Overview: best rectifiers for charging (voltage mod) - Eltek/Delta/Huawei/Emerson/Vertiv

[Tomblarom]

I couldn't find anything like this and made this for myself to compare common telecommunication PSUs / rectifiers. Trying to update this frequently. Used datasheets attached. Enjoy!

Eltek

• CAN / I²C: viewtopic.php?f=14&t=71139

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  Model        Power   Size               Voltage        C@48v   Eff.    Weight   Public Protocols
 ------------ ------- ------------------ -------------- ------- ------- -------- ------------------
  48/1000 HE   1000W    72.0×41.5×217.0   43.5 - 57.6V   20.9A   95.5%    850g    CAN, I²C
  48/1800 HE   1800W    72.0×41.5×217.0   43.5 - 57.6V   37.5A   96.0%    850g    CAN, I²C

Emerson/Vertiv

• CAN: viewtopic.php?f=14&t=114785

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  Model        Power   Size               Voltage        C@48v   Eff.    Weight   Public Protocols  
 ------------ ------- ------------------ -------------- ------- ------- -------- ------------------ 
  R48-1000e3   1000W    52.0×41.0×152.0   42.0 - 58.0V   20.8A   95.4%    600g    Nothing yet
  R48-2000e3   2000W    84.5×41.0×252.5   42.0 - 58.0V   42.0A   96.2%   1130g    Nothing yet
  R48-3000e3   3000W    84.5×41.0×330.0   42.0 - 58.0V   62.5A   96.0%   2000g    Nothing yet

ImPow

• CAN: viewtopic.php?f=14&t=114786&p=1697370

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  Model       Power   Size               Voltage       C@48v   Eff.    Weight   Public Protocols  
 ----------- ------- ------------------ ------------- ------- ------- -------- ------------------ 
  R481200H1   1200W    70.3×42.5×253.0   42.0 - 58.0   25.1    96.0%   1000g    CAN               
  R482000H1   2000W    70.3×42.5×286.0   42.0 - 58.0   41.6    95.0%   1300g    CAN               
  R483000H1   2000W   106.0×42.5×286.0   42.0 - 58.0   62.5    96.0%   1900g    CAN               

Huawei

• Voltage mod: https://www.znds.com/tv-1170402-1-1.html
• CAN/Voltage mod: viewtopic.php?f=14&t=86038
• CAN: https://github.com/craigpeacock/Huawei_R4850G2_CAN
• CAN: http://bbs.38hot.net/thread-101073-1-1.html

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  Model     Power   Size             Voltage       C@48v   Eff.    Weight   Public Protocols  
 --------- ------- ---------------- ------------- ------- ------- -------- ------------------ 
  R4850G2   3000W   105×40.8×281.0   42.0 - 58.0   62.5A   96.0%   2000g    CAN               

Delta

• Voltage mod: https://www.bilibili.com/video/BV1RM4y1A7p1
• Voltage mod: https://www.bilibili.com/video/BV1t7411j7u1

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  Model        Power   Size               Voltage        C@48v   Eff.     Weight   Public Protocols
 ------------ ------- ------------------ -------------- ------- -------- -------- ------------------
  ESR-48/56    2880W   125.0×41.0×269.9   40.0 - 59.0V   55.0A   91.0%    2000g    Nothing yet

--> You can find a lot more results on mods using "model + 改可调" which means "voltage mod".

[john61ct]

WOW excellent resources, thanks so much for contributing this!

48V is a sweet spot for "backbone" distribution, minimizes distribution losses using cables with lower currents bussed throughout the system using smaller, less expensive conductors

then using quality DC-DC chargers & converter modules close to their loads as secondary voltage sources.

[Tomblarom]

48V is a sweet spot for "backbone" distribution

And for charging Li-Ion. Up until 14S (58.8v).