Redarc’s

[Mrcoolabah1au]

Any clues on good or bad I know it’s Australian made that why it’s twice as dear as any thing else been on there web site just trolling around the web look at different things you get all the over seas stuff victron projecta and others

[T1 Terry]

Very expensive and not up to speed yet in my opinion. They have not spent enough time working with decent sized lithium battery packs to understand the high current flow that can be expected. OK for lead acid because the current flow drops off very quickly so the rated 40 amps is only for 15 to 20 mins, then more likely back to 30 amps or less. If it says it can out out 40 amps, a lithium battery will try to get 50 amps out of it so they run a full power continuously until the battery is all but 100% charged. With no fan and a small case for cooling, they rely of the fact they cut back their current flow till they can maintain their safe operating temp and that can/will severely restrict the actual charge rate and seriously extend the expected recharge time.
Enerdrive, Victron and Projecta all make good products that can handle the serious current flow on a continuous basis and are products we use regularly and have proven they actually work and are reliable.
There is a lot of cheaper stuff out there, but it can't handle the serious work expected when connected to a lithium battery, even if they do claim to have a lithium charging regime .... which by the way, is about the fastest way to destroy a lithium battery .... one of the problems with using the interweb to do your research and copying what everyone else does ..... as the famous Collyn Rivers replied to a post on the CF about the Redarc charging regime being a lithium battery killer "but how can you be right and all the others wrong" my reply "because I actually spent the time on $$ doing hands on research, not keyboard research"
Basically, if the BMS does not monitor cell voltages and interact with the charging appliances, it is not suitable on its own as a lithium charger. About the safest regime in these types of chargers for a lithium battery is the power supply mode if you don't have a proper BMS controlling the charger ...... that will do the least damage .....

T1 Terry

[Mrcoolabah1au]

Wow that some write up well done