Export limitation

Export limitation caps the active power that the generators feed into the grid at the point of connection. Network operators often impose such a cap to meet grid code requirements. A meter at the grid connection measures export. When available PV power is greater than the site load, the inverter reduces its output and the excess power is lost. A sudden change in load can still cause brief overshoot above the limit, but the control limits how long it lasts. Fail-safe fallback settings keep export within the limit when parts of the system fail. On SMA CORE2 and Sunny Tripower X, you configure the meter channels and then set the active power to closed loop control with manual signal source. The active power setpoint is a percentage of total system power, where 0% gives zero export. Setting time and active power gradient adjust how fast the limit is reached. Enphase IQ8 Commercial systems set the power export limit through the grid profile. The settings are a watt threshold, enable or disable, per-phase or aggregate limit, export response time, and communication loss time. If export stays above the limit for longer than the response time, the Enphase gateway ramps PV down to zero. On Generac PWRcell inverters, an Export Limit of 0 works as zero export. Export Limiting can be set only once and the value can only be decreased. If the inverter loses communication with its CTs, it ramps its output down until export stops. Solis S6 hybrids can enable export power control with or without a battery, using the energy meter supplied with the inverter. Fronius Datamanager, SMA Sunny Tripower Smart Energy and FIMER inverters with a meter also provide this function.

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• sentence 2: support check: partial - Inverter reduces output with excess lost is stated, but a meter specifically at the grid connection measuring export is not explicitly stated (Solis meter measures consumed and imported; FIMER says meter at Point of Connection only implicitly).
• sentence 3: support check: partial - Overshoot on sudden load change with time constrained is stated; fail-safe is only defined as capability to satisfy the limit in failure scenarios, and the fallback settings figure has no content.
• sentence 8: support check: partial - Solis and FIMER are supported, SMA Sunny Tripower Smart Energy lists zero export as a function; Fronius Datamanager passage shows only a table of contents with no export function. -->