Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
All EV's use precharge circuits within their systems and they have abused & bashed the heck out of Relays & Contactors and know what NOT to do.
Non-Precharge in the solar world of gear wasn't a huge issue with Big Lead as it can take that kind of hit but switches & relays if not handled properly got welded together... albeit far less often. With any Lithium Base what Li can deliver in a burst is HUGE comparatively and that does weld things up very quickly. Remember that LFP for example can dump @ 5C for 5 Seconds crunch the #'s and if you have a Big Bank - it is Holy Crap That's a LOT of Amps ! Dump a 30kWh Bank @ 5C and watch lightning !
Some companies have finally gotten it and are adding precharge to the Inverter/Charger - AIO devices.
Sadly documenting such Need or Requirement is an obvious afterthought for many, and do not expect low ball value products to mention such unless pushed to do so... Tier-1 companies are now addressing such, starting to anyways.
Non-Precharge in the solar world of gear wasn't a huge issue with Big Lead as it can take that kind of hit but switches & relays if not handled properly got welded together... albeit far less often. With any Lithium Base what Li can deliver in a burst is HUGE comparatively and that does weld things up very quickly. Remember that LFP for example can dump @ 5C for 5 Seconds crunch the #'s and if you have a Big Bank - it is Holy Crap That's a LOT of Amps ! Dump a 30kWh Bank @ 5C and watch lightning !
Some companies have finally gotten it and are adding precharge to the Inverter/Charger - AIO devices.
Sadly documenting such Need or Requirement is an obvious afterthought for many, and do not expect low ball value products to mention such unless pushed to do so... Tier-1 companies are now addressing such, starting to anyways.