Are You do research and wanted to go with a 24v solar pv setup on the roof (520 watts total), but still have a 12v battery bank?. So You'll need an MPPT controller for this, and the Tracer by SainSonic 30amp controller works great. MPPT circuit solar controllers are considerably more elaborate than PWM. The voltage of the solar panel changes with time of day and temperature. The optimum voltage for battery charging changes as the state of charge of the battery. The MPPT charge controller matches these voltages and can result in 30% more efficient transfer of power. This means good MPPT solar charge controllers can reduce the number of solar panels needed by up to 30%- a tremendous benefit. Even if the excess panels are purchased, benefits are realized in a Grid Tie system because more electricity can be sold back to the grid. While only a small part of system price, a MPPT solar panel charge controller can leverage the rest of the system to better performance. this product hooked up to 2x175ah AGM batteries, and it keeps them charged and ready. It's interesting too how it takes a 24 volt input from the solar panels (actually closer to 34 volts in the direct sun), and down converts to a 14.5 volt charge and increases the amperage from about 10 amps from the panels to over 20 amps feeding the batteries. Makes for a quick recharge for your battery bank. this is recomended for getting the plug-in digital meter so you'll have some idea what's going on with your system. These product are avalaible on Amazon through this link.
What Are Product Feature :
- MPPT technology; Excellent thermal design and nature air cooling; CE certificate;
- Peak conversion efficiency of 97 %; High Tracking efficiency of 99%; Several seconds tracking speed;
- Very fast Sweeping of the entire I-V curve; 4- Stage charge with PWM output; Temperature compensation function；
- Full power output in ambient temperatures up to 45 degree; Sealed, Gel, Flooded battery type optional; ON/OFF, Dusk to dawn, 1-15h timer；
- Diversified load control: Manual, Dusk to Dawn, Dual timer, TEST;
- Only 5 left in stock.
rSpecification:
* Model No: Tracer-3215RN
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* Nominal System Voltage: 12VDC | 24VDC Auto work
* Rated Battery Current: 30A
* Maximum Battery Voltage: 32V
* Max. Solar Input Voltage: 150VDC
* Max. PV input power: 12V/ 390W 24V /780W
* Self-consumption: <10mA(24V)
* Charge Circuit Voltage Drop: <=0.26V
* Discharge Circuit Voltage Drop: <=0.15V
* Communication: TTL232 / 8pin RJ45
Environmental Parameter:
* Working temperature: -35 to +55 C
* Storage temperature: -35 to +80 C
* Humidity: 10%-90% NC
* Enclosure: IP30
Mechanical Parameter:
* Dimension: 242 x 169 x 91 / mm
* Mounting holes: 180 x 160 / mm
* Mounting hole size: Φ5
* Terminal: 25mm²
* Weight: 2.05kg
As an considerations, we provide one of an excerpt from product users(Ron_B)
" This MPPT controller is awesome. I got 3 100 watt Renology matched panels (the best) and hooked them up in series to this controller. The batteries were getting charged way past sunset - actually until it got dark. The controller puts way more in the batteries then a PWM (almost 15 volts). I like the feature of extending battery life with its battery optimization. I noticed the batteries are getting fully charged with this controller. I have the prowatt SW2000 inverter so I can run the refrigerator or the air conditioner. The solar panels and the controller keep up with the small air conditioner on a sunny day. The only downside is that my wind charger sensed to much voltage and kicked on the brake. I moved the wind charger to another battery bank. You may not be able to share the battery bank with a wind charger. The manual is not that great - just adequate. It is easy to set up; connect the solar panels then connect the batteries and change battery type - done."
Read full review here. Or if you need information about best generators, you can find here Best generator
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