Sun-Day Simulator
A 24-hour view of solar output, household use and battery charge. The bar along the top of the page shows the battery level through the day.
Your system
Illustrative hourly model: battery keeps a 10% reserve and loses about 5% when charging. Values are estimates, not a quote. Settings are saved only in this browser.
Hour by hour
Solar (kW)Household use (kW)Battery level (right axis)
0%of surplus stored
0%of 17:00–22:00 peak covered
0%of solar used at home
0 kWhimported from grid
Peak Shift planner
Choose a load, then drop it on an hour (drag it, or select it and press an hour button). The chart above updates, and the coverage bar shows how much of your plan runs on sun or battery instead of the grid. Hours marked ☀ have strong sun. Your plan is saved in this browser.
On a phone, tap a load, then tap an hour. On a computer, drag a load onto an hour.
0 kWhenergy in your plan
–runs on sun or battery
0 kWhstill bought from grid
Estimate from the illustrative model.