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Friday, September 11

Solar made 102 kWh, 10% less than Thursday, and 77% of what the house used came from solar and the battery.

Closed day
chevron_leftFri, Sep 11chevron_right
Today
  1. Tue8
  2. Wed9
  3. Thu10
  4. Fri11
  5. Sat12
  6. Sun13
  7. Mon14
Produced102kWhForecast 84.1 kWh, likely 55–109 kWh
Used93.3kWharrow_downward35% vs Thursday
Net from grid8.6kWh21.1 kWh in, 12.5 kWh out
Peak17.7kWat 12:30 PM

Power · kW

  • Solar
  • House
  • Expected
0510152012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM12 AM

Appliances · running

  • A/C
  • Pool
12 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM12 AMPool pumpA/C · masterA/C · hallwayA/C · garage

House use by source · kW

  • Solar
  • Battery
  • Grid
  • To grid
−20−1001012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM12 AMHouse useSurplus solar

Energy balance · kWh

House used93.6 kWh
  • Solar 47.5 kWh(51%)
  • Battery 25.4 kWh(27%)
  • Grid 20.7 kWh(22%)
Solar made102 kWh
  • House 47.5 kWh(47%)
  • Battery 42.8 kWh(42%)
  • Grid 11.7 kWh(11%)

Weather

High 96°F, average 81°F · sunlight 4.4 kWh/m² · rain 0.15 in · gusts to 9 mph · humidity 85% · 301 lightning strikes nearby.

chevron_rightWhere these numbers come from

Day totals come from the battery system's lifetime counters, read once the day closes. Until then, or when that row is missing, they're added up from the 15-minute readings instead. Self-powered is the share of house use that didn't come from the grid: 1 − grid_import_kwh ÷ home_kwh. The forecast on Produced is the one fetched before the day began, scored by the forecast model fitted without this day (Now explains the model). The dashed Expected line spreads it over the day the way the array's day usually builds up: at each quarter hour, the median share of a day's total made by then over the 14 closed days before this one.

House use by source splits each 15-minute reading: solar goes to the house first, then charges the battery, then goes to the grid; the house's remaining use comes from the battery, then the grid. The energy balance adds those splits up, so charging and discharging aren't netted against each other. It uses the 15-minute readings, so it can differ by a few kWh from the meter counters in the tiles; 1.6 kWh moved between the battery and the grid directly and isn't in either bar.

Appliance activity comes from the thermostats, pool controller through Home Assistant, polled about every 10 minutes; a bar means the appliance was running at a poll.

Weather is from the Tempest station next to the house, 144 readings this day. Sunlight is the average irradiance × 24 h (AVG(solar_radiation_w_m2) × 24 ÷ 1000).