The Renogy Deep Cycle AGM Battery 12V 100Ah 4-Pack assembles a 400Ah, 12V battery bank from four sealed absorbed glass mat (AGM) batteries. AGM is a mature, well-understood chemistry: no watering, no external venting hardware to plumb, and dependable discharge performance in temperatures down to -4°F, per Renogy. This 4-pack matches Renogy's documented parallel limit of four batteries, so it arrives as a complete, matched 12V bank.
Who This Is For
This pack suits budget-conscious off-grid and backup systems where weight is not the deciding factor: RV house banks, hunting camps and cabins, solar storage for sheds and outbuildings, and standby power that spends most of its life on float charge. The 100Ah case size also keeps each unit at 63.9 lb — heavy, but manageable for one strong person or an easy two-person carry, unlike larger monoblock batteries. If you want panels and batteries in one order, see the Renogy 400W solar kit with two 100Ah AGM 2-packs.
Key Features
- 400Ah of combined capacity from four 12V 100Ah AGM batteries (rated at the 10-hour rate to 10.5V, per Renogy)
- Sealed, low-maintenance design, per Renogy — no watering or electrolyte checks
- 500 cycles at 50% depth of discharge, per Renogy
- Self-discharge below 3% per month at 77°F, per Renogy — suited to seasonal and standby duty
- 1,100A maximum discharge current (5 seconds) per battery for motor-starting and surge loads
- Discharge rated from -4°F to 140°F — cold-weather discharge without heaters or electronics
- Supports series connection and parallel connection up to 4 batteries, per Renogy
Why Renogy
Renogy has supplied batteries and solar equipment to the US off-grid market for over a decade, and publishes the manuals, spec sheets, and warranty terms behind its ratings. These AGM batteries carry a 2-year prorated material and workmanship warranty, and OffGrid Horizon is an authorized Renogy dealer, so your coverage is valid from day one.
Specifications
| SKU |
RNG-BATT-AGM12-100x4-US |
| Chemistry |
AGM lead-acid, sealed |
| Nominal voltage |
12V |
| Rated capacity |
100Ah per battery (10-hour rate to 10.5V); 400Ah total (4 in parallel) |
| Cycle life |
500 cycles at 50% depth of discharge, per Renogy |
| Max continuous charge current |
30A per battery |
| Max discharge current |
1,100A for 5 seconds, per battery |
| Self-discharge |
Less than 3% per month at 77°F, per Renogy |
| Charge temperature range |
32°F to 122°F |
| Discharge temperature range |
-4°F to 140°F |
| Storage temperature range |
-4°F to 140°F |
| Case material |
ABS |
| Dimensions (per battery) |
13.1 x 6.9 x 8.6 in |
| Weight |
63.9 lb per battery; approx. 255.6 lb total |
| Connections |
Series supported; parallel up to 4 batteries, per Renogy |
| What's included |
4 x 12V 100Ah AGM battery, each with 2 terminal bolts |
| Warranty |
2-year prorated material and workmanship warranty, per Renogy |
| Documentation |
Renogy 12V Deep Cycle AGM user manual (PDF) |
AGM or Lithium? An Honest Comparison
Both chemistries have earned their place, and the right answer depends on how you will use the bank.
Where AGM makes sense: lower upfront cost per battery; discharge rated to -4°F with no heaters or battery management electronics involved; tolerant of float/standby duty; a long track record in RV, marine, and backup service. For a system that sits ready most of the year and cycles occasionally, AGM is a sound, economical choice.
Where lithium makes sense: Renogy rates its CORE LiFePO4 batteries at 5,000 cycles at 80% depth of discharge versus 500 cycles at 50% for these AGMs — that is more cycles and roughly 80% usable capacity versus the ~50% commonly planned for lead-acid. Lithium is also lighter per usable amp-hour. The trade-offs are higher upfront cost and the need for heating (such as CORE's self-heating function) to charge below freezing.
In short: daily deep cycling and weight-sensitive builds favor lithium; standby duty, cold-discharge applications, and tighter upfront budgets favor AGM.
Warranty & Support
Renogy covers these batteries with a 2-year prorated material and workmanship warranty (see Renogy's warranty terms). OffGrid Horizon is a family-owned authorized Renogy dealer — call (302) 496-3554 and a real person will help with sizing, troubleshooting, or a warranty claim.
Shipping
At roughly 256 lb of batteries, this 4-pack ships within the US by LTL freight on a pallet. The carrier will typically call ahead to schedule a curbside delivery. Before signing the delivery receipt, count the packages and inspect for damage — note any dents, leaks, or crushed packaging on the receipt, or refuse the damaged piece, so your claim options stay intact.
Frequently Asked Questions
Do these batteries need venting or maintenance?
Renogy describes them as sealed and low-maintenance — there is no watering or electrolyte service. Follow the user manual's guidance on installation orientation and enclosure clearances; Renogy advises keeping them upright and not placing them upside down.
How much of the 400Ah is usable?
Renogy rates cycle life at 50% depth of discharge, so most system designers plan around roughly 200Ah usable from this bank to preserve battery life. Deeper discharges are possible but shorten cycle life.
Can I add more batteries later?
In parallel, no — Renogy's documented limit is 4 in parallel, and this pack is already there. Series connection is supported, so the same batteries can be arranged for 24V or 48V systems instead.
What charger should I use?
Use a charger or charge controller with an AGM profile, and stay within the 30A maximum continuous charge current per battery (up to 120A across the parallel bank).
How should I store them in the off-season?
Store fully charged in a dry, cool place and recharge about every three months, per Renogy's care guidance. Self-discharge is under 3% per month at 77°F.
Will they work in freezing weather?
Discharge is rated from -4°F to 140°F, so they will deliver power in the cold. Charging is rated from 32°F to 122°F, so plan charging while the bank is above freezing.
Not sure whether AGM or lithium fits your system? Call OffGrid Horizon at (302) 496-3554 — we are a family-owned authorized Renogy dealer and will give you a straight answer, or browse our Renogy collection.
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