Guides
Plain English answers on grid connections, tariffs, and behind the meter solar and storage.
Load factor: what your site's demand shape tells you
Load factor is average demand divided by peak demand. What a site's load factor shows about its demand shape, and why a peaky site suits battery storage.
Rooftop solar: splitting value between landlord and tenant
A landlord and tenant can split rooftop solar value through a roof lease, an on-site PPA or a private wire. Which one fits depends on who uses the power.
Solar self-consumption on a commercial site
Solar self-consumption is the share of a site's generation used on site rather than exported. How it is worked out from half-hourly data and what moves it.
How to read a commercial electricity bill
A commercial electricity bill has far more than a unit rate: standing charges, capacity charges, network and policy costs, and VAT. Every line, decoded.
Solar export limits on commercial sites
A solar export limit caps how much power a site can send to the grid. What an export limit is, why network operators set one, and how it affects returns.
Does commercial solar and battery pay back?
Solar and battery storage can pay back on a commercial site, but the payback period depends on demand, tariff and capital cost. How the sum is worked out.
How to read half-hourly electricity data
Half-hourly electricity data is a year of meter readings taken every 30 minutes. What the 17,520 numbers show about a site's demand, and how to read them.
TNUoS charges explained
TNUoS charges cover a large site's use of the national transmission network, from a fixed capacity band to a demand element that a battery can cut down.
What are DUoS charges?
DUoS charges are what a site pays to use the local distribution network, split into red, amber and green time bands. What they mean, and how to read them.
What is maximum import capacity?
Maximum import capacity is the ceiling on power a site can draw from the grid. What MIC means, how it is charged, and what happens when a site exceeds it.