Victron AGM vs GEL vs Super Cycle Batteries Compared

Lithium gets most of the attention, but Victron still sells sealed lead-acid batteries: AGM Deep Cycle, GEL Deep Cycle and the Victron AGM Super Cycle. They cost less up front, they’re happy in the cold, and they work with any charger that has a lead-acid profile. Here’s what Victron’s datasheets say about the Super Cycle range in particular, and where lead-acid still fits.

Victron AGM Super Cycle: Specs

Capacity (C20)	Weight	Size (L x W x H)	Terminals
25 Ah	6.5 kg	181 x 77 x 175 mm	M5 inserts
38 Ah	9.5 kg	267 x 77 x 175 mm	M5 inserts
100 Ah	26 kg	260 x 168 x 215 mm	M6 inserts
125 Ah	33 kg	330 x 171 x 214 mm	M8 inserts
170 Ah	45 kg	336 x 172 x 280 mm	M8 inserts
230 Ah	57 kg	532 x 207 x 226 mm	M8 inserts

Source: Victron AGM Super Cycle battery datasheet. Smaller 15Ah and 60Ah sizes are also listed.

All Super Cycle batteries are 12V sealed VRLA batteries with flat-plate AGM construction.

Cycle Life: The Number That Matters

Victron’s spec table gives the Super Cycle’s design life by depth of discharge:

300 cycles at 100% discharge
700 cycles at 60% discharge
1,000 cycles at 40% discharge

Victron says the improved chemistry resists sulfation and plate softening even after repeated full discharges, and that tests show at least 300 full cycles. That’s the selling point over standard AGM: an accidental flat battery isn’t a disaster.

AGM vs GEL vs Super Cycle

AGM Super Cycle: for frequent deep discharges, as above.
AGM Deep Cycle: Victron’s standard sealed AGM. It’s sized to sit in float or see shallower cycling.
GEL Deep Cycle: gel electrolyte. Victron’s GEL and AGM datasheet covers both ranges, with full specs.

For any of them, set your charger to the right profile. The MultiPlus-II’s default battery type is Victron Gel Deep Discharge, which Victron says also suits its AGM Deep Discharge batteries.

Who It’s For

Budget systems where upfront cost matters more than weight.
Cold sites where lithium would need heating to charge.
Standby and backup systems that mostly sit at float.

Who Should Go Lithium

Daily-cycled vans and RVs, where 300-1,000 cycles get used up fast.
Weight-sensitive builds: 100Ah of Super Cycle weighs 26 kg.

Good to Know Before You Buy

Heavy.
Fewer cycles than LiFePO4.
Usable capacity drops at high discharge rates. The 100Ah gives 82Ah at the C5 rate.

Want the source figures? The AGM Super Cycle battery page on Victron’s site has the datasheet.

Worked Example: A Weekend Trailer on AGM Super Cycle

A small trailer used for 20 weekends a year, with daily use of about 40Ah from a single 125Ah Super Cycle battery. That’s about 32% depth of discharge, below the 40% level where Victron’s design life is 1,000 cycles. At roughly 40 cycles a year (20 weekends × 2 days), the cycle rating alone would last many years (estimate; calendar ageing and temperature also matter). For this kind of light, occasional use, the lower upfront cost of AGM makes sense.

Worked Example: Comparing Usable Energy

Battery	Nominal energy	Typical usable (est.)	Weight
AGM Super Cycle 100Ah	1,200Wh	≈ 600Wh at 50% DoD	26kg
AGM Super Cycle 230Ah	2,760Wh	≈ 1,380Wh at 50% DoD	57kg
Lithium Battery Smart 12.8/100	1,280Wh	≈ 1,024Wh at 80% DoD	Lighter, see datasheet

Estimates; usable capacity depends on discharge rate and how deeply you choose to cycle. For the same usable energy, lead-acid needs roughly twice the rated capacity of lithium, which is where the weight difference comes from.

Charging Settings for Victron AGM and GEL

Victron’s chargers include presets for its lead-acid batteries. The MultiPlus-II’s default profile, Victron Gel Deep Discharge, uses 14.4V absorption, 13.8V float and 13.2V storage on 12V, and Victron says it also suits AGM Deep Discharge batteries. For the Super Cycle, check its datasheet for the recommended absorption and float values and set a matching profile in VictronConnect.

Temperature Compensation

Lead-acid batteries need lower charge voltages when warm and higher when cold. Pairing a Victron charger with a Smart Battery Sense, SmartShunt with temperature sensor or BMV-712 provides the battery’s real temperature, so the charger adjusts automatically. That’s one of the simplest ways to get the most life from AGM and GEL batteries.

Where Lead-Acid Still Shines

Cold storage and winter sites: lead-acid charges below freezing, within its datasheet limits.
Standby backup: batteries that sit at float most of the time, such as for sump pumps or communication equipment.
Starter and dual-purpose roles: larger Super Cycle sizes list cold cranking amps.
Simple systems: any charger with a lead-acid profile works.

Installation Notes

Sealed VRLA batteries can be mounted upright or on their side, depending on the datasheet, and don’t need topping up with water. Secure them firmly, since a 100Ah unit weighs 26kg, and fuse the positive cable close to the battery.

Choosing a Size

Add up your daily amp-hours and multiply by two for lead-acid, so you stay near 50% depth of discharge on a typical day. For 50Ah a day, that points to a 100Ah battery; for 100Ah a day, two 100Ah in parallel or a single 230Ah. Allow more if you want a reserve for cloudy days.

FAQ

How many cycles does the Victron AGM Super Cycle last?

300 cycles at 100% discharge, 700 at 60% and 1,000 at 40%, according to Victron.

Is the Super Cycle sealed?

Yes. It’s a sealed VRLA (valve-regulated lead-acid) battery.

Can I use it as a starter battery?

Victron lists cold cranking amps for the larger sizes, such as 500A for the 100Ah, but it’s designed as a deep-cycle battery.

Can I mix a new AGM with an older one?

Batteries in a bank should be the same type, capacity and age, so replacing the whole bank together is the usual approach.

Do AGM batteries need a special charger?

Any charger with an AGM or GEL profile works. Victron’s Blue Smart, Smart IP43 and MultiPlus chargers all include suitable presets.

Sources: Victron AGM Super Cycle battery product page; Datasheet AGM Super Cycle battery; Datasheet GEL and AGM Batteries; MultiPlus-II 2x120V manual (configuration), victronenergy.com, accessed Oct 2026.