Battery Storage


Battery Storage allows households to control when they use electricity. This control enables them to utilise more of the electricity generated by their solar system and/or to reduce electricity use when the rate is high.


Battery Storage a large step closer

Only a small percentage of households receive a financial benefit from the installation of a 5kW solar system and 13.5kWh battery storage system. This situation is due to change rapidly. If current system price reductions continue then over 50% of households will benefit after installing the same system in only 3 to 6 years.

Effect on Annual Cost 250 x 250

Comparing solar with battery storage to solar only

Households considering the installation of a solar system may be offered the option of adding battery storage. The analysis compares the total cost of solar only against solar with battery storage. It finds the additional cost of battery storage is probably not justified.

Battery Degradation 250 x 250

Years to recover cost of battery storage

Battery storage systems are currently expensive and have a limited usable lifetime. When usable battery capacity is included in the financial returns is becomes clear households never recover the (current) cost of battery storage systems.

Arbitrage ROI 250 x 250

Economics of using battery storage on a time of use tariff without solar

Households on a time of use tariff can use battery storage systems to reduce the amount of electricity they purchase during peak periods. Using consumption data from 8000 households this article concludes on current prices households will make a financial loss.

System Cost 250x250

Sensitivity Analysis of economics of adding battery storage

Analysis is performed to reveal the sensitivity of the Return on Investment households receive when choosing to invest in a battery storage system in addition to their existing solar system.

ROI 250x250

Economics of adding Battery Storage to an existing Solar System

Analysis of actual measurements from 300 Sydney households reveals none of the households recover the cost of installing a battery storage system to their existing solar system. In fact on average households will make an annual loss of 7.7% on the cost of the system.


Adding Battery Storage to Solar Systems

Adding Battery Storage to a Solar System allows households to control when they use the electricity generated by their solar system. This introduction considers the components of a battery storage system and the resulting energy flows.