Olli 122B is the most versatile battery energiser in the Olli family

Olli 122B is a conveniently movable 12V/230V energiser for medium length fences. It can also be connected to mains power with the adapter included. If necessary, the backup batteries (4×1.5V) maintain energiser functionality while the battery is being charged. A solar panel is available as an accessory (Olli 20 W solar panel package).

The smart energiser automatically chooses the best available energy source. All three power supplies (mains adapter, 12V rechargeable battery, 4 pcs. 1.5V D/LR20 alkaline batteries) can be connected at the same time. The unit primarily operates on 12V battery power, and when the mains adapter (or optional solar panel) is connected, the battery is charged. When the rechargeable battery runs out, the unit switches to the batteries. When the batteries run out, the operation is continued using the 12V battery at low power and slowed pulse frequency.

1.21J output energy. 2 power levels + 2 pulse speeds, the power can also be set to adjust for the light level. Comprehensive LED display. The low voltage warning light indicates the need to charge the battery and low fence voltage warning reveals problems with fence condition. Deep battery discharge protection.

Tip! We recommend using leisure batteries as the energiser’s power source instead of vehicle starter batteries. Read more about using different types of batteries with energisers >

Tip! Inadequate earthing is the most common cause of poor fence efficiency. By correct and adequate installation of earthing from the very beginning, you can avoid a lot of problems related to poor fence efficiency. Read more about functional implementation of earthing >

Peace of mind for years – Olli energiser service

All Olli energisers come with a 3-year warranty that also covers damages caused by lightning. Olli energisers made in Finland are serviced by the service outlet of our plant and by authorised Olli Service Partners throughout Finland. We guarantee availability of spare parts for many years to come, for discontinued models as well.

Mains energisers | Battery energisers | Solar panel energisers

Product information

Maximum voltage Indicates the peak impulse voltage in case of a short, leak-free fence (low load) or without a fence. Because energiser voltages are quite high, the values are often expressed in kilovolts (kV), i.e., in thousands of volts.
Voltage at 500 Ohm load Indicates the peak impulse voltage if the fence is heavily loaded.
Stored energy The maximum energy that the energiser can build up for a shock.
Maximum output energy Indicates the shock intensity, in other words, the maximum energy the fence energiser is capable of supplying to the fence in a single impulse. The higher the energy, the longer the fence serviceable by the energiser. A high-energy shock is also more perceptible, since it lasts longer. When comparing energisers, this is a value worth paying attention to.
Power consumption Indicates the maximum actual electricity consumption. In case of a mains energiser, 10W power in round-the-clock use means an annual consumption of 87.6kWh. At a price of €0.15/kWh, using the energiser would cost about €13 a year. A battery energiser is powered from a battery. In many models, power consumption varies depending on the energiser’s power setting and/or fence load. The maximum battery life (in hours, h) can be estimated by dividing the declared capacity of the battery (e.g., 60Ah = 60,000mAh) by the energiser’s declared power consumption: 60,000mAh/100mA = 600h = 25 days.
Recommended number of earthing rods
1-2 pcs.
Maximum theoretical fence length The longest theoretical single-wire fence built of thick metal wire in which the fence voltage can still be sufficient for fence functionality. Indicated in kilometres. In practice, such a situation is truly rare, almost impossible. Nevertheless, alike maximum output energy, the value is useful, for example, when comparing energiser models from different manufacturers.
Maximum theoretical fence length (light vegetation) A value more suitable for comparison when assessing the suitability of an energiser for your fence. Refers to a situation where the fence consists of conductors that conduct electricity well and there is little vegetation in contact with the fence. Note that this value indicates the total length of the fence, i.e., with all of the fence conductor strands combined.
Maximum theoretical fence length (moderate vegetation) Refers to a situation where there is more vegetation in contact with the fence. Note that this value indicates the total length of the fence, i.e., with all of the fence conductor strands combined.
Built-in lightning protection
Warranty, incl. lightning damage
3 years
Olli product code
EAN code
Solar panel available as an accessory