Overcoming Barriers To 100% Clean Energy For Hawaii Starts At The Bottom Of The Energy Food Chain With Residential Island Nano-Grid And Everyday Lifestyle Behavioral Changes

Residential rooftop solar-PV market on Oahu has dropped by 84% since peaking in 2013 because the new policies/programs have created economic barriers to sustain growth and continued deployment. To realize the best economic savings we have been operating in the no export island nano-grid mode with Zero Grid-Buy. Grid-buy is used for back-up to charge the multi-storage electrical and thermal storage batteries/devices on rainy/cloudy days. We also learned to be energy conservation minded for everyday lifestyle behavioral changes required to sustain 100% renewable energy. But in order to achieve this we had to identify the top 7 energy demand household appliances and adjust their time-of-use to match the maximize PV generation time of day. We therefore reduced the average daily grid-buy from 48kWh/day to 0.3kWh/day and realized a yearly savings of $4,201/year (88.4%) for an ROI of 3.2 years and elimination of the utility Duck Curve. Our calculations show that with CGS+ the savings would be 34-44%, Smart Export 31-46% and CSS 83-96%.