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		<title>#7 Cut-off relay vs. charge booster</title>
		<link>https://itsus.eu/en/cat_dosen-dasein/7-trennrelais-vs-ladebooster</link>
		
		<dc:creator><![CDATA[Tobias]]></dc:creator>
		<pubDate>Wed, 22 Jul 2020 11:04:00 +0000</pubDate>
				<category><![CDATA[vanlife]]></category>
		<category><![CDATA[Baron/Baroness]]></category>
		<category><![CDATA[Emperor/Empress]]></category>
		<category><![CDATA[King/Queen]]></category>
		<category><![CDATA[Prince/Princess]]></category>
		<category><![CDATA[agm]]></category>
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		<category><![CDATA[camperlife]]></category>
		<category><![CDATA[CamperStrom]]></category>
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		<category><![CDATA[diy]]></category>
		<category><![CDATA[diycamper]]></category>
		<category><![CDATA[ladebooster]]></category>
		<category><![CDATA[lifepo]]></category>
		<category><![CDATA[trennrelais]]></category>
		<category><![CDATA[VanLife]]></category>
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					<description><![CDATA[Trennrelais oder Ladebooster? Was ist der Unterscheid und wann brauche ich was? Zunächst mal die Geminsamkeiten: Beide Varianten dienen dazu, dass die Lichtmaschine nicht nur die Starterbattere, sondern auch die Aufbaubatterie lädt. In beiden Fällen wird zuerst die Starterbatterie geladen und wenn diese aufgeladen ist, dann wird die überschüssige Energie der Lichtmaschine an die Aufbaubatterie [&#8230;]]]></description>
										<content:encoded><![CDATA[
<p>Trennrelais oder Ladebooster? Was ist der Unterscheid und wann brauche ich was?</p>



<p>Zunächst mal die Geminsamkeiten: Beide Varianten dienen dazu, dass die Lichtmaschine nicht nur die Starterbattere, sondern auch die Aufbaubatterie lädt. In beiden Fällen wird zuerst die Starterbatterie geladen und wenn diese aufgeladen ist, dann wird die überschüssige Energie der Lichtmaschine an die Aufbaubatterie geleitet.</p>



<p>Dies macht alles das Trennrelais und mehr macht es eben auch nicht. Nun kommt der Ladebooster ins Spiel, denn das Problem entsteht vorallem bei neueren Fahrzeugen ab ca Euro 5 Norm. Diese schalten nämlich die Lichtmaschine ab, wenn die Starterbatterie voll ist, was bei einem Trennrelais dazu führt, dass die Aufbaubatterie garnicht geladen würde. Hier kommt der Ladebooster und sagt dem Steuergerät praktisch, dass die Starterbatterie noch garnicht voll ist so dass die Lichtmaschine weiterhin Strom liefert, der dann an die Aufbaubatterie geht. Allerings hat der Ladebooster generell eine &#8220;intelligente&#8221; Elektronik verbaut, zumindet im Vergleich zum Trennrelais und daher kann der Ladebooster nicht nur Steuergeräte von modernen Fahrzeugen austricksen, sondern auch optimiert für LiFePo Batterien und deren Kennlinien arbeiten und so eine schnellere Ladung erwirken. </p>



<p>Dies ist nun alles etwas vereinfacht ausgedrückt aber es soll einfach nur klarmachen, dass ein Trennrelais so gesehen zwar überholt ist aber im Falle eines älteren Fahrzeugs in Verbindung mit älteren Batterietypen wie z.B. Blei, Gel oder auch AGM Batterien durchaus ausreichend ist. Nutzt man entweder moderne LiFePo Batterien oder hat ein modernes Auto, dann ist ein Ladebooster Pflicht um das beste Ergebnis erzielen zu können.</p>



<p>Trotz meiner Pläne einen Oldtimer zu kaufen, werde ich mich für einen Ladebooster entscheiden. Einfach aus dem Grund, dass ich fähig bin, die geplanten AGM Batterien später problemlos gegen LiFePo Batterien austauschen zu können.</p>



<p>Die beiden Artikel vom Bild:<br><a rel="noreferrer noopener" href="https://amzn.to/3jZrELZ" target="_blank">Trennrelais</a>*<br><a rel="noreferrer noopener" href="https://amzn.to/336vw7H" target="_blank">Ladebooster</a>*</p>



<p class="has-small-font-size">* The links are so called affiliate links. This is a fair way to support me and say thank you, because it costs you nothing except the regular price of the item and I get a commission for your purchase which helps me to realize this project and the following.<br></p>
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			</item>
		<item>
		<title>#5 The solar system</title>
		<link>https://itsus.eu/en/cat_dosen-dasein/5-die-solaranlage</link>
					<comments>https://itsus.eu/en/cat_dosen-dasein/5-die-solaranlage#comments</comments>
		
		<dc:creator><![CDATA[Tobias]]></dc:creator>
		<pubDate>Thu, 16 Jul 2020 18:00:00 +0000</pubDate>
				<category><![CDATA[vanlife]]></category>
		<category><![CDATA[Baron/Baroness]]></category>
		<category><![CDATA[Emperor/Empress]]></category>
		<category><![CDATA[King/Queen]]></category>
		<category><![CDATA[Prince/Princess]]></category>
		<category><![CDATA[agm]]></category>
		<category><![CDATA[batterien]]></category>
		<category><![CDATA[camperlife]]></category>
		<category><![CDATA[CamperStrom]]></category>
		<category><![CDATA[campinglife]]></category>
		<category><![CDATA[diycamper]]></category>
		<category><![CDATA[laderegler]]></category>
		<category><![CDATA[lifepo]]></category>
		<category><![CDATA[mppt]]></category>
		<category><![CDATA[photovoltaik]]></category>
		<category><![CDATA[pwm]]></category>
		<category><![CDATA[Solar]]></category>
		<category><![CDATA[solarregler]]></category>
		<category><![CDATA[Solarstrom]]></category>
		<category><![CDATA[VanLife]]></category>
		<guid isPermaLink="false">https://blog.tobiasn.eu/?p=74</guid>

					<description><![CDATA[I&#8217;ll give you a warning: This topic offers enough space to fill whole books, so I just have to cut at some places. If I will make my own contribution out of it, we will see then.]]></description>
										<content:encoded><![CDATA[
<p>I&#8217;ll give you a warning: This topic offers enough space to fill whole books, so I just have to cut at some places. If I will make my own contribution out of it, we will see then.</p>



<Solar plants (SP), or actually photovoltaic plants, are probably the best way to supply oneself with electricity. That's why every motorhome now has such a system on the roof. The advantages are obvious but what are the disadvantages?



<p>shadow parkers are excluded! Clearly, because a SP has the shadow as its natural mortal enemy. But sun parkers do not have to do without a pleasant indoor climate. Good insulation is already half the battle. (You guessed it? There will be a contribution to this)</p>



<p>Now we still stick to the so called shading. This has a great influence on the whole SP if only a tiny piece of the solar panel is shaded. Well then I will just take 2, 3 or even more panels. Yes, ok and that is without alternative in my case because of the hunger for electricity but how do I connect them? In row or parallel? Unfortunately there is only one correct answer&#8230;</p>



<p>short: A solar panel consists of several cells. Each cell produces 0.5V and these are usually connected in series of 36 pieces, so that you get a total voltage of 18V. Keyword light chain! If one cell fails, the whole panel fails. Luckily there are diodes in the panel to prevent this but still the voltage is halved. <img src="https://s.w.org/images/core/emoji/14.0.0/72x72/1f641.png" alt="🙁" class="wp-smiley" style="height: 1em; max-height: 1em;" /></p>



<p>So there should be several panels:<br><br>The serial circuit: </p>



<p>The panels are connected as follows:</p>



<figure class="wp-block-image size-large"><img decoding="async" src="https://itsus.eu/wp-content/uploads/serielle-solarpanele.png" alt="Reihenschaltung Solarpanele"/><figcaption>einfache Skizze für Reihenschaltung von Solarpanele</figcaption></figure>



<div class="wp-block-columns is-layout-flex wp-container-3">
<div class="wp-block-column is-layout-flow">
<h3 class="has-text-align-center wp-block-heading">Advantages</h3>



<ul><li>Simple cabling</li><li>smaller cable cross sections</li><li>More power</li><li>Shading is better compensated</li></ul>
</div>



<div class="wp-block-column is-layout-flow">
<h3 class="has-text-align-center wp-block-heading">Disadvantages</h3>



<ul><li>Only identical modules in a chain (current intensity)</li><li>increasing voltage means higher safety measures (contact safety)</li><li>The solar controllers are more expensive the more input voltage is allowed</li><li>MPPT controller more efficient but more expensive</li></ul>
</div>
</div>



<p>Ok then rather parallel?</p>



<figure class="wp-block-image size-large"><img decoding="async" src="https://itsus.eu/wp-content/uploads/parallele-solarpanele.png" alt=""/><figcaption>parallel Anschluß von Solarpanele</figcaption></figure>



<div class="wp-block-columns is-layout-flex wp-container-6">
<div class="wp-block-column is-layout-flow">
<h3 class="has-text-align-center wp-block-heading">Advantages</h3>



<ul><li>The performance of the modules can be different</li><li>Mobile modules can be added if the voltage is equal</li><li>no problems with PWM controllers</li></ul>
</div>



<div class="wp-block-column is-layout-flow">
<h3 class="has-text-align-center wp-block-heading">Disadvantages</h3>



<ul><li>Cabling more complicated</li><li>thicker cable cross sections necessary</li><li>Losses in shading per string higher</li></ul>



<p></p>
</div>
</div>



<p>And what is better now? This question can only be answered by yourself and in the end it is certainly also a budget question. Who, like me, has to pay a lot of attention to the budget, will probably prefer parallel connection. Especially if only 2 panels are planned. With 4 and more panels, a combination can also be effective.</p>



<p>I am currently planning to use 4pk 100 Watt panels and the combined circuit, i.e. 2 parallel and 2 serial. The whole thing is connected to a PWM solar controller and 2-3pcs 200Ah AGM batteries. Of course I would also prefer LiFeYPo batteries but the weight is irrelevant for my planning and the higher efficiency is unfortunately not outweighed by the price. However, this may still change, because building a 300-400 Ah battery by myself is still an idea in my head.



<p>What is the conclusion now? Actually there is none. At least no generally valid one. If you don&#8217;t have to pay attention to the money, you should connect high quality 72 cell modules in series (serial) and use lithium batteries with a high quality MPPT regulator.</p>



<p>Whoever chooses the cheapest way is more likely to get 36 cell modules connected in parallel via a PWM controller to supply conventional AGM batteries.



<p><p>And the most important decision criterion is and remains How much electricity do I consume per day and how much of it I have to recharge per day. In the end, the battery decides how long I can stand independently, because if it snows for a week in winter, the SP supplies an estimated 0 electricity.</p>.</p>
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