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What is ‘Float Voltage’ Charger setting in VictronConnect using Multiplus-II?
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The ‘Float Voltage’ setting in the ‘Charger’ section of the VictronConnect app is a parameter in the battery charging process, particularly in the final stage of charging.
Function:
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After the bulk phase of charging, where batteries are charged at a constant high current, the charger transitions to the absorption phase, where voltage is held steady and current gradually decreases as the battery approaches full charge.
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Once the absorption phase is complete, the charger enters the float phase. Here, the ‘Float Voltage’ is a lower voltage level applied to the batteries to maintain them at full charge without overcharging.
Purpose of Float Voltage:
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This reduced voltage allows the battery to draw just enough current to counteract self-discharge, maintaining its full charge without producing excessive heat or promoting gassing, which can happen with lead-acid batteries.
Setting the Value:
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The appropriate float voltage setting depends on the type of battery you’re using. Manufacturers typically provide specifications for float voltage, so you should refer to these guidelines.
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For example, a typical float voltage for a lead-acid battery might be around 13.2V to 13.8V per 12V unit, but this can vary based on the specific chemistry and construction of the battery.
Usage Tips:
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It’s important not to set the float voltage too high, as this can lead to overcharging and reduce the lifespan of the battery.
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However, setting it too low may result in the battery never reaching or maintaining full charge. Properly calibrated float voltage ensures that your batteries stay charged and ready for use without incurring damage from the charging process.
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