Panel directly to battery vs pwm

[GeorgeF]

For a small cyclic application I am wondering what's more efficient using a 12v solar panel (vmp 19v) :

* directly connected (with diode) to a 12v lead acid battery and cut-off automatically @ for example 14.7v

or

A cheap pwm charge controller which automatically change to float mode, standard @ 14.4v charge and 13.2v float.

It is for sure that the battery will be discharged every evening.

[SunEagle]

For a small cyclic application I am wondering what's more efficient using a 12v solar panel (vmp 19v) :

* directly connected (with diode) to a 12v lead acid battery and cut-off automatically @ for example 14.7v

or

A cheap pwm charge controller which automatically change to float mode, standard @ 14.4v charge and 13.2v float.

It is for sure that the battery will be discharged every evening.

Unless the panel wattage and charging amps is small, hooking it up directly to a battery can eventually cook the battery. While a PWM CC may be an added expense, it should "control" the charging amps and voltage going to the battery once it is charged.

If there isn't anything to stop the charging or lower the voltage and amps a battery can be cooked.

[GeorgeF]

The charging will automaticly cut-off using this module , no stpdown.

[GeorgeF]

https://www.amazon.com/Battery-disch.../dp/B07VT18D41 i can buy this for 6usd @ a local online shop

[Bala]

For off grid solar you want your battery to be able to take charge from the solar panel when ever there is sun available.

IMHO Using a device that cuts charge totally is a poor option compared to an actual solar charge controller.

[Mike90250]

The the difference on cost between the module, and a passable PWM Charge Controller, would be maybe $30 ? A $40 PWM controller that manages Absorb & Float charging is vastly superior to a simple on-off charger with only one charging mode, which will harm the batteries. You can't use a float charge for a cyclic battery

[GeorgeF]

To be simple:

Mppt = power ini -> power out

Pwm = amp in -> amp out

How about panel directly connected to the battery?

Its not about costs. Just curieus whether direct pv charging, no stepdown, is more efficient than pwm.

[Mike90250]

To be simple:

Mppt = power ini -> power out

Pwm = amp in -> amp out

How about panel directly connected to the battery? ...
...

Same as PWM. PWM is just a on off FET switch, no magic