Distributed export limitation for large sites & solar farms

On a compact site, export limitation is one measurement, one controller, one cable. Scale up — a solar farm, a multi-building campus, generation spread across feeders — and the simple version stops working: the control point is hundreds of metres from the inverters, the inverters sit in groups that behave differently, and the naive answer becomes a scheme that dumps the whole site offline because one number twitched.

A distributed scheme treats the site the way it's actually built: export measured where the DNO cares about it — the point of supply — and control reaching out to each inverter group or generation asset individually, managing them together as a single scheme against a single agreed limit.

That's what the ENICO G100 Controller does at scale: curtailment shared across groups so the site gives up the least valuable generation first, instead of isolating everything to protect one number.

G100/2 doesn't force sophistication: a simple scheme that disconnects generation to protect the limit is fully compliant, and on a small site it's often the right answer. At scale the economics flip — every unnecessary trip is lost yield across the whole farm.

So the distributed scheme works the other way: generation is ramped, trimmed and rebalanced across the site's groups, holding export inside the Agreed Export Capacity while giving up the least valuable output first. Disconnection remains the fail-safe, not the strategy.

Distance is a communications problem, and communications fail — so the scheme is engineered around that certainty. Wired or wireless links to remote inverter groups, chosen for the site's geography; and on any loss of communication, measurement or power, the affected generation defaults to a safe state. The limit holds because failure itself is a designed-for condition, exactly as EREC G100 demands.

The credential doesn't dilute as the site grows: the scheme remains fully type-tested and register-listed, the documentation still lands as one pack — scheme description, settings schedule, Appendix C carrying the register reference — and the DNO still gets one scheme to accept, however many control points sit behind it.