When the mains cuts out, the 12 volt battery kicks in. When the mains goes back on, it charges up your 12 volt battery. Constant power!There is a solar option, which uses a specially designed 20 watt solar panel that fits directly into the energiser to charge your 12 volt battery. No more lugging your battery inside!Get the Energiser CP1900 from Fenceman.High power / low power: Use the high power to establish the fence with new livestock - once they stop testing the fence switch to low power to conserve battery life. For longer fences it will be necessary to keep the unit on high powerDay mode: Full power during the day had half power at nightNight mode: Full power during the night and half power during the dayPulse rate: This alters the time between pulses from 1.5 seconds to 2.5 seconds, which is useful to increase battery lifeThree stage battery warning light: This gives a good indication of the state of charge of the main 12v battery and when this is disconnected the back up batteries are monitored.Pulse light: This indicates the unit is functioning additionally this will double flash to indicate low fence voltage and therefore a possible fault on the fence.On/Off Switch: Easily turn your energiser on and off with no need to fiddle about with wiresWill power up to: 14 KM standard horse fence / 3 x 50m poultry netThe CP1900 will power up to 14km of fencing at a fence voltage of around 4,200v under normal load and has two power output settings. as well as 2 pulse rates. On the low power setting, it has 0.85 output joules and on the high power setting it has 1.36 output joules. This allows you to run it on high power for longer fences or until your animals have learned to respect the fence and then you can turn it down to low power to conserve battery life. The pulse rate is adjustable from 1.5 seconds to 2.5 seconds, allowing you to conserve battery power even further.High PowerStored energy - 1.86 JoulesOutput energy - 1.36 JoulesFence voltage max - 8,500vFence voltage at 500ohms - 4,200vCurrent consumption - 114mA (12v)Suitable for up to 4 electric netsLow PowerStored energy - 1.4 JoulesOutput energy - 0.85 JoulesCurrent consumption - 63mA (12v)Suitable for 1-2 electric netsComes with:EnergiserEarth stake and handleearth wire and live fence wire4 x D cellsInstructionsOptional: Mains AdaptorOptional: Solar Panel3 year warranty