PRODUCT DETAILS
The Go Power! GP-AGM-100-12V is a sealed 12-volt, 100Ah (BCI Group 31) AGM deep-cycle battery for RV, marine and off-grid solar storage. Absorbent-glass-mat construction means no watering, no venting and no spills in any mounting position; it is rated for about 1,100 cycles at 50% depth of discharge, charges from any standard AGM-profile controller or converter, and weighs 67.5 lb. Backed by Go Power!'s North American support team (part of Dometic).
Built to the standard RV manufacturers install
Go Power! has designed mobile power since 1996 and is the battery and inverter brand fitted at the factory by Jayco, Forest River, Thor and other leading RV builders. Sun Cycle® AGM batteries are the deep-cycle lead-acid option in that line: valve-regulated, vibration-resistant and maintenance-free, built for the charge/discharge duty of a house bank rather than engine starting. Part of Dometic.
Sealed, maintenance-free, mount anywhere
The electrolyte is held in glass-mat separators, so there is nothing to top up and nothing to leak. Install upright or on its side in an unvented compartment, and expect less than 3% self-discharge per month — up to six months in storage before it needs a freshening charge.
Pairs with your existing charging
Charge at 14.4–15.0 V cycle; 13.5–13.8 V float (at 25°C). Any Go Power! or Dometic solar controller, the AIC inverter/charger, or your RV's converter on its AGM setting will do; keep initial charge current under 30A for best life. Size your solar to put back what you use daily and avoid sitting below 50% charge.
When AGM is still the right call
AGM is the lowest-cost way to replace a tired lead-acid bank without changing your converter or charge controller: it charges on the same 14.4V profile, bolts into the same Group 31 tray, and tolerates the occasional deep discharge better than flooded cells. If you are rebuilding the whole system, compare the 100Ah Advanced Lithium — twice the usable energy at less than half the weight, with three times the cycle life.
FEATURES
- 12V 100Ah deep-cycle AGM — BCI Group 31.
- Sealed VRLA, maintenance-free — no watering, no venting, no spills; mount upright or on its side.
- Cycle life — ~250 @ 100% DoD / ~1,100 @ 50% DoD / ~2,250 @ 30% DoD.
- Vibration resistant — glass-mat construction built for RV, marine and off-road duty.
- Low self-discharge — under 3% per month; store up to 6 months between charges.
- Standard AGM charge profile — works with any Go Power!/Dometic controller, converter or inverter/charger.
- 620 CCA, 1,200 A (5 s) max discharge — ample surge for inverter start-ups.
- T14 (M8), torque 11–14.7 Nm terminals; ABS case.
- Backed by Go Power!'s North American support team (part of Dometic).
WHAT IT RUNS
Approximate runtimes from one 100Ah AGM battery discharged to 50%, assuming ≈540Wh usable and 90% inverter efficiency for AC loads. Real-world results depend on temperature, load pattern and how fully you recharge. Add solar or shore charging to extend any of these.
| Load | Typical draw | Runtime on one battery |
|---|---|---|
| LED lighting (whole RV) | 20W | ≈ 27 hrs |
| CPAP (no humidifier) | 40W | ≈ 14 hrs |
| Laptop charger | 65W | ≈ 8 hrs |
| 32" TV + streaming box | 80W | ≈ 7 hrs |
| 12V compressor fridge (average draw) | 50W | ≈ 11 hrs |
| 12 cu ft residential fridge via inverter | 150W | ≈ 4 hrs |
| Furnace blower (propane furnace) | 90W | ≈ 6 hrs |
| Drip coffee maker via inverter | 900W | ≈ 36 min (≈ 4 pots) |
| RV microwave via inverter | 1000W | ≈ 32 min (3–6 uses) |
SPECIFICATIONS
- Length:
- Width:
- Height:
- Weight:
| Model / SKU | GP-AGM-100-12V / 76285 |
|---|---|
| Chemistry | AGM (absorbent glass mat) VRLA lead-acid, deep cycle |
| Nominal Voltage | 12 V |
| Rated Capacity (20 hr) | 100 Ah |
| Capacity at other rates | 110 Ah (100 hr) / 95.2 Ah (10 hr) / 83 Ah (5 hr) |
| Cycle Life (25°C) | ~250 @ 100% DoD / ~1,100 @ 50% DoD / ~2,250 @ 30% DoD |
| Charge Voltage | 14.4–15.0 V cycle; 13.5–13.8 V float (at 25°C) |
| Charge Current | 30 A initial (cycle use) |
| Max Discharge Current | 1,200 A (5 s) |
| Cold Cranking Amps | 620 |
| Internal Resistance | ≈4.9 mΩ |
| Self-Discharge | <3% per month at 25°C; freshening charge within 6 months |
| Operating Temperature | Discharge/storage -20°C to 60°C; charge -20°C to 50°C |
| Terminals | T14 (M8), torque 11–14.7 Nm |
| Group Size | BCI Group 31 |
| Dimensions (L×W×H) | 12.01 × 6.61 × 8.15 in (9.02 in to terminal top) |
| Weight | 67.5 lb (30.6 kg) |
| Case | ABS |
| Certifications | UL Recognized component (MH29024); CE; IEC 60896-21/22 |
COMPARE MODELS
| Battery | Chemistry | Energy | Cycle life | Weight | Smart features | Warranty | Best for |
|---|---|---|---|---|---|---|---|
| 100Ah Advanced Lithium | LiFePO4 | 1,280Wh (≈100% usable) | 3,000 | 28.7 lb | Bluetooth, RV-C/PowerTrak™, self-heating | 10 yr pro-rated | Most RVs and vans; the drop-in upgrade from AGM |
| 300Ah Advanced Lithium | LiFePO4 | 3,840Wh (≈100% usable) | 3,000 | 70.5 lb | Bluetooth, RV-C/PowerTrak™, self-heating | 10 yr pro-rated | Inverter-heavy coaches, residential fridge, A/C with soft-start |
| 100Ah AGM (Group 31) (this battery) | AGM lead-acid | 1,200Wh (≈50% usable) | 1,100 @ 50% DoD | 67.5 lb | — | — | Budget replacement for an existing AGM/flooded bank |
| 6V 225Ah AGM (GC2, pair for 12V) | AGM lead-acid | 2,700Wh per pair (≈50% usable) | 650 @ 50% DoD | 70.5 lb each | — | — | Golf-cart-format house banks, outlet price |
MANUALS, SAFETY INFORMATION AND DOWNLOADS
ACCESSORIES
FAQ
How much of a 100Ah AGM battery can I actually use?
Plan on 50%. Lead-acid cycle life falls off steeply below half charge, so a 12V 100Ah AGM gives you about 600Wh of everyday usable energy — roughly 1,100 cycles at that depth versus 250 if you run it flat each time.
Do I need a special charger for AGM?
No. Any solar controller, converter or inverter/charger with an AGM or sealed lead-acid setting works: 14.4–14.8V absorption and 13.5–13.8V float at 25°C, with temperature compensation if available. Avoid flooded/equalize settings above 15V, which will vent and dry out an AGM.
AGM or lithium — which should I buy?
AGM is the lower upfront cost and charges on the equipment you already have. Lithium costs more per battery but gives roughly twice the usable energy, a third of the weight, three times the cycle life and a 10-year warranty, and it needs a lithium charge profile. If you are replacing one or two batteries in an otherwise standard RV, AGM is a sensible choice; if you are building a system around an inverter or going off-grid regularly, the 100Ah Advanced Lithium pays back in weight and lifespan.
Will it fit where my old battery was?
It is a standard BCI Group 31 case (12.01 × 6.61 × 8.15 in, 9.02 in to the top of the terminals) with T14/M8 threaded posts, so it drops into the Group 31 tray most RVs and boats use.
Can I mount it on its side or inside the RV?
Yes. As a sealed valve-regulated battery it can be mounted upright or on its side (not inverted) and does not need a vented compartment under normal charging. Keep it out of direct heat and leave room around the terminals.
How long will it last?
Cycle life depends on depth of discharge: ~250 @ 100% DoD / ~1,100 @ 50% DoD / ~2,250 @ 30% DoD at 25°C. In typical weekend RV use, cycled to around 50%, expect four to six seasons; keeping it above 50% and fully recharging after each trip is the biggest factor.
Does it need maintenance?
No watering or specific-gravity checks. Keep the terminals clean and tight, recharge fully after use, and give it a freshening charge if it sits more than six months (sooner in hot storage).
Is Go Power! the battery installed in my RV from the factory?
Very likely, if your coach is a Jayco, Forest River, Thor or many other brands. Go Power! has supplied RV manufacturers since 1996 and its Sun Cycle® batteries are specified across those lines, so this is a like-for-like replacement.
What's the warranty and who do I call for support?
Go Power! warrants its batteries against defects in materials and workmanship for the product's warranty period, backed by a North American support team (part of Dometic). Register your product after purchase; support is available by phone and email.