It doesn't limit the voltage. Whatever your charger puts out will be presented to the battery. Remember your discharged battery will have a high load which will draw max current from your charger, and then as the battery charges the current will be reduced and the voltage will rise. Once the battery is full, the relay opens and stops all charging.

Dazza Direct Yes it can be powered by anything that provides enough power to charge batteries. I am using a 650 MA 14.5 volt adapter that was used to charge an old battery belt. This way my bike battery will be on a trickle charger over the winter and the module will kick in when the battery gets to 11.5 and stop when it gets to 13.8. Works like a charm. As my bike has electronics (alarm system) that has a constant drain I figure it was kick in for a few minutes every few days over the winter to top up the battery and not risk over charging.

@12voltvids Thanks for quick reply, im trying to build an off grid setup to power a few led lights a couple of cameras and a 2k inverter(around 150AH draw). i have around 200AH @12v. The cameras and lights only use 30AH a day and the the inverter powers tools for a few minutes a few times per week. I'm currently using a mix of smart and dumb chargers between 1A and 8A when needed in no particular pattern or order. There is 240v supply and im trying to automate the process rather than the current manual process. Have you seen the XH-M602 www.icstation.com/m602-digital-control-charge-control-module-220v-protection-board-lithiumlead-acid-battery-p-11315.html i likes the look of it as its mains powered and some say its better as it can shut the charger off completely. There is very little on these modules which i think is a shame as they have so much potential Pb/Li-ion/LiPo/LiFePO 4 etc. What do you recon is the maximum current @12v you would feel comfortable pushing through your XH-M604 i know they say 10A on the relay but some say 3A some even only 1A. Some have talked about adding tin to the tracks to increase its current carrying capaibility. below i have linked on of the few reviews of the item that i thought actually adds to you already clear explanation, and a project charger he has built from scratch i aim to one day try something similar , its a 12v petrol(gas) alternator charger, thanks for you help , excellent clear videos and have a great day. His review kzfaq.info/get/bejne/e8WDhNhpzJq2dYk.html. His D.I.Y battery Charger kzfaq.info/get/bejne/r7VzoNh4yrDdeZc.html

If you run your battery down to 0v chances are it won't charge anyway. You shouldn't take it down below about 9 volts.

I would also like to know the answer to this ? My mobility scooter has 4-12V-22 Ah AGM battery's. The manufacturer tells me I shouldn't leave the charger on for long period of as I may overcharge the battery's. I'd like to leave it plugged in for much longer, maybe several months at a time.

This controller is more for lead acid type batteries for maintaining charge.

I think for lithium this would be great. If you have 3 lithium cells in series then you set the start charge voltage to 9v (3 volts each cell) and the stop voltage at 12 volts (4 volts each cell), I think it would work great. You would want a balance board though to ensure you are not over charging or discharing a single cell in the series, otherwise they will get out of balance over time and will just die due to being over or underchanrged too much.

No, that's too much for the battery. Loading it with such a high voltage will destroy it. You have to use a charger between 12V and 14V.

You're right! It is shown in the video. Every time the charger is cut of, the battery voltage drops to 12,6V, while the charger is set to 14.3V

I didn't design it, I am just showing what is available.

A transformer and bridge rectifier, or DC power supply.

15 will probably be ok, but the optimum charging voltage is 13.8 for a 12 volt battery, but 15 is most likely fine as the controller will stop charging once the voltage gets to the set point.

@@12voltvids thank you for your quick reply 👍🏽

I have a problem. Im also using a power supply from laptop and it just blinks on and off doesn't charge. Tried 5 different chargers and buck converter to try and charge 24v batteries and still can't get it to chearge as soon as the relay kicks on chargers start flickering.

You might have to connect a boost converter to step up the voltage.

Tried that doesn't work.

Sanketh Saha When it is on the charger is connected to the battery. When it is odd the relay if open and the battery is disconnected. The voltage monitor is on the battery side so as the voltage drops below low setting it turns relay on and charges again

no

What just because I have a Harley?

Just kidding, Boys with toys !

Well I do live in one of the most expensive places in north america. With the average lot prices well over a million these days anyone that owns property is technically a multi-millionaire.

It will work in that too.

Yes

In your case, a solar loading controller would make more sense. For this device, you should have a steady voltage, which isn't possible with a solar panel (depends on the sunlight).

I have connected it to 12v batteries that were down at 4 volts and it turned on just fine and brought the battery up. It is a charge maintainer to prevent overcharging.

@@12voltvids : I had batteries below that, I had to charge them up get it to turn on. Why I call it a bad design is it won't produce power unless it sees enough power at the battery. Aka, best suited for a battery tender. Among those "603", "604" etc boards any recommendations for one like this, yet will put out/produce/output 12.5v's like a power supply...yet has a ~cutoff just like this one to tell it to trip off if it sees a battery go over a certain voltage (13volts)? I'm looking basically for one as a power supply regulater to produce a consent 12.5volts yet to stop at say 13. I'm using one of those 110v to 12v ~80watt inverters that's popular with led strips users to power these.