Technology11 min read
Anti-islanding detection methods for grid-tied inverters
A technical walkthrough of passive and active anti-islanding methods, why the non-detection zone matters, and how installers verify compliance during commissioning.
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Long-form reporting on solar hardware, installation, economics, storage and policy.
Economics10 min read
Discount rates and NPV for solar projects
How to choose a discount rate and build a defensible net present value model for a rooftop or ground-mount PV investment.
Economics9 min read
Electricity tariff structures and time of use
How flat, time-of-use and dynamic tariffs change the value of self-consumed and exported solar electricity, with a worked comparison.
Policy & Grid11 min read
Export limitation and active power control for PV systems
How export limits are enforced technically, from simple fixed caps to dynamic zero-export control loops, and what to check when a limiter is not behaving as expected.
Economics9 min read
Financing solar: loans versus cash purchase
How to compare a cash purchase against a solar loan on a like-for-like basis, including the effect of interest rates on payback and NPV.
Policy & Grid11 min read
Grid codes and inverter protection settings explained
How grid codes translate into the voltage, frequency and trip-time parameters programmed into a PV inverter, and why getting them wrong causes rejected commissioning.