• Multiplus II Inverters

  What’s happening when both ‘bulk’ and ‘absorption’ LEDs are lit on my MultiPlus-

  Posted by Innova on January 14, 2024 at 5:41 pm

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  I’ve got a situation where both the ‘bulk’ and ‘absorption’ LEDs are on at the same time on my MultiPlus-II 230V. Is this normal and what does it indicate about the charging process?

  Olson replied 5 months, 3 weeks ago 2 Members · 1 Reply
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  Olson

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  January 14, 2024 at 6:32 pm

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  When both the ‘bulk’ and ‘absorption’ LEDs are on simultaneously on your MultiPlus-II 230V, it indicates the BatterySafe mode of operation.

  Here’s what this means for your charging process:

  • Mains Voltage: The AC mains voltage is being supplied to the charger, which is actively working to charge your batteries.

  • BatterySafe Mode: This mode is designed to prevent damage due to excessive gassing (lead acid batteries only) that can happen if the absorption voltage is too high for the battery, especially during the later stages of charging.

  • Absorption Voltage Not Reached: While both LEDs are on, it means the charger is in the process of bringing the battery up to the set absorption voltage but hasn’t quite reached it yet. This could happen if the battery was deeply discharged and the charger is being cautious to bring it up to full charge without causing any damage.

  • Charging Process: The charger is ensuring that the batteries are charged safely and effectively. Once the absorption voltage is reached, the charger will move to the next phase of charging, ensuring that the batteries are topped up without overcharging.

  This dual LED indication is a good sign that your charger is working efficiently to keep your batteries in top condition while ensuring their longevity. It’s managing the fine balance between charging quickly and charging safely.

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