navitron
 
Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address - following recent spam/hack attempts on the forum, all security is set to "high", and "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
 
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Most probably a silly Question  (Read 1355 times)
bxman
Hero Member
*****
Offline Offline

Posts: 634


« on: May 27, 2017, 05:55:08 PM »

Can any kind soul explain to me how the battery charge indicator works,
 on Sealed Lead Acid  Batteries that have a small round  window in their top face
 that  shows green when serviceable.

Many thanks
Patrick
Logged
marshman
Hero Member
*****
Offline Offline

Posts: 909


WWW
« Reply #1 on: May 27, 2017, 06:29:52 PM »

Think its a load of "balls" - literally Smiley

I think they use a tube with a coloured ball (usually green) in it . It is basically indicating the specific gravity so if the specific gravity changes, i.e. the battery is discharged then the ball sinks, when charged  the ball rises towards the top of the tube - where you view it. This gives the illusion of a coloured indicator "light". Can also indicate low electrolyte level.

Roger
Logged

3.15kWpk (15xSharp ND210)/SB3000. & 3.675kWpk (15 x Suntech 245WD)/SB4000TL, 10kW GSHP driving Wirsbo underfloor heating from 1200m ground loops. 10' x 7' solar wall (experimental). Clearview 650 Wood Burning Stove. MHRV - diy retrofit. Triple glazing.
Scruff
Hero Member
*****
Offline Offline

Posts: 1211



« Reply #2 on: May 27, 2017, 07:14:07 PM »

It doesn't.

It's a hydrometer that measures one cell only and not usually the outer cells that age faster.
Sealed batteries aren't very sealed should you want to SG test the lot.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!