# Different firmware versions on Pylontech? **URL:** \ **Category:** Deutschsprachiger Bereich\ **Created:** [11 August 2026 19:17 UTC](https://community.victronenergy.com/t/pylontechs-unterschiedliche-firmwarestande/61559 "2026-08-11T19:17:50Z")\ **Posts on this page:** 1\ **Showing post:** 11
**Author:** ![M\_Lange](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/m_lange/32/16_2.png) [@M\_Lange](https://community.victronenergy.com/u/M_Lange)\ **Post date:** [12 August 2026 11:15 UTC](https://community.victronenergy.com/t/pylontechs-unterschiedliche-firmwarestande/61559/11 "2026-08-12T11:15:51Z")
As I said, the update aborts via VRM if you select the wrong file. At least, that’s what happened in my test, where I deliberately selected the wrong file. So, basically, nothing can go wrong. Unfortunately, I couldn’t test a scenario like yours, as I only had US2000C/3000C units with the same board available. So I can’t say for certain whether the master forwards the “wrong” file to the corresponding module or simply stops with an error. > [@V3.70~74: Pylontech update feature](https://community.victronenergy.com/t/v3-70-74-pylontech-update-feature/51598/42?u=m_lange): > > The new US2000C and US3000C are using the same board, E2. The US5000 is using E3. So a combination of US3000 and US2000 is a little bit irrelevant, because are using the same hardware and only the Coulomb info is different. Interesting would be a combination of US5000 and US3000/US2000, because it may be possible that if the FW is for US5000, only the US5000 (usually the master) to update and if the FW is for US3000/US2000, the master to pass it downwards and only US3000/US2000 to update. I might ask our former Pylontech supplier whether they have the possibility to test this. --- _[View the full topic](https://community.victronenergy.com/t/pylontechs-unterschiedliche-firmwarestande/61559)._