History
Sensa keeps an hourly summary of every reading in your van, so you can look back over a season rather than over this afternoon. The History tab on the Habitation dashboard is where you read it. It appears while Nerd Mode is on, and only if your van has something worth charting.
Nothing here is stored anywhere but your own system, and nothing is sent to us.
The minute-by-minute detail behind a graph is kept for seven days and then thrown away. What survives is the hourly summary: the average, the lowest and the highest for each hour. So a graph of the last day is fine grained, and a graph of last winter shows the shape rather than the moment.
Energy
How many kilowatt hours you have used and where they came from, as bars across the period you choose: 24 h, 7 d, 30 d or 12 m. Tap a bar to read that hour, day or month.
One thing at a time, chosen with the buttons above the chart:
- Consumption, everything the van drew, mains and 12 volt together.
- Battery, charged above the line and discharged below it, so you can see a day's cycle at a glance.
- Solar, what your panels made.
- Shore, what came in from a hook-up.
- Alternator, what the engine put back while you drove.
You only get the buttons your van can answer. No alternator sensor, no Alternator button.
Most equipment reports power, what is flowing right now, rather than energy, how much has flowed. Sensa adds it up for you as it goes, so these totals build from the day the tab first appears rather than reaching back over history you had before it.
Battery health
What your leisure battery has actually been through, over 7 d, 30 d or 12 m. Each day is a floating bar running from that day's lowest state of charge to its highest, so a row of short bars near the top is a battery that has had an easy time, and long bars dropping low is one working hard.
Above the chart:
- Deepest, the lowest charge it reached in the period, and when.
- Average low, how low it typically gets, which is the number that matters for how long the battery will last.
- Voltage, the lowest and highest it saw, if your battery monitor reports voltage.
- Cycles, only if the battery counts its own cycles. We do not estimate it: a guessed figure that looks precise is worse than no figure.
Graphs
One reading at a time, drawn as a line with a shaded band around it showing how much it moved inside each period. Pick the reading and the range with the buttons: 24 h, 7 d, 30 d or 1 y.
What you can pick depends on what you have fitted, from battery charge, voltage and power through solar, mains and 12 volt load, shore power and alternator.