How long can my SLA battery last?

[stanly]

Hi, I got few question to ask.

1. Normally how long is SLA battery life span? Some said 3 yrs but manufacturer told me is 5 yrs. (I use 10hrs per day)

2. I got a 12v 12AH SLA battery and I need to power 6x12V(2.4Watt) LED strips for 10hrs per day, is it possible?


Please advise.

[Mike90250]

6 ea, 2.4W LEDs = 14.4w x 10 hr = 144wh

144wh / 12V = 12AH

This load would completely drain your battery, and it would die after 20 cycles or so, of this abuse. the 5-10 year life, is with only discharging it 20%, with 80% capacity remaining. The deeper the discharges, the shorter the life.

[stanly]

I got include the solar charge controller in my solar set.
if I am not mistaken, the charge controller will discharge at 10% of my battery.

[Mike90250]

A solar charge controller, only controls the CHARGING of the battery

[stanly]

based from the manual

http://solarpower-mart.com/yahoo_site_admin/assets/docs/GAMMA_Solar_Charge_Controller_10A.13083702.pdf

Load disconnect 11.1V

[Mike90250]

Generally, using a load control circuit on a charge controller, is pointless, as they cut off too late.Battery_Volt_Chart.jpg Just size your system properly.

[Sunking]

To do what you want will require minimum:

• 100 watt solar panel
• 60 AH 12 volt battery
• 10 amp charge controller

Using the battery the way you are now it will not last 1-month, use it correctly and you may get 5 years out of it.