# MPPT 75/15 Equalisation

**URL:** <https://community.victronenergy.com/t/mppt-75-15-equalisation/16861>\
**Category:** DIY\
**Tags:** parallel, campervan, battery\_protect, diy\
**Created:** [29 December 2024 11:19 UTC](https://community.victronenergy.com/t/mppt-75-15-equalisation/16861 "2024-12-29T11:19:26Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![lucas99](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lucas99](https://community.victronenergy.com/u/lucas99)\
**Post date:** [29 December 2024 11:19 UTC](https://community.victronenergy.com/t/mppt-75-15-equalisation/16861/1 "2024-12-29T11:19:26Z")

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I have 2 x 85ah 12v flooded batteries in parallel connected to the above controller with a 120w panel. I am in an area with constant sunshine, and the panel can be moved for maximum output. When I start the manual EQ process after the controller reaches Float, I never see a higher battery voltage than around 14.6v even though the panel voltage is over 20v. Can anyone advise why this is? I can’t see how 14.6v is any good for Equalisation. Thanks!

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**Author:** ![Netrange](https://avatars.discourse-cdn.com/v4/letter/n/7ab992/32.png) [@Netrange](https://community.victronenergy.com/u/Netrange)\
**Post date:** [29 December 2024 12:00 UTC](https://community.victronenergy.com/t/mppt-75-15-equalisation/16861/2 "2024-12-29T12:00:37Z")

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Are you using a shunt on your battery or are you doing the charging process manually?  
How high would you want to go on your battery?  
14.6V is already quite high for a Pb battery … What would the data sheet say?

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**Author:** ![lucas99](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lucas99](https://community.victronenergy.com/u/lucas99)\
**Post date:** [29 December 2024 15:21 UTC](https://community.victronenergy.com/t/mppt-75-15-equalisation/16861/4 "2024-12-29T15:21:23Z")

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No shunt, just the controller. I may be wrong, but the eq process should be the same as a desulphur process on other devices. High voltage, but low current.

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**Author:** ![lucas99](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lucas99](https://community.victronenergy.com/u/lucas99)\
**Post date:** [29 December 2024 15:23 UTC](https://community.victronenergy.com/t/mppt-75-15-equalisation/16861/5 "2024-12-29T15:23:17Z")

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Yes, but the controller default settings limit the current to 8% of the absorption current. I would have expected the Equalisation voltage to be between 15-16v going by a 7 stage mains charger I also have installed on the system.

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**Author:** ![lucas99](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@lucas99](https://community.victronenergy.com/u/lucas99)\
**Post date:** [29 December 2024 15:24 UTC](https://community.victronenergy.com/t/mppt-75-15-equalisation/16861/6 "2024-12-29T15:24:35Z")

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Additionally, the process appears to end after 30 mins. The setting is still at max 1 hour, so I don’t know what is causing this.

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**Author:** ![HQposter](https://avatars.discourse-cdn.com/v4/letter/h/b5a626/32.png) [@HQposter](https://community.victronenergy.com/u/HQposter)\
**Post date:** [5 July 2025 02:36 UTC](https://community.victronenergy.com/t/mppt-75-15-equalisation/16861/8 "2025-07-05T02:36:25Z")

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15-16V sounds high, too high. Check your battery documentation and follow that. Chargers are generic - don’t rely on their generic settings to dictate charge parameters for your battery.