![]() disconnect the load earlier) until the harvested solar energy is sufficient to recharge the battery to nearly the full 100%. The Battery Life algorithm will monitor the state of charge of the battery and, if needed, day by day slightly increase the load disconnect level (i.e. ![]() This mode of operation (no regular full recharge) will destroy a lead-acid battery within weeks or months. A special interface cable may be needed, please see the manual.īattery Life: intelligent battery management- When a solar charge controller is not able to recharge the battery to its full capacity within one day, the result is often that the battery will continually be cycled between a ‘partially charged’ state and the ‘end of discharge’ state. Some loads (especially inverters) can best be connected directly to the battery, and the inverter remote control connected to the load output. ![]() Alternatively, an intelligent battery management algorithm can be chosen: see Battery Life. The load output will disconnect the load when the battery has been discharged to a pre-set voltage. Load output- Over-discharge of the battery can be prevented by connecting all loads to the load output. Ultra-fast Maximum Power Point Tracking (MPPT)- Especially in case of a clouded sky, when light intensity is changing continuously, an ultra-fast MPPT controller will improve energy harvest by up to 30% compared to PWM charge controllers and by up to 10% compared to slower MPPT controllers. ![]() The option to wire more panels in series and thereby decrease current, is a compelling reason to install an MPPT controller as soon as the array power exceeds a few hundred Watts (12 V battery), or several 100 Watts (24 V or 48 V battery) If connected to a PV array with a substantially higher nominal voltage than the battery voltage, an MPPT controller will therefore provide charge current even at very high cell temperatures or in low irradiance conditions when a PWM controller would not help much.Īs array size increases, both cabling cross sectional area and cable length will increase. Thus, it essentially decouples the array and battery voltages, so that there can be a 12 volt battery on one side of the MPPT charge controller and two 12 Vpanels wired in series to produce 36 volts on the other. Besides performing the function of a basic controller, an MPPT controller also includes a DC to DC voltage converter, converting the voltage of the array to that required by the batteries, with very little loss of power.Īn MPPT controller attempts to harvest power from the array near its Maximum Power Point, whilst supplying the varying voltage requirements of the battery plus load. It is generally accepted that MPPT will outperform PWM in a cold to temperate climate, while both controllers will show approximately the same performance in a subtropical to tropical climate. Thus, it essentially decouples the array and battery voltages so that there can be, for example, a 12 volt battery on one side of the MPPT charge controller and panels wired in series to produce 36 volts on the other. The MPPT controller is more sophisticated (and more expensive): it will adjust its input voltage to harvest the maximum power from the solar array and then transform this power to supply the varying voltage requirement of the battery plus load. The result is that the voltage of the array will be pulled down to near that of the battery. The PWM controller is in essence a switch that connects a solar array to the battery. PWM and MPPT charge controllers are both widely used to charge batteries with solar power. BlueSolar maintains battery health, extending its life. Using the latest, fastest technology, BlueSolar maximises this energy-harvest, driving it intelligently to achieve full charge in the shortest possible time. A solar charger gathers energy from your solar panels, and stores it in your batteries.
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