Information Solar Charge Controllers

Info on Solar Charge Controllers


Solar Charge Controllers

Solar Charge Controllers.
To charge a solar battery the right way with solar energy you need a charge controller. It stops recharging when the battery is full. And stops charging attached devices when the battery voltage gets too low. That way it prevents the battery from deep discharge.
The solar charge controller should be installed between the solar panels and the battery.

Solar charge controller PWM (Pulse With Modulation).
A PWM charge controller is a good choice for small solar systems, say up to about 200 watts (12V)
The charge controller regulates the solar panel voltage into a suitable voltage for charging the battery.   Further below, you will find more on PWM and MPPT.


Next is information on some of the best PWM solar charge controllers with negative grounding.


Renogy Adventurer 30A PWM Solar Charge Controller

Renogy Adventurer 30A PWM Solar Charge Controller

This solar charge controller features:
- Grounding type: Negative,
- For 12V and 24V Lead-acid and Lithium batteries: Sealed, Flooded, AGM, GEL,
- LCD display,
- Charge current: 30A,
- USB port 5V / 2.4A max, to charge phones, tablets, cameras and more,
- 4-stage PWM charging: bulk, boost, float, and equalization,
- Protects against over-charging, over-discharging, short-circuit, reverse polarity, reverse current,
- RS232 communication port for Bluetooth, and app usage,
- Charge controller size: 6.56" x 4.5" (166 mm x 114 mm),

It comes with mount attachment and stainless steel screws.

For the Renogy Adventurer 30A Solar Charge Controller, see Amazon ad link here for more information, reviews, and best pricing.


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WERCHTAY 30A PWM Solar Charge Controller

WERCHTAY 30A PWM Solar Charge Controller

This solar charge controller features:
- Grounding type: Negative,
- For 12V and 24V Lead-acid batteries: Flooded, AGM(deep cycle sealed), GEL,
- LCD display,
- Memory data storage,
- Charge current: 30A,
- Two USB ports 5V / 2.5A, to charge phones, tablets, cameras and more,
- 3-stage PWM charging: direct, lifting, floating,
- Protects against over-charging, over-discharging, short-current, reverse polarity, open circuit,
- Supports up to 400-watt solar panels,
- Charge controller size: 5.25" x 2.75" (134 mm x 70 mm),

For the WERCHTAY 30A Solar Charge Controller, see Amazon ad link here for more information, reviews, and best pricing. There's also a 30A MPPT solar charge controller available.


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A popular solar charge controller is the

ALLPOWERS 20A PWM Charge Controller

ALLPOWERS 20A PWM Charge Controller

This ALLPOWERS solar charge controller model FBA_AP-OT-002-BBLU features:
- For 12V and 24V Lead-acid batteries: Flooded, AGM(deep cycle sealed), GEL,
- LCD display,
- Charge current: 30A,
- Supports up to 430-watt solar panels (24V batteries),
- 4-stage PWM charging: bulk, boast, floating, equalization,
- Protects against over-charging, over-discharging, short-current, reverse polarity, reverse current,
- 2 USB ports 5V / 3A max, to charge phones, tablets, cameras, and more,
- Charge controller size: 5.79" x 3.15" (147 mm x 80 mm),

This charge controller should be installed in a cool and well-ventilated space, and is not suitable for other batteries than lead-acid.

For the ALLPOWERS 20A Solar Charge Controller, see Amazon ad link here for more information, reviews, and best pricing. There's also an ALLPOWERS 30A PWM solar charge controller available.




A very popular solar charge controller is the

Renogy 10A PWM Charge Controller

Renogy 10A Charge Controller

This Renogy solar charge controller model Wanderer features:
- Grounding type: Negative,
- For 12V and 24V Lead-acid and Lithium batteries: Flooded, AGM(deep cycle sealed), GEL,
- LCD display,
- Charge current: 30A,
- 4-stage PWM charging: bulk, boast, floating, equalization,
- Protects against over-charging, over-discharging, short-current, reverse polarity, reverse current,
- Two USB ports 5V / 2A, to charge phones, tablets, cameras, and more,
- RS232 communication port for Bluetooth, and app usage,
- Charge controller size: 4.69" x 2.96" (119 mm x 75 mm),

For the Renogy 10A Solar Charge Controller, see Amazon ad link here for more information, reviews, and best pricing. There are also 10A Positive Ground, and 30A Li compatible charge controllers available.


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Negative and positive grounding.
A negative grounding solar charge controller is compatible with any negative grounding system, so when there's something such as a short-circuit happening, the solar panel and battery are safely grounded.
With positive grounding, all positives are wired together.
Make sure your solar panel's positive and negative terminals are connected to the same terminals on the charge controller, without grounding somewhere.


Questions you might have.

Should I follow a particular order when installing a solar power controller?
Yes, start with connecting the battery to the charge controller.

Can I mount the solar charger controller on a solar panel?
It is recommended to leave some space between a solar panel and the charge controller.

Can a charge controller charge and control more than one battery?
Yes, it can if the batteries are connected by the same wire.

How many batteries can be charged and controlled by one charge controller?
If, for example, the charge controller has a 20A capacity and a battery takes 10A to charge, you could connect two batteries.


Should I get a PWM or an MPPT solar charge controller?
If you have a small solar system, for example up to about 200 watts (12V) solar panel(s), a PWM charge controller is a good option.
For a larger system, and when solar cells will have frequently low or very high temperatures, then an MPPT charge controller is the best choice.

Other advantages of an MPPT charge controller:
- You can have solar panels connected in series = higher voltage,
- Thinner wiring needed = lower costs,
- And MPPT is more suitable in case of partial shading.


Disadvantages of a PWM solar charge controller.
When the solar panel(s) reach high and low temperatures, the solar panel voltage will be lowered to the voltage of the battery. Therefore the solar panel output wattage decreases.
Also, when it gets very cloudy or rainy, the solar panel output wattage lessens.
And you might need thicker wiring when there are more solar panels to connect.

Advantages of a PWM solar charge controller.
A PWM charge controller is usually smaller than a PMMT charge controller.
You might benefit from a PWM controller for a longer time than a PMMT controller as the PWM controller is a simpler device with less components that can get broke.
And the price is a lot lower.


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