# Victron smart tr 12 /12/ 30A none isolation dc dc charger **URL:** \ **Category:** DIY\ **Tags:** fogstar, dc-dc\_charger, beginner, cerbo\_gx\ **Created:** [27 August 2025 20:38 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440 "2025-08-27T20:38:41Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Armyjo65](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/armyjo65/32/33986_2.png) [@Armyjo65](https://community.victronenergy.com/u/Armyjo65)\ **Post date:** [27 August 2025 20:38 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/1 "2025-08-27T20:38:41Z")
1 - Victron Orion TR 30A DC 2DC power light doesn’t come on but charger functions normally. Why would this be? Bluetooth operation ok. 2 - Charge from Orion shows as negative on Cerbo DC tile and loads show as positive - can this be changed? (shunt is fitted and all negatives on correct side) 4 - Lynx Distributor with lights mod is showing orange/redish light but megafuse is intact? Why might this be? 5 - Fogstar Drift app current +/- matches cerbo display but battery % different? ---
**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:** [28 August 2025 20:45 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/2 "2025-08-28T20:45:35Z")
Hi, please can you add some more details about your system, like a schematic to show how all the units are connected? This might help us understand the problems better. ---
**Author:** ![Armyjo65](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/armyjo65/32/33986_2.png) [@Armyjo65](https://community.victronenergy.com/u/Armyjo65)\ **Post date:** [28 August 2025 21:08 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/3 "2025-08-28T21:08:09Z")
Hi Mike Thanks for getting back to me. Please see attached. Additionally I have a Frogstar driff 280ah lithium battery. Cheers > **(attachments)** > > [Tony.pdf](https://community.victronenergy.com/uploads/short-url/e6HrypeBRKhyWJsgAfBCKBcOwHF.pdf) (483 KB) ---
**Author:** ![chrigu](https://avatars.discourse-cdn.com/v4/letter/c/ba9def/32.png) [@chrigu](https://community.victronenergy.com/u/chrigu)\ **Post date:** [28 August 2025 21:11 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/4 "2025-08-28T21:11:55Z")
> [@Armyjo65](#): > > Orion TR 30A DC 2DC Is it the non-smart version, without bluetooth? If so then its not a DC-DC charger, its a DC-DC powersupply. Theres no charge algorithm in the non-smart models, all you have is the potentiometer to set a fixed voltage ---
**Author:** ![Armyjo65](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/armyjo65/32/33986_2.png) [@Armyjo65](https://community.victronenergy.com/u/Armyjo65)\ **Post date:** [28 August 2025 21:18 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/5 "2025-08-28T21:18:51Z")
My inverter is 12v /1600w 70-16 230v Mppt Solar charger 100 / 30a Dc to Dc TR 12 / 12 / 30a none isolated Solar panel is 300w 1000 lynks distributer All Victron with the exception on the solar panel. Hope this helps you a little more… Cheers ---
**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:** [28 August 2025 21:59 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/6 "2025-08-28T21:59:53Z")
> [@Armyjo65](#): > > 1 - Victron Orion TR 30A DC 2DC power light doesn’t come on but charger functions normally. Why would this be? Bluetooth operation ok.Check to see if input has correct voltage & fuse is not blown. Is the remote link in? As you say charger is operating normally, then possibly failed LED, not to worry too much. > [@Armyjo65](#): > > 2 - Charge from Orion shows as negative on Cerbo DC tile and loads show as positive - can this be changed? (shunt is fitted and all negatives on correct side) Check the Battery is in fact connected to the battery side of the shunt. Reverse if needed. PV charging should show same sense as the Orion. > [@Armyjo65](#): > > 5 - Fogstar Drift app current +/- matches cerbo display but battery % different? As SOC is a derived measurement, it is not unusual for 2 different sources of SOC to be different. Check that you have the right parameters set up in the shunt, and then they should both synchronise to 100% at next full charge. After that, they should track reasonably. Shunt parameters can be tweaked to correct drift. > [@Armyjo65](#): > > 4 - Lynx Distributor with lights mod is showing orange/redish light but megafuse is intact? Why might this be? if by the ‘lights mod’ you are referring to this: _3.3. The RJ10 cable The RJ10 cable supplies power to the Lynx Distributor from a Lynx Smart BMS or Lynx Shunt VE.Can and transfers data between the Lynx Distributor and the Lynx Smart BMS. The Lynx Distributor does not have an in-built power supply to supply its fuse detection circuit; it relies on this power to be supplied from a Lynx Shunt VE.Can or a Lynx Smart BMS via the RJ10 cable. If the Lynx Distributor is used without a Lynx Shunt VE.Can or a Lynx Smart BMS, it needs to be powered in an alternative way so that the fuse detection circuit is operational. To power the RJ10 cable for standalone use, do the following: • Connect pin 1 of the RJ10 connector to 5V (4.5V-5.5V). • Connect pin 4 to GND._ with various 12V to 5V adapters being available, then the lights should operate as normal. is it the power LED or a fuse led that is showing the colour? _Powering up When the Lynx Distributor is powered up by the Lynx Smart BMS, all LEDs will light up for one second, after which the address briefly is shown via a fuse LED. Fuse 1 LED illuminates for Distributor A, Fuse 2 LED illuminates for Distributor B and so on. The power LED is orange during power up and will turn green once power up is complete._ ---
**Author:** ![Armyjo65](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/armyjo65/32/33986_2.png) [@Armyjo65](https://community.victronenergy.com/u/Armyjo65)\ **Post date:** [29 August 2025 07:30 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/7 "2025-08-29T07:30:35Z")
Hi Mike. It’s a 12v Victron Orion TR Smart 12/12/30a 360w model. Cheers ---
**Author:** ![Armyjo65](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/armyjo65/32/33986_2.png) [@Armyjo65](https://community.victronenergy.com/u/Armyjo65)\ **Post date:** [29 August 2025 09:11 UTC](https://community.victronenergy.com/t/victron-smart-tr-12-12-30a-none-isolation-dc-dc-charger/44440/8 "2025-08-29T09:11:47Z")
It’s a 12v Victron Orion TR Smart 12/12/30a 360w model. Cheers