Your first electricity bill after going solar can look confusing, mainly because it introduces terms that a pre-solar bill never used. Understanding these four terms precisely is the difference between reading your bill with confidence and feeling like something doesn't add up.
Production is the total electricity your solar panels generated during the billing period, full stop — regardless of whether your home used that electricity, exported it, or anything else. It's a measure of what your system did, not what you paid or saved.
Consumption is the total electricity your household actually used during the billing period, from any source — solar or grid. This number reflects your household's real energy usage pattern and doesn't change just because you installed solar; what changes is where that consumption is sourced from.
Export is the portion of your production that exceeded your real-time consumption at the moment it was generated, and was therefore sent out to the grid rather than used inside your home. This typically happens during bright midday hours if your household's consumption is lower than your generation at that exact moment — for example, if everyone is at work or school.
Import is the electricity your home drew from the grid because your solar generation wasn't sufficient to cover consumption at that moment — typically at night, early morning, or during heavily overcast periods.
Here's a worked example to make this concrete. Suppose in a given month your system produced 400 units of solar electricity. Your household consumed a total of 380 units across the month. Of your 400 units produced, your home directly used 350 units the instant they were generated, and the remaining 50 units were exported to the grid during periods of low household usage. Meanwhile, because your total consumption (380 units) exceeded what was covered by direct solar use (350 units), you needed an additional 30 units from the grid during low-generation hours — this is your import.
Your net bill is calculated on import minus export: 30 units imported minus 50 units exported means you actually finish the month in credit by 20 units, which typically carries forward to reduce your next bill. Notice that this net calculation has nothing to do with your total production (400) or total consumption (380) directly — it's specifically the import-versus-export relationship that determines what you pay.
Once you understand this distinction, an unusually high bill in a particular month becomes something you can actually investigate — was it a run of cloudy days reducing production, a spike in evening consumption when solar wasn't available, or a genuine metering discrepancy worth raising with your DISCOM — rather than a mystery number you simply have to accept.
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