Design a single-line diagram for a residential/commercial solar-plus-storage system under UK G99/G100 grid codes, featuring an SMA Sunny Tripower 15kW inverter, battery storage, and demand response capability.
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Used IEC graphical symbols for a 3-phase 400V system.
Placed a G100 export limitation relay between the meter and the main busbar to curtail export when required.
Added a controlled demand response load to absorb excess generation.
Modeled the PV and battery inverters as separate sources with individual circuit breakers.
When designing or documenting a grid-connected solar and battery system that must comply with UK Engineering Recommendation G99 (generation connection) and G100 (export limitation), especially with demand response integration.