powerwall 2