---
product_id: 1746316
title: "VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels"
brand: "vmax usa"
price: "€ 1344.95"
currency: EUR
in_stock: true
reviews_count: 4
category: "Vmax Usa"
url: https://www.desertcart.hr/products/1746316-vmaxtanks-slr125-solar-battery-12-volt-125ah-group-31-battery
store_origin: HR
region: Croatia
---

# 12V heavy-duty power 125Ah high capacity Military-grade AGM plates VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels

**Brand:** vmax usa
**Price:** € 1344.95
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your independence with military-grade reliability

## Quick Answers

- **What is this?** VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels by vmax usa
- **How much does it cost?** € 1344.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/1746316-vmaxtanks-slr125-solar-battery-12-volt-125ah-group-31-battery)

## Best For

- vmax usa enthusiasts

## Why This Product

- Trusted vmax usa brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ready for Anything:** Heavy-duty 75lb build designed for emergency backup & off-grid living
- • **Versatile Charging:** Compatible with AC, solar, and wind power sources
- • **Clean & Safe Energy:** AGM tech with 99% recombination, no fumes or spills
- • **Endurance That Outlasts:** 8-10 years float service life for long-term reliability
- • **Power Meets Portability:** Compact Group 31 size with convenient carrying strap

## Overview

The VMAXTANKS SLR125 is a 12V, 125Ah AGM deep cycle battery engineered for solar, wind, and emergency backup applications. Featuring military-grade custom plates and 99% recombination technology, it delivers clean, maintenance-free power with an 8-10 year float life. Compact yet heavy-duty, it includes a carrying strap and ring terminal screws, making it ideal for professionals seeking dependable off-grid energy solutions.

## Description

desertcart.com: VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels : Automotive

Review: Solar Sailing! - I bought this as an alternative to a marine battery. It fits in a standard series 31 marine battery box. I installed it and hooked it up to an AGM charger and too it out the next day for an overnight meteor watching trip. I ran the anchor, cabin, and nav lights for several hours. We also ran the GPS overnight with an anchor alarm on. After a 12 hour trip it started the 15 HP motor vigorously and provided power all the way back to the dock. When it was hooked back on the charger I found it still had %20 capacity left. I am impressed with this and its ability to deliver a full 12V high amp current even at a low charge. I plan on purchasing another one soon to be able to do multi day trips without hitting shore. We had taken a spare old deep cycle hooked to the solar panels but did not need it at all. Did I mention its a local product? Arrived to Toledo, Oh. From Midland Mi, in less than 24 hours from the time I ordered. I didn't expect to have it for the trip and was much relieved when it got to me in time to be charged up overnight. It is a heavy sucker so be ready, I have the old deep cycle in the opposite side of the boat to balance her out. Update 1 year later: I just bought battery#2 to make into a dual battery system on my sailboat. We were out sailing with a 30w solar panel and an auto pilot for 7 days and had no issues and 50% battery on day 7 60% batt1 40% batt2. We did no conservation and rarely hit shore, preferring mooring buoys and privacy. I bought my second battery direct from the sellers warehouse, with a cash discount no less. If you are in the downriver detroit area give him a call or an email. He also threw in a few freebies for driving 60 miles that were much appreicated, I will be replacing these in a few years with the new 155AH version or more, but there are great for solar storage and I have no issues in a year of use. ALSO this battery retained 90% charge in storage over winter on my garage floor. Super tough battery, I will be adding in a new dual battery meter next week then maybe post pictures of the setup.
Review: Clearly a Superior Product - Like another customer, I did my own extensive research. This is an amazing battery for the price, and free shipping to boot. I currently have primarily wet cell batteries which are extremely dangerous and a pain to transport with that given danger of spillage of sulfuric acid. I purchased an Optima battery, which is a great product itself, however its capacity seems to max out at 66AH. That, and they seem to be a little bit overpriced. These batteries solve both problems with being AGM batteries, and 125AH. I bought two and run them in parallel and they lasted a good few days powering my entire multi-media center (Power guzzling TV, 7.1 700W surround sound receiver and speakers with separately plugged in 12" sub, PS3, Modem, router, various fans, etc.). Only down side is that they are EXTREMELY heavy (about 75lbs. each). But having worked with batteries and power for a living, I understand that that is just a fact of DC life. There is no way around it! The bigger the capacity, the heavier the battery. Plus, these are dry cell (NO MAINTENANCE). These batteries are perfect for the applications they describe (solar). Like another customer mentioned, it even has its own torque recommendations. Given that I don't leave it with a float voltage or anything and move it back and forth from the solar panel system I built to the house to be hooked up to an inverter, I don't really pay much mind...but if you plan on leaving these in a stagnant location, I would definitely follow the torque recommendations to get maximum potential and efficiency from these batteries. I still can't get over the free shipping! Anyway, coming from the point of view of someone who worked with batteries and DC power for a living, these are awesome batteries.

## Features

- 12 Volt 125Ah group 31 AGM deep cycle heavy duty battery, 13"L*7"W*8.7"H; includes carrying strap
- 8mm hex screw in terminals (included,for use with ring terminals) . Military grade custom made plates
- Charge using AC, solar or wind power. Float service life span of 8 to 10 years
- AGM with 99% recombination capabilities; no dangerous fumes or gases.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004DR3IIC |
| Batteries | 1 12V batteries required. |
| Battery Capacity | 125 Amp Hours |
| Best Sellers Rank | #639,866 in Health & Household ( See Top 100 in Health & Household ) #2,381 in Automotive Replacement Batteries #5,378 in 12V Batteries |
| Brand | VMAX USA |
| Customer Reviews | 4.3 4.3 out of 5 stars (95) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 75 pounds |
| Item model number | SLR125 |
| Manufacturer | VMAXTANKS |
| Product Dimensions | 6.8"D x 12.9"W x 8.7"H |
| Size | Group 31 |
| Terminal | Ring Terminal |
| UPC | 729440163129 |

## Product Details

- **Battery Capacity:** 125 Amp Hours
- **Battery Cell Composition:** Lead-Acid, AGM
- **Brand:** VMAX USA
- **Item Weight:** 75 Pounds
- **Manufacturer:** VMAXTANKS
- **Product Dimensions:** 6.8"D x 12.9"W x 8.7"H
- **Size:** Group 31
- **Terminal:** Ring Terminal
- **Vehicle Service Type:** Scooter
- **Voltage:** 12 Volts

## Images

![VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels - Image 1](https://m.media-amazon.com/images/I/81PJMe-Gi6L.jpg)
![VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels - Image 2](https://m.media-amazon.com/images/I/51rx-hESnfL.jpg)
![VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels - Image 3](https://m.media-amazon.com/images/I/713Jf6nHkrL.jpg)

## Questions & Answers

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

**Q: 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**
A: 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!

**Q: What is the recommended depth of discharge for this battery?**
A: Not sure I just have it hooked up to my solar panels and it never past 12.3v

**Q: 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?**
A: Your battery made need to be replaced if it can’t hod a charge.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solar Sailing!
*by S***R on August 13, 2013*

I bought this as an alternative to a marine battery. It fits in a standard series 31 marine battery box. I installed it and hooked it up to an AGM charger and too it out the next day for an overnight meteor watching trip. I ran the anchor, cabin, and nav lights for several hours. We also ran the GPS overnight with an anchor alarm on. After a 12 hour trip it started the 15 HP motor vigorously and provided power all the way back to the dock. When it was hooked back on the charger I found it still had %20 capacity left. I am impressed with this and its ability to deliver a full 12V high amp current even at a low charge. I plan on purchasing another one soon to be able to do multi day trips without hitting shore. We had taken a spare old deep cycle hooked to the solar panels but did not need it at all. Did I mention its a local product? Arrived to Toledo, Oh. From Midland Mi, in less than 24 hours from the time I ordered. I didn't expect to have it for the trip and was much relieved when it got to me in time to be charged up overnight. It is a heavy sucker so be ready, I have the old deep cycle in the opposite side of the boat to balance her out. Update 1 year later: I just bought battery#2 to make into a dual battery system on my sailboat. We were out sailing with a 30w solar panel and an auto pilot for 7 days and had no issues and 50% battery on day 7 60% batt1 40% batt2. We did no conservation and rarely hit shore, preferring mooring buoys and privacy. I bought my second battery direct from the sellers warehouse, with a cash discount no less. If you are in the downriver detroit area give him a call or an email. He also threw in a few freebies for driving 60 miles that were much appreicated, I will be replacing these in a few years with the new 155AH version or more, but there are great for solar storage and I have no issues in a year of use. ALSO this battery retained 90% charge in storage over winter on my garage floor. Super tough battery, I will be adding in a new dual battery meter next week then maybe post pictures of the setup.

### ⭐⭐⭐⭐⭐ Clearly a Superior Product
*by E***N on May 23, 2012*

Like another customer, I did my own extensive research. This is an amazing battery for the price, and free shipping to boot. I currently have primarily wet cell batteries which are extremely dangerous and a pain to transport with that given danger of spillage of sulfuric acid. I purchased an Optima battery, which is a great product itself, however its capacity seems to max out at 66AH. That, and they seem to be a little bit overpriced. These batteries solve both problems with being AGM batteries, and 125AH. I bought two and run them in parallel and they lasted a good few days powering my entire multi-media center (Power guzzling TV, 7.1 700W surround sound receiver and speakers with separately plugged in 12" sub, PS3, Modem, router, various fans, etc.). Only down side is that they are EXTREMELY heavy (about 75lbs. each). But having worked with batteries and power for a living, I understand that that is just a fact of DC life. There is no way around it! The bigger the capacity, the heavier the battery. Plus, these are dry cell (NO MAINTENANCE). These batteries are perfect for the applications they describe (solar). Like another customer mentioned, it even has its own torque recommendations. Given that I don't leave it with a float voltage or anything and move it back and forth from the solar panel system I built to the house to be hooked up to an inverter, I don't really pay much mind...but if you plan on leaving these in a stagnant location, I would definitely follow the torque recommendations to get maximum potential and efficiency from these batteries. I still can't get over the free shipping! Anyway, coming from the point of view of someone who worked with batteries and DC power for a living, these are awesome batteries.

### ⭐⭐⭐⭐⭐ Great Batteries ! 4 years on and still going strong
*by M***N on February 2, 2016*

WOW !! I bought 6 of these batteries in July of 2012 , A Morningstar TS-MPPT-45 controller and two 280 watt solar panels . 4 years later these batteries are still going strong. I use them in the summer time to power 4 Dell severs and 3 NAS devices for 4 hours each day and they perform flawlessly . Even after the charge controller had an issue and the batteries dipped to 11.00v on some days and and also were overcharged at to 15.5v these batteries perform well and are as good as new. Morningstar are also awesome and replaced the faulty controller and all is well . However If i had to do it again Id shell out a few more bucks and get the TS-MPPT60 as it has the built in Ethernet . Being able to get the email alerts and be able to monitor charge state over the internet is priceless. 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) Can you believe it ... still going well after 6 years !!

## Frequently Bought Together

- VMAXTANKS SLR125 Solar Battery 12 Volt 125Ah Group 31 Battery for Solar Wind Sump Pump Emergency Backup Generators and PV panels
- Qty2: VMAX SLR125 AGM Sealed Deep Cycle 12V 125Ah Batteries for Use with Pv Solar Panels, Wind Turbine and Inverters

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-02*