Will it automaticly stop charging once it is fully charged? If not, what accessory should I get to make it stop charging?

The battery doesn't have an internal mechanism to stop the inflow of charging power. I use a Schumacher 100 Amp digital (smart) charger for charging on the grid and a Sunforce 30Amp digital charge controller for off grid (solar) charging. They charge at a high rate when the batteries are low and slow to a trickle when maintenance level is reached. My system has 4 ea. 125AHr Vmaxtanks.

How long at max draw (125 amps an hour) does it take for this battery to rundown to the 50% level with no charge input

Amp hours are a measure of power. Theoretically, the battery should provide 125 amps for one hour at the stated 12 volts. However, at this high a current, I wouldn't count on it. More realistically, the battery should provide 10 amps at 12 volts for 12.5 hours or 20 amps for 6.25 hours...and so on and so forth. My experience is limited because I use them (two of them) along with an inverter to run a refrigerator and a few other pieces of equipment in a back up mode. They have done great when I've needed them!

What is the recommended depth of discharge for this battery?

Not sure I just have it hooked up to my solar panels and it never past 12.3v

just charge to 100%. Volt meter now shows that it is loosing a charge...down 15% in three minutes and continuing to slide. Do I need to do something?

Your battery made need to be replaced if it can’t hod a charge.

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🔋 Power your future with military-grade reliability and eco-smart versatility!

PORTABLE READY - Compact Group 31 size with a convenient carrying strap for easy transport and installation.
MAINTENANCE FREE AGM TECH - 99% recombination efficiency means zero fumes and no messy upkeep.
MILITARY GRADE DURABILITY - Custom heavy-duty plates built to last through the toughest conditions.
LONG LASTING POWER RESERVE - Designed for 8 to 10 years of reliable float service life—power you can count on.
VERSATILE CHARGING OPTIONS - Seamlessly charge via AC, solar, or wind power for ultimate energy independence.

The Vmaxtanks SLR125 is a 12V 125Ah AGM deep cycle battery engineered for solar, wind, and emergency backup applications. Featuring military-grade plates and advanced AGM technology with 99% recombination, it delivers maintenance-free, long-lasting power with an 8-10 year float service life. Compact and portable, it supports multiple charging sources, making it the go-to battery for professionals demanding dependable, eco-friendly energy solutions.

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Product Dimensions	17.27 x 32.77 x 22.1 cm; 34.02 kg
Part number	SLR125
Power source type	battery-powered
Manufacturer	VMAXTANKS
Item model number	SLR125
ASIN	B004DR3IIC

Vmaxtanks SLR125 AGM 12V 125ah Battery for Solar Wind Power Emergency Backup Generator PV panel or Charger AGM 12V VMAX Battery (12 Volt 125Ah Group 31 AGM Solar Battery)

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