# My mppt not working? **URL:** \ **Category:** DIY\ **Tags:** battery\_balancer, marine, beginner\ **Created:** [19 April 2026 18:48 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749 "2026-04-19T18:48:28Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Bosse315](https://avatars.discourse-cdn.com/v4/letter/b/a6a055/32.png) [@Bosse315](https://community.victronenergy.com/u/Bosse315)\ **Post date:** [19 April 2026 18:48 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749/1 "2026-04-19T18:48:28Z")
Hi all, here is a question from a beginner: I I ave a victron batt charger mppt 75/10 which seems to be working in my ![batt charger2](https://europe1.discourse-cdn.com/victron/original/3X/3/0/30d52e3a98f8bac551925e1166b4abef68008194.png) ![batt charger1](https://europe1.discourse-cdn.com/victron/original/3X/f/d/fd9c5c44bf5483a222820dbc0180d2b589faf3b3.jpeg) boat. The solar panel was connected and today it seems to be working. Lamp is blue and volt from panel is ok but no load is going to the battery. Why is that? What am I missing here? It says bulk… ---
**Author:** ![nickdb](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/nickdb/32/51440_2.png) [@nickdb](https://community.victronenergy.com/u/nickdb)\ **Post date:** [19 April 2026 18:56 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749/2 "2026-04-19T18:56:29Z")
Your PV voltage is too low. It needs to be 6V above the battery voltage to start ---
**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:** [19 April 2026 19:49 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749/3 "2026-04-19T19:49:57Z")
As Nick says, the PV voltage is too low, what panel are you using? ---
**Author:** ![Bosse315](https://avatars.discourse-cdn.com/v4/letter/b/a6a055/32.png) [@Bosse315](https://community.victronenergy.com/u/Bosse315)\ **Post date:** [21 April 2026 13:21 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749/4 "2026-04-21T13:21:40Z")
It’s a solarmare 50W mono 2.0. When the solar panel is not connected the blue lamp is flashing. Why is that? When connected its a fixed light. Ok, then I’ll wait until I have less Volt on the battery. ---
**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\ **Post date:** [21 April 2026 16:02 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749/5 "2026-04-21T16:02:19Z")
[![](https://europe1.discourse-cdn.com/victron/original/3X/5/4/545f27d55f86e0159a664932cda67dc219b3c760.jpeg "Did you know...why the MPPT charge controller starts 5Vdc above the battery voltage?") ](https://www.youtube.com/watch?v=EVAvRs32TiE) ---
**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:** [22 April 2026 01:16 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749/6 "2026-04-22T01:16:30Z")
blue light always flashes when battery is on and pv is off. just so you know the unit is working… ---
**Author:** ![TherealKT](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/therealkt/32/43291_2.png) [@TherealKT](https://community.victronenergy.com/u/TherealKT)\ **Post date:** [22 April 2026 02:46 UTC](https://community.victronenergy.com/t/my-mppt-not-working/56749/7 "2026-04-22T02:46:39Z")
Is no one going to ask why the battery is at 14.37V? Is there another charging source operating? Also, 16.18V is pretty low voltage for a solar panel even in cloudy weather. You may continue to have issues with getting it to work consistently.