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Vmaxtanks VMAXSLR125 AGM 12V 125Ah SLA Rechargeable Deep Cycle Battery for Use with Pv Solar Panels Smart chargers, Wind Turbines and Inverters and Backup Power (12 Volt 125Ah Group 31 AGM)

Brand: VMAX Solar

443 ratings

| 393 answered questions

Amazon's Choice for "vmaxtanks"

$319.97

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Brand	VMAX Solar
Unit Count	1 Count
Voltage	12 Volts
Reusability	Rechargeable
Item Dimensions LxWxH	6.8 x 12.9 x 8.7 inches

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12 Volt 125Ah Group 31 AGM Deep Cycle Heavy Duty Battery
Military grade custom made plates
Float service life span of 8 to 10 years
Designed for 99% recombination capabilities; no dangerous fumes or gases.

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Product Description

VMAXBATTERY, SOLARPANEL, CHARGETANK, LEAD ACID, GEL, LITHIUM, POWERSUPPLY

VMAXTANKS - Solar Series

High Performance Deep Cycle AGM Solar Batteries

VMAXTANKS Solar series is ideal for all energy storage applications. Featuring custom made military grade plates provide excellent deep cycle capabilities for reliable energy storage. VMAX Charge Tanks are built to withstand the most demanding applications. Whether for daily use or emergency power back up, VMAX Solar series is designed to withstand repeated cycles yet stay charged with minimum self discharge in standby power back up modes.

VMAX CHARGE TANKS. Tough Batteries for Tough Applications.

VMAXTANKS AGM Batteries are:

Sealed: Leak proof operation in any position with no adverse effect to capacity or service life.
Maintenance Free: There is no need to check specific gravity of the electrolyte or add water.
Heavy Duty: Heavy duty plates provide an extra margin of performance and service life.
Long Lasting: VMAX are known to deliver one of the highest numbers of discharge / recharge cycles.


	SLR60	SLR85	SLR100	SLR125	SLR155	SLR200
Nominal Voltage	12V	12V	12V	12V	12V	12V
Amp Hours	60Ah	85Ah	100Ah	125Ah	155Ah	200Ah
Dimensions	9.2"w x 5.5"d x 8.2"h	10.2"w x 6.6"d x 8.5"h	12.1"w x 6.7"d x 8.2"h	12.9"w x 6.8"d x 8.7"h	13.5"w x 6.8"d x 11.3"h	19.1"w x 6.8"d x 9.5"h
Weight	43 LBS	55 LBS	68 LBS	75 LBS	90 LBS	112 LBS
BCI Group Code	22NF	24	27	31	GC12	4D
Reserve Capacity (min)	135	190	220	260	350	460
Sealed (Maintenance Free)	✓	✓	✓	✓	✓	✓
Energy (kWh)	0.80	1.150	1.350	1.700	2.100	2.660

CHARGE CONTROLLER, DC, LIGHTS, CAMPING, BACKUP, HEATER, USB, FAN, POWER SUPPLY

Technical Details

Manufacturer

‎VMAXTANKS

Brand

‎VMAX Solar

Item Weight

‎75 pounds

Product Dimensions

‎6.8 x 12.9 x 8.7 inches

Item model number

‎VMAXSLR125

Is Discontinued By Manufacturer

‎No

Manufacturer Part Number

‎VMAXSLR125

Voltage

‎12 Volts

Additional Information

ASIN

B00ACNO2AO

Customer Reviews

443 ratings

4.6 out of 5 stars

Date First Available

November 24, 2012

Warranty & Support

Product Warranty: For warranty information about this product, please click here. [PDF ]

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Customer reviews

5 star		80%
4 star		10%
3 star		5%
2 star		1%
1 star		4%

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Steve

Batteries work great!

Reviewed in the United States on January 30, 2019

Verified Purchase

Just got my 3 batteries installed with 500W of solar. Everything is working perfectly. Batteries arrived at about 90% charged, and I didn't use them until the solar was all hooked up and the charge reached 100%. I'm very happy with these. If I have any trouble in the future, I'll update!

EDIT: Almost six months in, and these are still working great! I've had no issues whatsoever. I run our entire tiny house off of these batteries. That's enough to run our lights, charge our laptops, run my CPAP, 3 fans, a water pump, charge phones, and a 12v fridge. With our current power consumption, we drain about 10% overnight (with 3 of these batteries). Anyone making their own setup should calculate out their own energy consumption, but I just wanted to give a reference point. I love these batteries. I'm very happy with them. I set them up and haven't had to mess with them one time. Again, if any issues ever arise, I'll update.

65 people found this helpful

Helpful

Jesse L Boring

EDIT: Four Years In Batteries Are Performing Well. Beware of Counting On The One Year Warranty

Reviewed in the United States on January 13, 2018

Verified Purchase

EDIT 3/31/21: I wanted to update this review again (changing my three star rating from 3/19 to a four star rating this time) based on the past two years of use (four years total) in my off-grid PV setup. The batteries have continued to deteriorate only slightly over the past two year which fits with their performance once I altered my charging practices (see below for details). At this point I feel certain that the initial drop-off in performance was my fault because I wasn't charging them sufficiently in the first year which reduced their max capacity permanently. They're currently at around 40-50% capacity after four years of consistent off-grid use and I'll probably replace them pretty soon. When I do, despite my sub-optimal experience with customer service (see my initial review), I'll very likely get another set of these since they've held up so well after that initial year of undercharging and because it will make setting up the new battery bank easier.

EDIT 3/10/19: I wanted to update this review (and change my one star rating to a three star rating) because my experiences in the past year make me think my original review was too harsh. The negative that hasn't changed is that I think the seller's warranty is misleading and that the customer service rep was generating reasons not to honor the warranty. That being said, I do think that the company was right that the batteries weren't defective, I wasn't charging them the way they should have been charged. After the return was refused I decided to try charging the batteries much more aggressively (increasing absorption and float voltage and going for three hours of absorb per day rather than one hour) and I also split the battery bank in half and put each half on a desulfator for a month. The combo worked to increase the banks capacity back up to about 60-70% of the original capacity and I haven't seen much more deterioration in capacity since then (I'm also using an onboard desulfator now). So, it's hard for me to say how much of the original deterioration was the battery's fault vs. my own mistakes but I know I was at least part (and likely most of) the problem. If I had it to do again I probably would have gone with a more mainstream off-grid battery brand and with 6V batteries instead of 12V (apparently the plates are typically thicker on 6v batteries which makes the effects of sulfation occur more slowly) but I think proper charging would have prevented the issues I had my first year with the VMAX batteries. Hope the update is helpful, especially for people looking for batteries for off-grid applications.

ORIGINAL REVIEW:
I bought 8 of these batteries to create 24 volt 500 AH off-grid battery bank for my 1200W PV array. When I bought them I thought "Well, they're expensive but they have that 1 year warranty so there really isn't any risk involved if they don't perform well within that first year." I figured that the company must be very confident in their batteries to have the one year warranty (since a lot can happen to batteries in a year) and so I felt comfortable buying them. The first six months all was well but after that their capacity started dropping very quickly. I was using them to about 30-50% depth of discharge overnight and they got to an absorption charge probably 5 days out of the week. By eleven months they were performing at about 35-40% capacity of their original capacity. I expected some drop off but based on the manufacturer's "Depth of Discharge vs. Cycles" charge I expected that at 50% depth of discharge I'd still be about 60% capacity for 1000 cycles (so something like 3 years of use). So, I decided to send them back, thinking "well, as much as it's a pain to disassemble the battery bank and ship them at the cost of several hundred dollars, at least I won't feel so bad about the return on investment. However, when I called Bargainshore to confirm the exchange it became clear very quickly that they were looking for any excuse to refuse the exchange. For example, the rep asked about the max amps of my charge controller and when I said 60 he jumped on that as being too low. I reminded him that he couldn't possibly know if 60 amps was too low since he never asked about the voltage of my battery bank (since watts = amps x volts it makes no sense to just ask about amps). If I hadn't known about Ohms law he would have used that as the reason to refuse the exchange. So then he asked me to keep describing my setup and when I said that the bank wasn't charged to capacity every single night he immediately jumped on that as a reason to refuse the exchange and kept repeating that the batteries had performed as expected (which is crazy since their data sheet says that even at 100% depth of discharge the batteries will have 60% capacity at 300 cycles).

I expected these batteries to last for 3 or 4 years given their usage and they've lasted less than a year. The seller wouldn't honor their warranty. When I replace them I am absolutely going to go with a different company. I hope my experience is helpful to others.

197 people found this helpful

Helpful

J. Boenisch

3 Years in off-road Van

Reviewed in the United States on October 12, 2019

Verified Purchase

2 batteries for 3 years on board a camper van and they are finally starting to give out. We have not been nice to these batteries. They are utilized 100% off-grid and mostly off-road, attached to 320watts of solar in Oregon. It’s not really sunny here if you didn’t know that. We’ve stored them underneath the van, outside on a tray.

In short. We do not treat these batteries well, but they keep on ticking. They have been cycled over and over and drained below the 11.7 amp threshold multiple times. Had them in -0 temperature multiple times in Wyoming and Colorado. They are finally starting to show wear, not holding a charge like they used to. I can’t find room to complain. I just looked underneath and they are caked with mud and covered in grime from streams, dirt roads, you name it.

I’m going to replace them with the same. The cost of lithium is still a little too high and these batteries work hard. If I can get another 3 years, that’s over $1k for 6 years of service. Maybe by then, Lithium prices will have come to their senses.

20 people found this helpful

Helpful

Steve Anderson

Amazing battery!

Reviewed in the United States on October 11, 2017

Verified Purchase

Amazing battery! I've been using two of these for 2 years now on our camper with a modest 200W solar setup. I love the capacity and the price + FREE SHIPPING! I also read that AGM batteries charge faster than standard batteries, but I really didn't believe it as I figured charging rate must be dictated by the device charging them rather than the battery itself, but I'm starting to think what I read is right. They seem to fully recharge faster than the standard RV deep cycle batteries I've used before. Not exactly the most scientific review at this point, just a gut feeling but so far that is good enough for me.

36 people found this helpful

Helpful

L-vi

This battery is crazy dense which makes me feel like it has a tremendous storage capacity

Reviewed in the United States on May 23, 2018

Verified Purchase

This battery is crazy dense which makes me feel like it has a tremendous storage capacity. I jump started a 10 cylinder ford E450 with it which felt pretty impressive. I hooked it up to a solar panel. Basically I have absolutely no reason not to give it 5 stars, it's done everything I've tried to do with it and it's maintenance free :)

27 people found this helpful

Helpful

Docsarvis

Solid product with GREAT customer support

Reviewed in the United States on August 17, 2020

Verified Purchase

This is a REAL review. I never review products before using them for a substantial amount of time.

Used this in my travel trailer off grid for 4 straight days. It is a solid powerful battery that REALLY delivers 125 amp hours. Towed it for 4 hours and it was fully recharged. Then spent 3 more days off grid. I watched my amp draw carefully but this battery delivers what it promises. Plenty of juice for the fan, lights, charging my phone and even my WIFI antenna. Never dropped below 60% charge. It is heavy! But it is TRUE. I had a question on Friday night at 6:00 PM. Called Vmaxtanks support. They answered without waiting. Answered my questions expertly with no "fluff". Everything about this product and company is TRUE. How refreshing! USA company. Highly recommended.

7 people found this helpful

Helpful

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Vmaxtanks VMAXSLR125 AGM 12V 125Ah SLA Rechargeable Deep Cycle Battery for Use with Pv Solar Panels Smart chargers, Wind Turbines and Inverters and Backup Power (12 Volt 125Ah Group 31 AGM)

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Product Description

VMAXTANKS - Solar Series

High Performance Deep Cycle AGM Solar Batteries

VMAX CHARGE TANKS. Tough Batteries for Tough Applications.

VMAXTANKS AGM Batteries are:

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Warranty & Support

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