Sorry if this post is in the wrong place. Just installed a new DCC50s in my van. Currently have x2 Renogy LiFePo batteries, connection from my solar panels, and connection from the starter battery/alternator. The batteries aren't charging when I set the DCC50s to LI battery type, but seem to charge when I set it to SLA/Default. What am I doing wrong?
Renogy DCC50S charging issue
- Thread starter Roboto79
- Start date
Attached pictures here. Can't annotate at the moment, so bear with me on the mess of wiring. It was done by the previous owner, who had a different charger in place. I can post more detailed pictures if necessary.
Probably. Let me see what I can do. Thanks for the response.
Going to the house battery
John Frum
Tell me your problems
- Joined
- Nov 30, 2019
- Messages
- 15,233
How far away is the house battery?
Just below the charger in the picture. 2 feet at the most.
I should specify that the BVS wire is about 10' long, but the batteries are sitting just below the charger.
John Frum
Tell me your problems
- Joined
- Nov 30, 2019
- Messages
- 15,233
The bvs leads are likely not necessary and might actually be a problem.
I just looked at the charge profiles and if it was me I wouldn't have a problem with the SEALED/AGM profile
The float is a little bit high but other than that it looks good.
If you search the forums you will see many others reporting very similar problems.
I don't think a good remedy has been found.
If you find one in your search and it works please include a link to the here.
This is great insight. Thank you very much. If I find a good remedy, I will certainly post it here.
Yes. I have x3 100 watt panels connected.
John Frum
Tell me your problems
- Joined
- Nov 30, 2019
- Messages
- 15,233
Series or parralel?
They are wired in parallel.
ScottRoz
New Member
- Joined
- Sep 4, 2020
- Messages
- 6
I've been looking at this charger for our van build as well, so am following. I've also watched many of the Will Prowse videos and remember some cases where if the Lithium batteries have their own internal temperature sensors, the BMS will usually handle temperature range protection. This means that you don't need to (or perhaps should not) use the temperature sensor input on the charger.
It looks like you may be using that input. If your environment is within normal charging temperatures for the battery at minimum you could test by disconnecting that sensor in case it is not working correctly. That may explain why it seems to charge on SLA, but not Lithium. I think the temperature sensor only comes into play for Lithium, so likely the charger ignores it when set to SLA. If you have not watched, I would check out the Will Prowse review of that unit and perhaps the one where he opens up the Renogy battery to show how it works.
It looks like you may be using that input. If your environment is within normal charging temperatures for the battery at minimum you could test by disconnecting that sensor in case it is not working correctly. That may explain why it seems to charge on SLA, but not Lithium. I think the temperature sensor only comes into play for Lithium, so likely the charger ignores it when set to SLA. If you have not watched, I would check out the Will Prowse review of that unit and perhaps the one where he opens up the Renogy battery to show how it works.
John Frum
Tell me your problems
- Joined
- Nov 30, 2019
- Messages
- 15,233
The temperature sensor on the charger is for lead acid batteries.
This is helpful! Thank you. I will check out Will's videos as well.
I have the battery type set to SLA at the moment and it seems to be working, but I can try removing the temp sensor from the charger and setting it back to Lithium to make sure it's set up appropriately.
John Frum
Tell me your problems
- Joined
- Nov 30, 2019
- Messages
- 15,233
Let us know what happens.
