LEDgardener

Hello Folks,

I am at odds with my brain right now and how things should and could work. My current setup is 3 QB-288 V2 Quantum Boards with an 1 Mean Well HLG-320H-54B (with Dimmer Knob). Should these boards be fine running parallel? I always hear be careful with parallel wired equipment. With the above setup how would you make this a safe parallel wired setup? If I solder in a inline 3 amp quick fail fuse right before the board on all three boards would that be fine? Worried about the OMG you wired in parallel and thermal run away.

Everyone keeps saying do series but with the current driver it is setup for parallel and I am really wanting to use it the way I have mentioned above but what would you smarter knowledgeable Yodas' say?

Thank you from someone always learning.

welcome to the forum first off

like ya said at the end.. with that driver you have to wire parallel... to wire series you would need a -C 2100B ( most common CC driver amperage for QB's ) instead of a -54b

yes... you'll be fine going parallel... the thermal runaway problems seemed to happen with older cobs, strips. probably also cheap pcb's.... The quantums are beasts!!!! basically if one for some reason goes out.. the other two won't even be phased by it... the extra fuses between boards never hurts.. but is not mandatory...

viewtopic.php?f=11&t=56 here's my light.. started series with 4 QB's.. for same reason.. scared of parallel for first build.. then I upgraded to 6 boards in parallel.. absolutely love it!

here's some fun things to watch our awesome host Ledgardener trying to blow up a 288 v1 around a year ago!!


this is why we don't have to worry about thermal runaway as much!

again welcome to the fun!!

thank you! This morning was a sigh of relief when I saw your post. Now let's talk my driver.. since I have the 320h-54b it seems that is only enough to power 3 boards strictly in parallel and nothing else. The C 2100B could power more than three boards and do BOTH series and parallel or only series? My understanding is B means it comes with a dimmer aka potentiometer... If the driver either -54B, C 2100B or etc were to fail is there an internal fuse or something that would blow first for safety?

Thank you for the welcoming as I am starting to NERD out again and getting my electronic feelers wet again. I love this DIY stuff and knowing YOU made your own stuff work even with the help of other.

Ps: Reading your other posts and link you sent me.

Thank you!!

get the easy ones out of the way first

yeah "B" type drivers have the lead to wire a potentiometer... "A" type have a internal dimmers that you use a small screw driver on.

and I'm pretty sure there's some type of fuse on the a.c. side of the driver for surges... but having another to plug into never hurts..

technically yes.. a HLG 320h-C2100b could be wired in series or parallel and or series/parallel combo.... it all depends on voltages of what your trying to light up.. on the hlg320h-c2100b there is a voltage range of 72 - 152V.. so to make it work we need at lease 72+ volts but try to stay under the 152V.. so to run series we would need at lease 2 QB's to be over that 72V Mark... 3 of the versions 1's would just barley squeeze in the 152v.. with the version 2's being less volts, 3 fits better..

to wire something on that driver in pure parallel we would need a single board or light source that is with in that voltage range of 72-152v. ( qb 304's would fit at their 112 whatever volts) because we split amperage over voltage in parallel.. wired like this you could stick as many boards as you wanted on it.. each board just splits the 2100ma.. so two boards would roughly run at 1050ma each.. 3 boards would be around 700ma each.. etc etc...

then you got series/parallel wiring.. https://horticulturelightinggroup.com/p ... oard-guide HLG still has it buried on the bottom . wiring like this on the 320h-c2100b would run 4 boards at roughly 1050ma each... you get the voltage you need because of two boards in series bumps ya over the 72V... but then parallel two in a string would divide the 2100 between the 2 boards in a string..

keep asking questions keep digging thru older posts.. pretty much any info you could need is buried here.... somewhere

BLESSINGS!!!