Pulse Width Modulation Regulators - Four Stage ChargingSimple PWM Budget PWM Premium MPPT
Premium pulse width modulation (PWM) regulators incorporate the features of the budget PWM regulators with the addition of a LCD display and data logging. More importantly, these solar controllers use a 4 stage charging cycle:
- Boost - This function lets the full charge of the solar array through to the batteries, allowing the batteries to be charged as quickly as possible.
- Absorption - Absorption slows the charging process down. As the batteries reach full charge, the regulator enables this function to prevent overcharging.
- Float - When the regulator is in float mode, the batteries are considered full. The voltage is 'held' at a safe point and no extra charge is let through (unless needed).
- Equalisation - Approximately once a month, the regulator slightly overcharges the batteries. This equalising charge allows tiny champagne size bubbles of gas to physically mix up the electrolyte and forces the individual cells of the battery bank to reach an equal level of charge. Equalisation helps prolong battery life.