All Questions
Tagged with 12v battery-charging
29
questions
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answers
29
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How can I improve this smart 12v battery charger circuit? [closed]
I am a beginner so I need help on figuring this out I got it in this condition but I think by fixing it will help me learn a lot I've built a few things with success and I've worked on many electrical ...
- 11
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208
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Should the DC-DC and solar charging go through the main fuse or dedicated fuse?
I am planning a 12V dual battery setup to be used in a car. The aux battery is a LiFePo4 battery and it will be charged via a combined DC-DC and solar charger (50A, fuse 65A).
I want to add a fuse and ...
- 1
1
vote
2
answers
80
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Can I charge my two large 12 V bus batteries that add up to 24 V together with a a 12 V solar panel?
Just wanting some way to charge my bus batteries while parked for a long amount of time besides a battery charger. But am having trouble figuring out what kind of solar panel to get.
My bus batteries ...
- 11
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12V boat lead acid battery suddenly failed
Battery on boat and powered by solar panels started acting really weird suddenly exactly a week ago. App shows voltage went from minimum 12.3V to min 6V in a day. On board voltmeter showing 11.9-12.2 ...
0
votes
4
answers
8k
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Is it acceptable to connect a car battery and an AGM battery in parallel?
I power a 12V fridge in my car either via the car battery (when the vehicle is running) or via an AGM battery. There is an Anderson outlet in the car connected to the car battery to which I attach a 3 ...
- 185
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2
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2k
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Overcharge a sealed 12V lead-silver-calcium battery with a power supply to prevent sulphatation
I read that lead silver calcium battery need 14.8 V to fully charge. The max with my charger (ctek) is AGM setting which is 14.7 Volt. I fear this lower voltage this will lead to sulphatation of the ...
- 1
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votes
1
answer
592
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Can I run 12V camper van fridge whilst 'trickle charging' the battery in van?
I am running the following setup in my camper van and would like to know if there is a simple solution or device that would be effective in allowing me to run my 12V fridge whilst the leisure battery ...
1
vote
1
answer
264
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Help me understand my campervan split charge relay
I am new to the world of electronics, but keen to learn. The below all relates to the 12 V circuit of my van.
I have picked up a campervan which has a second "leisure" battery which powers items in ...
- 13
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votes
1
answer
86
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12V - How to activate an electric item if battery is full
I have a solar system 12V connected to a PWM controller 20A and a lead-acid battery 80Ah deep cycle.
What kind of setup should I make to activate a pump (12V) if the battery is full ( >13.8V ) ?
- 255
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votes
1
answer
228
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BMS for 2S Lipos
I have 2 lipo batteries in series, each has a built in protection circuit and these specifications:
Voltage: 3.7 Vcc
Capacity: 1000 mAh
Maximum discharge rate: 2100 mA
I need to charge them, but I ...
- 101
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votes
1
answer
647
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Solar charge set up damaging battery?
I've installed a 12V 80W solar panel plus controller and attached it to a 12V 105Ah leisure battery. At first it (appeared to?) work. The charge status on the solar charge controller was at max and it ...
- 13
0
votes
2
answers
181
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Van with Solar power but no auxillary battery and only on sunny days. Do I need switches and isolators?
I have a 2018 Ram Promaster city cargo van with OEM 12v 70AH 120RC Sealed Led acid battery and a 160a alternator.
Sitting on top of the battery I have a 1200 Watt pure sine 110v inverter connected ...
- 141
0
votes
2
answers
457
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Is my 12v lead acid battery 100% dead?
so I got a ups with a 12v lead acid battery that was constantly on so the water inside the cells has disappeared, initially the reading voltage was 0.3v, and when I added distilled water it generally ...
- 111
2
votes
2
answers
16k
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Charging rate for deep cycle 12v battery
I have a 75 AH deep cycle battery(AGM) and I have a battery charger with 2 modes, 5.5A for car, 2A for motorcycle, as far as I remember, lower charging rate is usually better for longer battery life ...
- 41
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votes
1
answer
990
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Can I use a car battery as input for a solar charging controller? [closed]
I have the following setup
30W 12V solar panel
connected to
260W solar charging controller
connected to
12V 7Ah AGM battery
I would now like to use my 60Ah car battery to charge the 7Ah AGM battery....
- 119