Your solar system came with an app, and the first time you open it, it can look like an aircraft cockpit: graphs, arrows, numbers moving in real time. The good news is that only a handful of those numbers really matter, and once you know them, the app answers three questions at a glance: is the system producing, is it saving you money, and is anything going wrong. Here is how to read it.
kW and kWh, the one that trips everyone up
Start here, because almost every confusion comes from these two. A kilowatt (kW) is a rate, how fast you are making or using power right now. A kilowatt-hour (kWh) is a total, how much energy added up over time. Think speed versus distance: 3 kW is how fast the panels are working this second, and the kWh is how far they have travelled by the end of the day. Your JPS bill is in kWh, so that is the number that turns into money. You can read the distinction under kilowatt-hour.
The four numbers that matter
Most apps show four figures that, together, tell the whole story. Production is what your panels made. Consumption is what your home used. Export is the surplus you sent to the grid. Import is what you pulled from the grid when your panels were not keeping up. Glance at those and you know how much of your own power you used, and how much you bought or sold.
If you have a battery
With storage, two more numbers appear. State of charge is how full the battery is, shown as a percentage, which is really your backup reserve at a glance. And the app will show whether the battery is charging or discharging at that moment, so you can see it filling up in the sun and carrying the house in the evening.
The number that actually means money
Here is the insight most people miss. Many apps show how much of your usage your own solar covered, sometimes called self-consumption or solar offset. That figure matters more than a big export number, because in Jamaica the power you export earns only the low avoided-cost credit, while the power you use yourself saves the full retail rate. We explain why in how JPS net billing actually works. So your best day is the one where you used the most of your own production, not the one where you sent the most to the grid.
Live data versus history
The live screen, with power flowing in real time, is the fun part, but the history is where the value sits. The daily, monthly and yearly graphs show your patterns, how production rises and falls with the seasons, and, most usefully, whether output is slowly drifting down over time.
Use it as an early warning
That trend is the single most useful habit. A steady, unexplained drop in production usually means something simple: dirt or a film on the panels, new shade from a growing tree, or a fault. The app tells you before your electricity bill does, the point we make in cleaning and maintaining solar panels in Jamaica. A quick monthly glance is all it takes to catch a problem early.
When to call someone
If production suddenly drops to zero, if the app shows an error or alert, or if output keeps declining and a gentle clean does not bring it back, it is worth having the system checked. Those are signs of a fault rather than a dirty panel, and the app has done its job by flagging them.
Related reading
- How JPS net billing actually works for why self-use beats export.
- Cleaning and maintaining solar panels in Jamaica for what a falling production trend often means.
- What an inverter actually does in a solar system for the device the app is reading.
- Solar installation for a system set up with proper monitoring.
What is the difference between kW and kWh on my solar app?
A kilowatt (kW) is a rate, how fast you are making or using power right now. A kilowatt-hour (kWh) is a total, how much energy added up over time. Think speed versus distance. Your JPS bill is measured in kWh, so that is the figure that turns into money, while the live kW reading is just the moment.
What are the main numbers to watch?
Four: production (what your panels made), consumption (what your home used), export (surplus sent to the grid), and import (what you drew from the grid). Together they tell you how much of your own power you used and how much you bought or sold. If you have a battery, add its state of charge, which is your backup reserve.
Why does self-consumption matter more than export?
Because in Jamaica exported power earns only the low avoided-cost credit, while power you use yourself saves the full retail rate. So a high self-consumption or solar offset figure is worth more than a big export number. A good day is one where you used the most of your own production, not one where you sent the most to the grid.
What does battery state of charge mean?
It is how full your battery is, shown as a percentage, which is really your backup reserve at a glance. The app will also show whether the battery is charging or discharging, so you can watch it fill in the sun during the day and carry your home in the evening or through an outage.
How do I use the app to catch problems?
Watch the production trend over weeks and months, not just the live screen. A steady, unexplained drop usually means dirt on the panels, new shade, or a fault. The app shows it before your bill does, so a quick monthly glance at the history lets you catch and fix issues early.
When should I call someone about what the app shows?
If production suddenly drops to zero, if the app shows an error or alert, or if output keeps declining and a gentle clean does not restore it. Those point to a fault rather than dirty panels. At that stage the app has done its job by flagging it, and it is worth having the system checked.
The next step
Your monitoring app is the dashboard for an investment worth thousands; a few minutes learning it pays off. Get a free quote or message us if your numbers look off or your production has slipped, and we will check the system for you.