Remove float charge for device

I have two deep cycle batteries in my trailer being fed by two 400 WATT solar panel. My problem is that I think the float charge is elevating my 12VDC system beyond 13.8 VDC. Most normal bulb lights work fine, but my LED bulbs won't work; neither will my USB charging hub with a 12VDC input voltage. I suspect the excessive voltage may be causing the issues with the electronic LEDs and USB hub charger.

Question 1: If I wanted to reduce the voltage to 12VDC over the circuit for just these devices how would I do that? Diode I am assuming? The LEDs are 5WATT and the USB can run between 1.5 to 5 AMPS.

Question 2: Is it possible this is some type of grounding issue instead? I basically have the power and ground coming directly from battery...

Any feedback would be appreciated! jim

by Jbeauchemin
October 10, 2019

Anyone out there up for this challenge? :-)

by Jbeauchemin
October 11, 2019

No Answers

No answers yet. Contribute your answer below!


Your Answer

You must log in or create an account (free!) to answer a question.

Log in Create an account


Go Ad-Free. Activate your CircuitLab membership. No more ads. Save unlimited circuits. Run unlimited simulations.

Search Questions & Answers


Ask a Question

Anyone can ask a question.

Did you already search (see above) to see if a similar question has already been answered? If you can't find the answer, you may ask a question.


About This Site

CircuitLab's Q&A site is a FREE questions and answers forum for electronics and electrical engineering students, hobbyists, and professionals.

We encourage you to use our built-in schematic & simulation software to add more detail to your questions and answers.

Acceptable Questions:

  • Concept or theory questions
  • Practical engineering questions
  • “Homework” questions
  • Software/hardware intersection
  • Best practices
  • Design choices & component selection
  • Troubleshooting

Unacceptable Questions:

  • Non-English language content
  • Non-question discussion
  • Non-electronics questions
  • Vendor-specific topics
  • Pure software questions
  • CircuitLab software support

Please respect that there are both seasoned experts and total newbies here: please be nice, be constructive, and be specific!

About CircuitLab

CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.