From 9d43e1802be630cf5338e5e97adda036e87c16b0 Mon Sep 17 00:00:00 2001 From: Michiel Berger Date: Thu, 30 Apr 2026 21:57:11 +0200 Subject: [PATCH] Clarify what 'surplus' means in the leaderboard MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The number was previously labelled 'total solar surplus' which read like 'total PV produced'. It's actually 'capturable surplus' = the kWh that would be exported to the grid without a battery, which is less than gross PV by the directly-self-consumed portion (PV used at the same hour it's produced never crosses the meter). For dad's 3 kWp setup: PV produced ≈ 2625 kWh, directly consumed ≈ 750 kWh, exported ≈ 1869 kWh. The battery can only redirect the 1869, because the 750 doesn't cross the meter. Renamed heading + extended legend with the explanation. --- src/pluginbattery/templates/index.html | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/src/pluginbattery/templates/index.html b/src/pluginbattery/templates/index.html index 63ce731..21ae52b 100644 --- a/src/pluginbattery/templates/index.html +++ b/src/pluginbattery/templates/index.html @@ -4,7 +4,7 @@ Honest battery payback — vs thuisbatterijgids.nl - + @@ -86,7 +86,7 @@

Full leaderboard - ({{ initial.batteries|length }} batteries · {{ initial.elapsed_seconds }}s · total solar surplus: {{ '%.0f' % initial.total_surplus_kwh }} kWh/yr) + ({{ initial.batteries|length }} batteries · {{ initial.elapsed_seconds }}s · capturable surplus (= grid exports without a battery): {{ '%.0f' % initial.total_surplus_kwh }} kWh/yr)

@@ -134,8 +134,8 @@
LP €/yr
Honest year-1 savings from our linear-program oracle (perfect 24h foresight).
LP yr
Years until cumulative savings (with the chosen inflation rate) recoup the battery cost.
10-yr net
Total profit over 10 years: cumulative savings (compounded by inflation) minus the battery cost. Red = doesn't break even within 10 yr.
-
kWh capt
kWh of available solar surplus the battery actually absorbed over the year.
-
% capt
That, as a percentage of the scenario's total surplus (shown in the heading).
+
kWh capt
kWh of capturable surplus (i.e. of grid exports that would happen without a battery) that this battery absorbs.
+
% capt
That, as a percentage of the scenario's capturable surplus shown in the heading. Note: the denominator is exports, not gross PV — solar that's directly self-consumed during sunny hours never crosses the meter and is invisible to a battery.
% full
Of all surplus hours, the % when the battery was already full and couldn't store more — capacity-bottlenecked.
% sat
Of all surplus hours, the % when charging was pegged at max kW and couldn't keep up — power-bottlenecked.
@@ -152,6 +152,6 @@

- +