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<!DOCTYPE html>
<meta charset="UTF-8">
<style type="text/css">
#graphs {
text-align: center;
<div id="graphs">
<h1>Solar Überwachung</h1>
<img src="voltages.png">
<img src="voltages_archive.png"><br/><br/>
<img src="currents.png">
<img src="currents_archive.png"><br/><br/>
<img src="soc.png">
<img src="soc_archive.png"><br/><br/>
<img src="charges.png">
<img src="charges_archive.png"><br/><br/>
<img src="relay.png">
<img src="relay_archive.png"><br/><br/>
<script type="text/javascript">
function update() {
var imgs = document.getElementById("graphs").getElementsByTagName("img");
for(img of imgs) {
var baseUrl = img.src.split('?')[0];
img.src = baseUrl + '?' + (new Date().valueOf());
window.setTimeout(update, 60*1000);
(function() {