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Alternative Power
mygoggie's venture in the world of hybrid electrical systems
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<blockquote data-quote="mygoggie" data-source="post: 1147158" data-attributes="member: 18916"><p>Calculating MPPT size ... and then seeing what these little blue boxes cost. Sigh ...</p><p></p><p>Victron has a <a href="https://www.victronenergy.com/mppt-calculator" target="_blank">very nice calculator </a>that allows you to enter the PV panel specifications and allows you to play around with the number of panels in series and parallel.</p><p></p><p>I learned one thing today from this. MPPTs will be another factor to consider when you decide on the number of PV panels you are installing. A simple example is that I will require the same number and type of MPPTs if I install 20 panels or 24. It becomes a "cost of equipment" optimisation game where the cost of panels can be played off against the cost of the MPPTs and the energy you require.</p><p></p><p>I also learned from one distributor today that quite a few people blow their installed MPPTs because they did not take into account the Voc voltage spiking effect when a PV panel sitting without sunshine at minus 0 C, suddenly start generating electricity when the sun energizes it.</p><p></p><p>In addition he also mentioned installer who do not take the phenomenon named cloud albedo effect, into consideration when choosing a MPPT.</p><p></p><p>Never realised that these two factors can actually create the holy smoke.</p></blockquote><p></p>
[QUOTE="mygoggie, post: 1147158, member: 18916"] Calculating MPPT size ... and then seeing what these little blue boxes cost. Sigh ... Victron has a [URL='https://www.victronenergy.com/mppt-calculator']very nice calculator [/URL]that allows you to enter the PV panel specifications and allows you to play around with the number of panels in series and parallel. I learned one thing today from this. MPPTs will be another factor to consider when you decide on the number of PV panels you are installing. A simple example is that I will require the same number and type of MPPTs if I install 20 panels or 24. It becomes a "cost of equipment" optimisation game where the cost of panels can be played off against the cost of the MPPTs and the energy you require. I also learned from one distributor today that quite a few people blow their installed MPPTs because they did not take into account the Voc voltage spiking effect when a PV panel sitting without sunshine at minus 0 C, suddenly start generating electricity when the sun energizes it. In addition he also mentioned installer who do not take the phenomenon named cloud albedo effect, into consideration when choosing a MPPT. Never realised that these two factors can actually create the holy smoke. [/QUOTE]
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mygoggie's venture in the world of hybrid electrical systems
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