TY - NEWS
TI - Making the case for time-of-use electric rates to boost the value of battery storage in commercial buildings with grid connected PV systems
AU - Sepúlveda, Sergio
AU - Hegedus, Steven S.
AB - We performed a techno-economic analysis of behind-the-meter photovoltaics (PV) coupled
with lithium-ion battery storage under a flat rate and a time-of-use (TOU) rate for commercial
buildings using HOMER Grid software. Unique contributions from this work include
determining the impact that the battery degradation limit has on the cost-effectiveness of the
system, and demonstrating the impact of tariff rates using high-resolution real load data of
commercial buildings with different energy usage during a project lifetime of 25 years. From the
results, we found that delaying the replacement of the battery has a substantial economic benefit
for the system owner. Letting the battery degrade to 50 % of initial capacity is comparable to a
30 % reduction in the battery capital cost during the lifetime of the project because the battery
will be replaced only once instead of twice lowering the Net Present Cost. The ability of a given
building to benefit from solar-plus-storage depends on the degradation limit and tariff structure,
but it does not depend strongly on the load pattern and size. We conclude that TOU tariffs would
promote more rapid cost-effective adoption of PV systems with batteries in commercial
buildings in the upcoming years
DA - 2021-03-01
KW - Battery degradation limit
KW - Battery Energy Storage System
KW - Energy arbitrage
KW - HOMER Grid
KW - peak shaving
KW - techno-economic analysis
PB - Energy
UR - https://repositorio.ufps.edu.co/handle/ufps/1795
ER -