I am orienting to buy a SmartSolar with 48V output (vbat). I have 1 solar panel (PV) that has the following specs: Open circuit voltage: 48V Max power voltage: 40V According to datasheet for SmartSolar Charge Controller MPPT 150/35 with 48V output Datasheet-SmartSolar-charge-controller…

Or you switch to a lower voltage battery system. Campers usually have 12/24v for this very reason.

[image] ErikC: How can we resolve it? With a DC/DC converter on input or on output? Is there an alternative charger from Victron? The easiest solution would be to have 2 panels in series.

[image] ErikC: With a DC/DC converter on input or on output? Is there an alternative charger from Victron? Using a dc to dc boost wont work, and Victron dont make boost mppt’s. Using a higher voltage panel, or lower voltage battery are your only choices.

Remember that your mpp will be around 75-80% of Voc. You could find a smaller panel with the same Icc (I closed circuit) to put in series so you get a higher Voc. Also note that the smaller (and cheaper) 100/20 charger might be sufficient for your limited pv input. It can handle 1kw pv on a 48v syst…

I have experimented with this for my systems. You can use an Orion-Tr 48/48 converter power matched to the panel they go up to 380w to boost the voltage from the panel and output that into a 100/20 with a 60V output setting. Or you can setup a small 12v or 24v battery and charge from the solar then …

[image] ErikC: SmartSolar Charge Controller MPPT Thanks for suggestions. I want to apply a solar of 500Wp on roof of campervan. There are also another options. That is a high-voltage PV panel that is only available for business, but not for homeowners. Like Sunpower Maxeon with Voc=70V. I…

Using a dc to dc boost wont work Can you explain why it will not work? The following can be an example. [image] DC 600W step up converter - HobbyElectronica DC 600W step up converter is een krachtige DC-DC converter met zowel constante stroom als constante spanning functionaliteit. Dez…

[image] ErikC: Can you explain why it will not work? The mppt is designed to draw the maximum amount of power available from a solar panel given the varying amount of sun (power) that is available. Under low light (or varying light) the boost controller will not be able to give a steady volt…

Why won’t a dc/dc boost work? Can it be made to work? What about the Victron BlueSolar PWM? I am trying to charge a 48V LiPO4 battery with only 40VoC. I have a dc boost, but the mppt charger only yields 10W power. Is the problem coming from the boost voltage? Can it be stabilized?

The greater the difference between the PV voltage and cell voltage the more effective an MPPT charger becomes because it is less constrained in finding the maximum power point. Victron has a document on this on their website at MPPT or PWM If your PV voltage is within 5V of the battery charging vo…

SmartSolar with low PV voltage

DIY

ErikC 5 November 2024 12:59 3

I know but I am limited with 1 panel on roof of a campervan.

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SmartSolar with low PV voltage

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