EcoRenovator  

Go Back   EcoRenovator > Improvements > Solar Power
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 12-09-18, 03:08 AM   #1
Haglun
Lurking Renovator
 
Join Date: Dec 2018
Location: Japan
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Default Can you safely use a motorbike 12V GEL battery in a PV system ?

Eventually, my goal is to build IoT functionalities on top of it, using micro controllers. This way I will be able to monitor the PV, battery and control loads from a web app. I can do a few things in IoT, but I am a complete beginner in PV systems.

For the moment, the cheapest parts I found are the following:
- 18v, 85 watts solar panel
- 12v GEL battery (Motorcycle GSYUASA GETX9-BS from Rakuten - can't post URLs yet)
- PWM charge controller (AP-OT-002 from amazon - can't post URLs yet)

I suspect that the system will be pretty inefficient. I also know that the battery is insufficient to store all the electricity i can get from the solar panel. It is ok, my goal is to get a first experience and and the focus is on implementing IoT.
But I have the following question:

Is it safe to use the GEL battery to charge home appliances (using a 12v-5v DC converter) ?
I read that the GEL batteries are safe because they do not reject Hydrogen. But the battery manual says that the battery may reject hydrogen, and advises not to use it for any other purpose than engine starting.

Please tell me about any potential risks of using such a battery to store the PV generated electricity and charge small appliances (I will connect it to a 12 to 5V DC converter). Also, I have a lot to learn about PV systems, so I'm interested in any other remark you have.

Haglun is offline   Reply With Quote
Old 12-09-18, 10:24 AM   #2
jjackstone
Helper EcoRenovator
 
Join Date: Mar 2009
Location: Sacramento,Ca
Posts: 64
Thanks: 2
Thanked 21 Times in 15 Posts
Default

Shouldn't be a problem. My company used to use small gel cells all the time as backup power for small electronic systems. If there was out gassing from the battery it would more likely come from being over-charged than discharged.

I assume by small appliances you are talking about things like cell phones, tablets...etc. Motorcycle batteries aren't made for long term discharge so I would only use it for something that doesn't bring the voltage down too much. Try it out and let us know how it works for you,
JJ
jjackstone is offline   Reply With Quote
Old 12-09-18, 08:17 PM   #3
oil pan 4
Land owner
 
Join Date: Nov 2012
Location: NM
Posts: 956
Thanks: 12
Thanked 112 Times in 95 Posts
Default

It won't last very long.
It's a starting gel battery. Just about the worst battery you could pick.
If the charge controller ever tried to run an equalization cycle the battery would be toast.

oil pan 4 is offline   Reply With Quote
Reply


Tags
battery, safety, solar panel

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 10:06 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design