diff --git a/etc/init.d/inverter b/etc/init.d/inverter
index d85007c..5e65610 100644
--- a/etc/init.d/inverter
+++ b/etc/init.d/inverter
@@ -1,20 +1,156 @@
-#!/bin/sh
+#! /bin/sh
 ### BEGIN INIT INFO
-# Provides: inverter
-# Required-Start: $network
-# Required-Stop: $network
-# Default-Start: 2 3 5
-# Description: 
+# Provides:          inverter.php
+# Required-Start:    $network
+# Required-Stop:     $network
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: 
+# Description:       This file should be used to construct scripts to be
+#                    placed in /etc/init.d.
 ### END INIT INFO
 
+# Author:  <>
+# 
+
+# Do NOT "set -e"
+
+# PATH should only include /usr/* if it runs after the mountnfs.sh script
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+DESC=""
+NAME=inverter.php
+DAEMON=/opt/inverter/inverter.php
+DAEMON_ARGS=""
+PIDFILE=/var/run/inverter/inverter.pid
+SCRIPTNAME=/etc/init.d/inverter.php
+
+# Exit if the package is not installed
+[ -x "$DAEMON" ] || exit 0
+
+# Read configuration variable file if it is present
+[ -r /etc/default/${NAME} ] && . /etc/default/${NAME}
+
+# Load the VERBOSE setting and other rcS variables
+. /lib/init/vars.sh
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
+. /lib/lsb/init-functions
+
+#
+# Function that starts the daemon/service
+#
+do_start()
+{
+	# Return
+	#   0 if daemon has been started
+	#   1 if daemon was already running
+	#   2 if daemon could not be started
+	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
+		|| return 1
+	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
+		$DAEMON_ARGS \
+		|| return 2
+	# Add code here, if necessary, that waits for the process to be ready
+	# to handle requests from services started subsequently which depend
+	# on this one.  As a last resort, sleep for some time.
+}
+
+#
+# Function that stops the daemon/service
+#
+do_stop()
+{
+	# Return
+	#   0 if daemon has been stopped
+	#   1 if daemon was already stopped
+	#   2 if daemon could not be stopped
+	#   other if a failure occurred
+	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE
+	RETVAL="$?"
+	[ "$RETVAL" = 2 ] && return 2
+	# Wait for children to finish too if this is a daemon that forks
+	# and if the daemon is only ever run from this initscript.
+	# If the above conditions are not satisfied then add some other code
+	# that waits for the process to drop all resources that could be
+	# needed by services started subsequently.  A last resort is to
+	# sleep for some time.
+	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
+	[ "$?" = 2 ] && return 2
+	# Many daemons don't delete their pidfiles when they exit.
+	rm -f $PIDFILE
+	return "$RETVAL"
+}
+
+#
+# Function that sends a SIGHUP to the daemon/service
+#
+do_reload() {
+	#
+	# If the daemon can reload its configuration without
+	# restarting (for example, when it is sent a SIGHUP),
+	# then implement that here.
+	#
+	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE
+	return 0
+}
+
 case "$1" in
-'start')
-	/opt/inverter/start.sh
+  start)
+	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
+	do_start
+	case "$?" in
+		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+	esac
 	;;
-'stop')
+  stop)
+	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
+	do_stop
+	case "$?" in
+		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+	esac
 	;;
-*)
-	echo "Usage: $0 { start | stop }"
+  #reload|force-reload)
+	#
+	# If do_reload() is not implemented then leave this commented out
+	# and leave 'force-reload' as an alias for 'restart'.
+	#
+	#log_daemon_msg "Reloading $DESC" "$NAME"
+	#do_reload
+	#log_end_msg $?
+	#;;
+  status)
+    status_of_proc $DAEMON $NAME -p $PIDFILE
+    ;;
+  restart|force-reload)
+	#
+	# If the "reload" option is implemented then remove the
+	# 'force-reload' alias
+	#
+	log_daemon_msg "Restarting $DESC" "$NAME"
+	do_stop
+	case "$?" in
+	  0|1)
+		do_start
+		case "$?" in
+			0) log_end_msg 0 ;;
+			1) log_end_msg 1 ;; # Old process is still running
+			*) log_end_msg 1 ;; # Failed to start
+		esac
+		;;
+	  *)
+	  	# Failed to stop
+		log_end_msg 1
+		;;
+	esac
+	;;
+  *)
+	#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload|status}" >&2
+	echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2
+	exit 3
 	;;
 esac
-exit 0
+
+:
diff --git a/etc/logrotate.d/inverter b/etc/logrotate.d/inverter
new file mode 100644
index 0000000..ab8e648
--- /dev/null
+++ b/etc/logrotate.d/inverter
@@ -0,0 +1,11 @@
+/var/log/inverter.log {
+   rotate 15
+   compress
+   missingok
+   notifempty
+   sharedscripts
+   size 5M
+   postrotate
+       /bin/kill -HUP `cat /var/run/inverter/inverter.pid 2>/dev/null` 2> /dev/null || true
+   endscript
+}
\ No newline at end of file
diff --git a/opt/inverter/inverter.php b/opt/inverter/inverter.php
index 53ff8f3..de3ad46 100644
--- a/opt/inverter/inverter.php
+++ b/opt/inverter/inverter.php
@@ -1,44 +1,86 @@
 #!/usr/bin/php
 <?php
-$sWake = '7:30';
-$sSleep = '17:30';
-$sTask = '/opt/inverter/inverter.pl > /dev/null';
+require_once 'functions.php';
+require_once 'System/Daemon.php'; // pear install -f System_Daemon
 
-printf("Be awake between %s and %s\n", $sWake, $sSleep);
-$fWake = getHour($sWake);
-$fSleep = getHour($sSleep);
-chdir('/opt/inverter/');
+define('NAME', 'inverter');
+define('TASK', '/opt/inverter/inverter.pl > /dev/null');
+define('CWD', '/opt/inverter/');
+define('MODE', 0755);
+define('FILE_DAEMON_START', 'daemon_start.sh');
+define('FILE_DAEMON_STOP', 'daemon_stop.sh');
+define('DEFAULT_WAKE', '7:00');
+define('DEFAULT_SLEEP', '19:00');
+chdir(CWD);
 
-while (true) {
-    // Check for current need to be awake
+/* Remove previous at entries */
+foreach (explode("\n", trim(command('atq'))) as $sJob) {
+    $sId = substr($sJob, 0, strpos($sJob, "\t"));
+    $sJob = command(sprintf('at -c %s ' . "\n", $sId));
+    $aJob = explode("\n", trim(command(sprintf('at -c %s', $sId))));
+    if (strpos(array_pop($aJob), NAME) !== false) {
+        command(sprintf('atrm %s', $sId));
+    }
+}
+
+/* Inverter daemon */
+System_Daemon::setOptions(array(
+    'appName' => NAME,
+    'appDescription' => '',
+    'authorName' => '',
+    'authorEmail' => ''));
+
+/* Install service */
+if (isset($argv[1]) && $argv[1] == 'install') {
+    System_Daemon::writeAutoRun(); // update-rc.d %s defaults
+
+    /* Write scripts for scheduling with at */
+    if (!file_exists(FILE_DAEMON_START)) {
+        file_put_contents(FILE_DAEMON_START, sprintf("#!/bin/bash\nservice %s start", NAME));
+        chmod(FILE_DAEMON_START, MODE);
+    }
+    if (!file_exists(FILE_DAEMON_STOP)) {
+        file_put_contents(FILE_DAEMON_STOP, sprintf("#!/bin/bash\nservice %s stop", NAME));
+        chmod(FILE_DAEMON_STOP, MODE);
+    }
+    exit;
+}
+
+/* Wake at sunrise, sleep at sunset */
+$aTwilight = getTwilight(date('Y'), date('z'));
+$fWake = getHour($sWake = isset($aTwilight) ? $aTwilight[1] : DEFAULT_WAKE);
+$fSleep = getHour($sSleep = isset($aTwilight) ? $aTwilight[3] : DEFAULT_SLEEP);
+System_Daemon::info(sprintf('Be awake between %s and %s', $sWake, $sSleep));
+
+/* Start deamon */
+System_Daemon::start();
+$bStop = false;
+while (!$bStop && !System_Daemon::isDying()) {
+    /* Check for current need to be awake */
     $fNow = getHour();
     if (!($bAwake = $fNow >= $fWake)) {
-        printf("[%s] Too early to wake!\n", date('r'));
+        System_Daemon::info('Too early to wake!');
     } else if ($bSleep = $fNow >= $fSleep) {
-        printf("[%s] Time to sleep!\n", date('r'));
+        System_Daemon::info('Time to sleep!');
     }
 
     if ($bAwake && !$bSleep) {
-        // Need to be awake now
-        printf("[%s] Running task\n", date('r'));
-        system($sTask);
-        printf("[%s] Task ended\n", date('r'));
+        /* Schedule next sleep time */
+        $sTime = date('H:i', strtotime($sWake));
+        command(sprintf('at -f %s %s 2> /dev/null', FILE_DAEMON_STOP, $sTime));
+
+        /* Execute task */
+        System_Daemon::info('Running task');
+        command(TASK);
+        System_Daemon::info('Task ended');
     } else {
-        // Don't need to be awake now
-        if (!$bAwake) {
-            // Sleep untill wake time
-            $iTime = strtotime($sWake);
-        } else {
-            // Sleep untill next day wake time
-            $iTime = strtotime(sprintf('%s + 1 day', $sWake));
-        }
-        printf("[%s] Sleeping untill: %s\n", date('r'), date('r', $iTime));
-        time_sleep_until($iTime);
+        /* Schedule next wake time */            
+        $sTime = date('H:i', strtotime($sWake)); // ignore slight deviation for next day
+        command(sprintf('at -f %s %s 2> /dev/null', FILE_DAEMON_START, $sTime));
+        System_Daemon::info(sprintf('Waiting untill %s', $sTime));
+        $bStop = true;
     }
 }
-echo "\n";
 
-function getHour($sTime = null) {
-    $iTime = $sTime === null ? time() : strtotime($sTime);
-    return date('H', $iTime) + date('i', $iTime) / 60;     
-}
+/* Stop daemon */
+System_Daemon::stop();
\ No newline at end of file
diff --git a/opt/inverter/pvoutput.php b/opt/inverter/pvoutput.php
index 21d2029..2c0f0f0 100644
--- a/opt/inverter/pvoutput.php
+++ b/opt/inverter/pvoutput.php
@@ -87,40 +87,4 @@ if (isset($aSystems[$sSerial])) {
             CURLOPT_RETURNTRANSFER => true));
     $sResult = curl_exec($rCurl);
     file_put_contents('pvtest', sprintf("[%s] %s\n", date('r'), $sResult), FILE_APPEND);
-}
-
-/*
-$a = file_get_contents('test');
-$b = explode("\n", $a);
-array_pop($b);
-foreach ($b as $c) {
-	$d = explode(',', $c);
-    $iTime = $d[2];
-	$fToday = $d[4];
-    $fEnergy = $d[6];
-    $fToday = $fToday > ((1 + MARGIN) * $fEnergy) ? $fEnergy : $fToday;
-
-	$fPower = $d[5];
-	$sSerial = $d[3];
-    
-    $e = sprintf("%s,%s,%s\n", date('H:i', $iTime), $fToday * 1000, $fPower);
-    file_put_contents('do.csv', $e, FILE_APPEND);
-
-    
-    /*
-    $rCurl = curl_init();
-    curl_setopt_array($rCurl, array(
-        CURLOPT_URL => PVOUTPUT_URL,
-        CURLOPT_HTTPHEADER => array(
-            sprintf('X-Pvoutput-Apikey: %s', $aSystems[$sSerial][0]),
-            sprintf('X-Pvoutput-SystemId: %s',  $aSystems[$sSerial][1])),
-        CURLOPT_POSTFIELDS => http_build_query(array(
-            'd' => date('Ymd', $iTime),
-            't' => date('H:i', $iTime),
-            'v1' => 1000 * $fToday, // Wh
-            'v2' => $fPower)),
-            CURLOPT_RETURNTRANSFER => true));
-    echo $sResult = curl_exec($rCurl);
-    sleep(61);*
-}
-exit;*/
\ No newline at end of file
+}
\ No newline at end of file