diff --git a/webgui/charge_tracker.go b/webgui/charge_tracker.go
deleted file mode 100644
index 82cfbcb..0000000
--- a/webgui/charge_tracker.go
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
-Copyright (c) 2015, Hendrik van Wyk
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-* Redistributions of source code must retain the above copyright notice, this
-list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright notice,
-this list of conditions and the following disclaimer in the documentation
-and/or other materials provided with the distribution.
-
-* Neither the name of invertergui nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-package webgui
-
-import (
-	"time"
-)
-
-type ChargeTracker struct {
-	fullLevel    float64
-	currentLevel float64
-	lastUpdate   time.Time
-}
-
-// Creates a new charge tracker. fullLevel is in A h.
-func NewChargeTracker(fullLevel float64) *ChargeTracker {
-	return &ChargeTracker{
-		fullLevel:    fullLevel,
-		currentLevel: fullLevel, // Have to start somewhere.
-		lastUpdate:   time.Now(),
-	}
-}
-
-func (c *ChargeTracker) Update(amp float64, timestamp time.Time) {
-	newNow := timestamp
-	elapsed := newNow.Sub(c.lastUpdate).Hours()
-	c.lastUpdate = newNow
-	c.currentLevel -= elapsed * amp
-}
-
-func (c *ChargeTracker) CurrentLevel() float64 {
-	return c.currentLevel
-}
-
-func (c *ChargeTracker) Reset() {
-	c.currentLevel = c.fullLevel
-}