There are various grid feed-in restrictions and requirements from local utility companies across the globe, making it challenging for solar PV installers to adhere to these varying regulations. Here are 3 ways you can meet local requirements, minimize loss and still maximize return on your solar investment.
1. Power Curtailment – Controlling Inverter Output, Limit Grid Feed-in
Solar-Log® measures building power usage with an integrated consumption meter and then adjusts inverter output to ensure that grid feed-in (the difference between the current production and usage) does not exceed the maximum amount defined. On days with limited sunshine or on days with an abundance of sunshine, Solar-Log® is capable of controlling inverter AC output to a certain percentage of total inverter capacity or to a set kW amount. In extreme cases or in places where plant owners are charged for power sent to the grid, Solar-Log® controls the inverters to produce just enough power to cover the building usage. We call this case zero grid-export.
2. Optimized Self-Consumption – Making use of self-produced power onsite
Instead of shedding PV yield, power can first be directed towards self-consumption. By monitoring building usage, the Solar-Log® calculates the current power surplus and can turn appliances on/off via networked smart plugs taking advantage of peak solar hours and maximizing the amount of self-produced power consumed onsite.
3. Integrated Storage Systems – Storing excess power for future use
Instead of shedding PV power (as outlined in #1), power can be stored in batteries. Plant owners can maximize power production and make use of stored power onsite. Solar-Log’s increasing list of compatible batteries includes Fronius, Kyocera, Phonosolar, Sonnen, and Varta. Battery state-of-charge and energy flow can be monitored within the Solar-Log® WEB portal. If feed-in is limited to a specific kW amount, plant owners can still maximize on incentives by feeding-in stored power at varying times during the day.
These innovative solutions allow installers to put up larger solar PV plants in areas where they otherwise would not be possible. It allows end users to take advantage of the self-produced power and maximize plant return. These solutions minimize the amount of grid consumed power and assist with a more reliable, stable grid.
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