Comments on: DIY 54Vdc 30A Battery Bulk Charger – Mk 2 http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/ How can we build it? Mon, 27 May 2019 21:39:44 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: DrGus http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/comment-page-1/#comment-41 Mon, 27 May 2019 21:28:46 +0000 http://think.gusius.com/?p=894#comment-41 In reply to DrGus.

EDIT: The trimpot closest to the input also happens to set a LV cutoff on my unit….

]]> By: DrGus http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/comment-page-1/#comment-40 Mon, 27 May 2019 21:24:17 +0000 http://think.gusius.com/?p=894#comment-40 In reply to John Heath.

Glad to help!

]]> By: John Heath http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/comment-page-1/#comment-38 Mon, 27 May 2019 06:54:53 +0000 http://think.gusius.com/?p=894#comment-38 Appreciate your input Gus. The supplier tells me his AliExpress page is all the info I need!

]]> By: DrGus http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/comment-page-1/#comment-36 Thu, 23 May 2019 00:20:54 +0000 http://think.gusius.com/?p=894#comment-36 In reply to John Heath.

Hi mate good stuff. Ok the 3 trimpots work as follows:

Trimpot 1: Controls Output voltage
Trimpot 2: Is a comparator feedback level. Basically you can set a current threshold to turn the blue LED on the board on and off (for say a bulk charge complete indicator).
I set this by placing a load on the output that gives me the current at which I wish to extinguish the BLUE led…then turn the pot until it just extinguishes.
Trimpot 3: Controls the output current limit

Regards
Gus

]]> By: John Heath http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/comment-page-1/#comment-35 Wed, 22 May 2019 08:50:40 +0000 http://think.gusius.com/?p=894#comment-35 Thanks. I managed to get a couple of these DC-DC converters from China but no user guide or ANY documentation. Can you help me with understanding what the three trimpots do? I’m guessing the one on the output side is voltage output set. But the others?

Tx and rgds

]]> By: DrGus http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/comment-page-1/#comment-25 Thu, 02 May 2019 21:50:14 +0000 http://think.gusius.com/?p=894#comment-25 In reply to John Heath.

The second converter was used in the original unit (mk1) to power the volt/amp meter.
As shown in my diagram here http://think.gusius.com/wp-content/uploads/2018/08/48vbulkchargermk2-768×410.jpg

This mk2 version I built uses a mains powered meter so there is no need for additional power conversion.

]]> By: John Heath http://think.gusius.com/diy-54vdc-30a-battery-bulk-charger-mk2/comment-page-1/#comment-24 Thu, 02 May 2019 13:44:28 +0000 http://think.gusius.com/?p=894#comment-24 where’s the second Dc-Dc converter in your photos and how is it wired?

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