Victron Skylla-i and Skylla-IP65 Chargers Compared

The Victron Skylla-i and Skylla-IP65 are Victron’s heavy-duty, high-current battery chargers for boats, vehicles and industrial use. The Skylla-i is a 24V charger up to 100A. The Skylla-IP65 is a sealed 12V/70A or 24V/35A unit with a wide 90–265V input. Both come in versions with two or three outputs. Here’s what Victron’s datasheets say.

A Victron Skylla charger video.

Victron Skylla-i and Skylla-IP65: Specs

	Skylla-i 24/80	Skylla-i 24/100	Skylla-IP65 12/70	Skylla-IP65 24/35
AC input	185–265V (230V)	185–265V (230V)	90–265V (120/230V)	90–265V (120/230V)
DC input	180–350V	180–350V	—	—
Charge current	80A	100A	70A	35A
Absorption / float	28.8V / 27.6V	28.8V / 27.6V	14.4V / 13.8V	28.8V / 27.6V
Storage mode	26.4V	26.4V	13.2V	26.4V
Protection rating	IP21	IP21	IP65	IP65
Weight	7kg	7kg	6kg	6kg

Source: Victron Skylla-i 24V and Skylla-IP65 datasheets.

Output Versions

(1+1): one main output plus a starter-battery output, limited to about 4A on the Skylla-i and 3A on the Skylla-IP65, at a slightly lower voltage.
(3): three isolated outputs. Each can supply the full rated current, but the total output is still limited to the charger’s rating (for example 100A on the 24/100).

Features

7-stage adaptive charging for lead-acid, with variable absorption time, BatterySafe mode and a weekly refresh from storage mode.
Lithium (LiFePO4) ready: 3-stage charging with on/off control from a BMS or full CAN-bus control.
VE.Can (NMEA 2000) for synchronized parallel charging and GX monitoring. It’s galvanically isolated on the Skylla-i but not isolated on the IP65.
Temperature sensor included on the Skylla-i, and voltage sense.
Usable as a power supply.
Alarm relay (Skylla-i): 240V AC/4A.

Skylla-i or Skylla-IP65?

Skylla-i: 24V, high current, for engine rooms and equipment bays. It also accepts DC input.
Skylla-IP65: sealed for wet or dusty spaces, and it runs on 120V or 230V.

Temperature Derating

The Skylla-i delivers full current up to 40°C, falling to 80% at 50°C and 60% at 60°C.

Who It’s For

Boats with large 24V house banks and multiple battery banks.
Workboats, vehicles and industrial setups that need a rugged, high-current charger.

For smaller 12V systems, look at the Blue Smart or Phoenix Smart chargers too.

Good to Know Before You Buy

Skylla-i is 230V input only, no 120V.
Two- and three-output chargers can’t be paralleled with each other.

You can download the Skylla-i manual and datasheet from Victron Energy’s website.

Victron lists every Skylla-IP65 variant, with datasheets, on its official product page.

Worked Example: A 24V Workboat House Bank

A workboat has a 24V 400Ah AGM house bank and a 24V starter battery, plugged in at the dock overnight.

Skylla-i 24/100 (1+1): the main output recharges about 200Ah (50% of the bank) in roughly 2 hours of bulk, plus absorption, while the small second output keeps the starter battery topped up (estimate).
Skylla-i 24/80 (1+1): about 2.5 hours of bulk for the same 200Ah (estimate).
Rule of thumb check: 10–20% of 400Ah is 40–80A for AGM, so the 24/80 sits at the top of that range and the 24/100 slightly above; set a lower current limit if the battery maker recommends it.

Worked Example: Three Banks on One Charger

A 24V yacht with a house bank, a bow thruster bank and a starter battery could use a Skylla-i 24/100 (3). Each output can deliver up to the full 100A, but the total is capped at 100A. When the house bank is low and the others are nearly full, most current goes to the house bank, and the full batteries take only what they need (example, based on the datasheet’s output description).

Worked Example: Heat in an Engine Room

At 50°C, the Skylla-i is rated at 80% of its output, so a 24/100 delivers about 80A; at 60°C, about 60A (from the derating figures). If the engine room stays hot after a passage, charging will take longer until it cools.

Worked Example: The IP65 on 120V Shore Power

A US-based 12V boat on a 30A shore pedestal with a Skylla-IP65 12/70: at about 14.4V, 70A is roughly 1,000W of DC output, drawing around 9–10A of AC at 120V after losses (estimate). That leaves plenty of the 30A pedestal for other loads.

Installation Steps

Mount the Skylla vertically with clearance for airflow; the Skylla-i (IP21) in a dry space, the IP65 anywhere that’s wet or dusty.
Connect the DC outputs to each battery with fuses near the batteries, sized for the charger’s current.
On the Skylla-i, fit the supplied temperature sensor on the main battery and connect voltage sense wires if the cables are long.
Connect the AC input through a breaker.
Select the charge algorithm, or connect to a GX device over VE.Can for monitoring and settings.
For lithium, wire the BMS’s charge enable to the charger’s on/off input, or use CAN-bus control.

Paralleling for More Current

Single-output Skylla-i chargers with VE.Can can be synchronized in parallel, so two 24/100 units deliver up to 200A as one charger. The two- and three-output versions can’t be paralleled with each other, as noted above.

Using It as a Power Supply

In power supply mode, the Skylla holds a set DC voltage without a battery charge profile. That’s handy for running 24V equipment on a workbench or in a vehicle during maintenance when the batteries are disconnected.

FAQ

Can the Victron Skylla-i charge lithium batteries?

Yes. Victron describes it as Li-ion ready, with BMS on/off control or CAN-bus control.

Does the Skylla-IP65 work on 120V?

Yes. It accepts 90–265V AC.

Can the Skylla-IP65 be mounted outdoors?

Its IP65 rating protects against dust and water jets, so it suits wet lockers and exposed bays. Keep it out of direct immersion.

Does the Skylla show up on VRM?

Yes, through a GX device connected over VE.Can.

Is the Skylla-i available for 120V?

No. The Skylla-i runs on 230V AC (or DC input). For 120V, the Skylla-IP65 accepts 90–265V.

Sources: Victron Skylla-i 24V datasheet; Skylla-IP65 datasheet; product pages, victronenergy.com, accessed Oct 2026.