# Solar controller 75/15 always in float **URL:** \ **Category:** DIY\ **Tags:** leisure\_batteries, diy\ **Created:** [22 July 2026 20:23 UTC](https://community.victronenergy.com/t/solar-controller-75-15-always-in-float/60753 "2026-07-22T20:23:26Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ChrisWDH](https://avatars.discourse-cdn.com/v4/letter/c/cab0a1/32.png) [@ChrisWDH](https://community.victronenergy.com/u/ChrisWDH)\ **Post date:** [22 July 2026 20:23 UTC](https://community.victronenergy.com/t/solar-controller-75-15-always-in-float/60753/1 "2026-07-22T20:23:26Z")
Had to replace solar panel and battery in van. Installed a eco-worthy 18v 200w panel and a Superbatt Deep Cycle Leisure Battery 12V 130AH SB HL500 battery. Decided to get the Victron SmartSolar 75/15. Used existing wiring. All appliances run off the battery, none through the load out connections. Solar voltage as been around 25/26v, battery reading 13.7v, but always in float and only max of 1w on solar. Thought all was okay, but noticed that the display on my usb socket which had a reading of over 13v has slowly declined and is now on 11.2. I think the battery is draining and the controller is not shifting from float to absorption .preset used in the app. Any ideas? Any help greatly appreciated . ---
**Author:** ![pwfarnell](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/pwfarnell/32/2341_2.png) [@pwfarnell](https://community.victronenergy.com/u/pwfarnell)\ **Post date:** [22 July 2026 20:27 UTC](https://community.victronenergy.com/t/solar-controller-75-15-always-in-float/60753/2 "2026-07-22T20:27:20Z")
You most likely have a poor connection between the MPPT output terminals and the battery. The MPPT is on float because it is not connected to the battery. ---
**Author:** ![MikeD](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/miked/32/1522_2.png) [@MikeD](https://community.victronenergy.com/u/MikeD)\ **Post date:** [23 July 2026 01:17 UTC](https://community.victronenergy.com/t/solar-controller-75-15-always-in-float/60753/3 "2026-07-23T01:17:00Z")
check for volt drop from MPPT+ to battery +, and MPPT- to battery - . This will show any poor connection as per pwfarnell. There is also an internal fuse in the MPPT that may have got blown.