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VMAX SLR125 12 Volt 125Ah AGM Deep Cycle Hi Performance Battery

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Your Price: $264.99
VMAX SLR125 12V 125Ah AGM Deep Cycle Group 31 Solar Battery
Part Number: SLR125
Availability: In Stock. Free Shipping.
Quantity Price
2 - 4 $257.04
5 - 10 $249.09
11 - 15 $246.44
16+ $241.14
12-Volt 125Ah AGM Deep Cycle
High Performance Battery

Voltage: 12 Volt
Capacity(Amp Hours @20-Hr Rate): 125Ah
RC (min): 260
Energy (KWH): 1700kWH
Terminals: 8mm (included)
Dimensions (inches): 12.9"L x 6.8"W x 8.7"H
Weight: 75lb
Charging Current: 7A-35A (a smart charger is recommended)
Charging Voltage: 14.4V-14.9V
Float Voltage: 13.5V-13.8V


  • AGM Electrolyte Suspension System
  • Maintenance free Operation
  • No Dangerous Fumes or Gases
  • Fast Charge Delivery Capabilities
  • Custom Built Military Grade Alloys
  • Extremely Low Self Discharge Rate
  • Approved for Mobile, Maritime and Air Travel
  • Extreme Vibrations, Heat and Weather resistant
  • Sealed, Non-Spillable, Non Hazardous Construction
  • Maximum Power Density and Deep Cycle Capabilities

Charging Options:

  • Smart / Microprocessor controlled charger: Battery Charger Guide
  • Alternator: 14V-15V14V-15V.
  • Solar Panel: 175W-450W.
  • Charge Controller: 20A-UP

Operating Temperature Range:

  • Discharge: -4~140F
  • Charge:     14~140F
  • Storage:     -4~140F

Temperature Compensation:

  • Cycle use:     -30mV/C per Cell
  • Standby use: -20mV/C per Cell

UPC: 729440163129

BCI Group Code: 31 [(+) on L.H.S. & (-) on R.H.S)

All VMAXTANKS AGM batteries feature:

  • Sealed Construction
    The unique construction and sealing techniques of VMAX tanks guarantee leak proof operation in any position with no adverse effect to capacity or service life. VMAX tanks are classified as non-spill able, non-hazardous, dry batteries making them NOT restricted for Surface, Maritime and Air Transport.
  • Electrolyte Suspension system
    VMAX tanks utilize an electrolyte suspension system consisting AGM (Absorbed Glass Matt) of a high porosity that totally absorb and contain the electrolyte. No silica gels or any other contaminants are used.
  • Maintenance Free Operation
    There is no need to check specific gravity of the electrolyte or add water to
    VMAXTANKS™ during float service life.
  • Reliable, Rugged Construction
    The extra strong ABS container reduces case bulging and plate warping, ensuring long life and high performance.
  • Low Pressure Valve Regulated System
    VMAXTANKS™ are equipped with safety release valves, designed to operate between 0.98-196.1kpa and automatically reseal. Hence, there is never an excessive accumulation of gas within the battery.
  • Heavy Duty Military Grade Grids
    Heavy duty lead tin alloy grids provide an extra margin of performance and service life in either float or cyclic applications, even after repeated over discharges.
  • Cyclic Service Life
    VMAX is known to deliver one of the highest numbers of discharge / recharge cycles. Depending on the use and average depth of discharge it can offer an average of:

    Number Of Cycles Depth of Discharge
    300 100%
    600 75%
    900 50%
    1500 25%
    3500+ 10%
  • Float Service Life
    VMAXTANKS™ have an expected life span of 8 to 10 years in float service applications.
  • Low Self Discharge
    The self discharge rate of the new VMAX tanks at room temperature is approximately 1-2% of rated capacity per month (compared to 2-3% for most other AGM batteries and 15-20% for Lead Acid batteries).
  • Operating Temperature
    VMAXTANKS™ may be operated over a broad range of ambient temperatures.
  • Ultra Low Resistance
    VMAXTANKS™ Ultra Low Resistance make it up to 99% efficient (compared to 85-95% as in Lead Acid Batteries and 97% in most other GEL and AGM batteries).
  • Higher Power Density
    A special assembly technology is used to enhance power density to a considerable level.
Don’t settle for an average Lead Acid Battery, upgrade to a VMAX CHARGE TANK premium AGM deep cycle battery!

Customer Reviews:

5.0 out of 5 stars By far the best battery available for renewable energy systems!, August 1, 2014

"These are by far the best batteries I've worked with in over 25 years of electronic and electrical work. They come fully charged to 14.5 V.D.C. and have torqued terminal bolts instead of terminal post making wiring easy while ensuring conductivity. The life span of these batteries alone make other choices nothing more than a bad investment at 8-10 years compared to less than half that from ordinary Lead Acid Deep Cycle brands. Using military grade materials they can be cycled around 800 times and can withstand environmental stress better than the rest. They charge fast and discharge slow making them ideal for renewable energy systems such as solar and wind. If there is a down side it's the fact that they weigh around 75 lbs. so special consideration should be made when mounting them as my bank of 4 weighs in at a hefty 300 lbs. I've had my VmaxTanks for over 2 years and they work the same today as they did when I purchased them."

5.0 out of 5 stars My solar battery, September 23, 2013
Verified Purchase(What's this?)
"I am using this battery for my 200 watts solar system. I have the renogy solar panels and charge controller, also a cobra 1500 watts inverter. All these items work like a charm.

One thing that you must watch out for is that the connecting cables aren't included. I bought the cobra 4 awg cable and it fits and works like magic. Also since it's deep cycle battery, don't deep cycle it too often or else the battery will lose its efficiency. Its best to use only 25% of the 125 amp then charge it to full again.

Anyway the battery came in perfect condition and there was a charge in it already. I am planning to buy 2 more of these to increase my solar capacity."

5.0 out of 5 stars great product, September 12, 2013
Verified Purchase(What's this?)
"Love the fact that they don't need to be vented like acid batteries - well packed - have these hooked up to 2 DM 158w Monocrystalline Solar Panels - and a Exeltech XP1100 12-volt 1100 watt sine wave inverter (USA Made) combined they have been running my refrigerator for a week now - the batteries haven't run low enough to make the inverter shut down - all 3 are great products so far."

5.0 out of 5 stars Excellent Battery for Solar Panel use., June 8, 2013
Verified Purchase(What's this?)
"I use a Solar Panel for my communication equipment and need my batteries indoors. This one is safe for indoor use and has all
the power I need by using four in parallel. It works well with automatic solar controllers."

5.0 out of 5 stars A must for solar!, August 7, 2013
  Verified Purchase(What's this?)
"These batteries exceeded my expectations. Don't cheap out when setting up a solar plant. I tried some deep cell marine batteries, first, there is no comparison."

5.0 out of 5 stars Temporary Review until I have used for an entire month!, January 10, 2014
  Verified Purchase(What's this?)
"I received this battery about 3 days after I ordered it. (wow). The battery was very well packaged with styrofome packing.

Item came faster than the rest of my order.
The Battery had more than 50% charge available upon arrival.
The Battery actually looks very clean and sturdy.
The battery came with a built-in nylon handle.(thank you)

I just received the item and so far, so good. I will follow up soon

*** I am using this battery as a battery-bank-component for a solar powered shed/Generator. I was previously using a 35AH battery and that battery was working fine, but, I wanted to be more prepared for longer outages.

I would recommend.

*****UPDATE**** August 2014*******

I have been using this battery since the day it was left on my doorstep. I recently connected ONE of these batteries to a new 3000 watt inverter in conjunction with my 288 watt panel system. The Battery is still as good as the day I opened it. I will be ordering more soon, but, if they remove the free shipping, then i will settle for a local competitor. Special Shot-outs to the maker of this battery, good job."


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