Net metering scheme mandates the distribution utility (DU) to credit the net energy exported by the on-grid solar power system in the roof during low demand (day time). Net energy only arises when the solar power generation system generates more electricity than the household consumes. When we say credit, this means monetary i.e. Peso equivalent of the energy exported into the grid. The rate of credit is equivalent to generation charges of the distribution utility. So if the DU generation charge is Php6 per kW-hr, that will be the credit rate for every kW-hr exported to the grid. Sounds fair?
Not so. Not so because if instead of exporting the excess energy the household uses/consumes it, then the monetary value should be equal to the power rate per kW-hr by the DU. The average power rate is around Php10 per kW-h. This means that for every kW-hr exported to the grid, the system owner loses Php4 or whatever the difference of the generation charge and power rate.
It is advisable for home owners to consult with system providers like EastGreenfields the proper size of the on-grid system that will optimize the cost of the system. Only if the full generated energy is used 100% by the home owner the system gives its full value and fast ROI. But if the system exports too much of it's excess energy then the ROI takes longer time to recover.
Enter the small scale grid storage options...
What if using the excess energy is use to charge the batteries for use at night (lights and to power not so heavy loads like desk top or lap tops and LED TV sets for 4 hours) rather than exporting it.
EastGreenfields will be introducing the home base on-grid storage in 2016 and we are very excited. We will be testing the pilot project in Q1 of 2016, and we will introduce to the market after our own testing and adjustments.
We will be introducing 500 watts to 2000 watts on-grid battery storage system.
Watch us out!
