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Coehill@lemmy.ca Joined: 2025-03-07

I need a small solar charge controller for a 4.2V battery and a 5V solar panel. In my research, I found the SD05CRMA and the SDBK03TA 4V2.

Both use a 472 and a 1201 resistor. They both also use a CN3163 mppt lithium ion battery charge controller.

I see no other differences besides price.

Are there any benefits of one over the other in terms of physical architecture?

SDBK03TA

SD05CRMA

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
Communities need to be Retro or Retro-adjacent.
Please don't upload pornographic content. (use an external image host for that)