Beschrijving
ARCO Zeus A4000 24V LTO High Output Dynamo
The ARCO Zeus A4000 24V LTO is a powerful 24V high-output alternator, specially developed for on-board systems where a high charging output at low engine speeds is important. Thanks to the Low Turn-On design does the alternator start delivering power even at low revs and are large lithium and lead-acid battery banks charged efficiently even while idling and cruising quietly.
The A4000 uses a genuine 24V rotor and field control. As a result, the alternator operates more efficiently and stays cooler than many 24V alternators that internally use a 12V rotor design.
With a maximum output of 144A at 27.5V, good for nearly 4,000 watts, the A4000 delivers a very high charging capacity. More importantly is the output at low revs. At 3,000 alternator rpm, the A4000 still delivers under warm conditions 108A at 27.5V, or rather almost 3,000 watt continuous.
With a usual pulley ratio of approximately 1:2, 3,000 alternator rpm corresponds to approximately 1,500 motor rpm. Even around idling speed, the A4000 can therefore generate a very substantial amount of energy. The exact yield depends on the pulley ratio and the engine speed.
The A4000 is designed for long-term heavy workloads. The combination of dual internal fans, an externally mounted rectifier and a heat-dissipating coating ensures optimal cooling and high continuous performance.
For safely and correctly regulating the charging current, a external dynamo controller necessary, such as the ARCO Zeus or Zeus Omega Controller. This allows the charging process to be precisely tailored to lithium and other battery types, and enables monitoring of voltage, charging current and temperature, among other things.
Key benefits
- Very high charging output at low revs
- Low turn-on design for early alternator activation
- Up to 144A maximum output at 27.5V
- With a 1:2 pulley ratio, almost 3 kW charging capacity around 1,500 motor rpm
- Genuine 24V rotor and field control for higher efficiency and lower temperatures
- Ideal for large 24V lithium battery banks
- Advanced cooling for prolonged high loads
- Can significantly reduce or prevent the use of a separate generator
- SAE J1171 certified for marine use
- Developed and manufactured in the USA
The A4000 is available with various mounts for, among other things, Yanmar, Volvo Penta, MerCruiser, Mercedes Sprinter and various other engines.
Through our decision support tool you can easily determine which version fits your motorcycle. If you cannot figure it out or are unsure about the correct mount, please feel free to contact us.









