Charging 51.2v LiFeP04 Batteries with a 60v 5 amp power supply
- Thread starter threepets
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timselectric
If I can do it, you can do it.
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Only if it's adjustable to a lower voltage.
If it is.
Positive to Positive and negative to negative.
If it is.
Positive to Positive and negative to negative.
pollenface
Solar Addict
I don't see why not. I have two of those power supplies, they are great for charging with a timer switch (ie. 2hrs @ 56.8v)
Don't have experience with those batteries, but usually you would connect positive of the first battery and negative of the last battery.
Don't have experience with those batteries, but usually you would connect positive of the first battery and negative of the last battery.
42OhmsPA
What's in a title?
What Tim said. Battery 1 gets the positive, battery 4 gets the negative.
Do not adjust the voltage while connected to the batteries.
Do not adjust the voltage while connected to the batteries.
Cronix
New Member
Wouldn't that take about 35 hours to charge 400ah of batteries @10a from 20% SOC assuming no load while charging?
timselectric
If I can do it, you can do it.
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Or longer
jimdandy
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well since you have two chargers i'd just click negative on the negative bus at the bottom and positive at the positive bus on the bottom and do the same at the top with the other charger.. and then set it to about 57.5 or so and wait a few days... as was mentioned. set the voltage BEFORE HOOKING to the bus. They will run at max amps for a few days.. then they will back off as the voltage approaches the 57.5 area.. of course 3.65X16 cells would be 58.4 but I don't like to pump them up that tight. I wish you success.
I am using solar and the batteries and now the grid to run my household. We have had one day of some Sun in three weeks. Where I live the Electric Co. has offered a Ultra Low Overnight 2.8c/Kwh electricity rate .The 4 batteries are between 71% and 78% State of charge . I want to top them up at the cheaper rate. I have charged all the batteries individually before to 56v and they Individually settled to 54v. I only have 8 hours every night to charge. So I need to charge all batteries at the same time. How can I connect the 2 power supply's to the 4 batteries
Thank you very much. Can I run the chargers while the system is under load.
Cronix
New Member
Yes, it will just take longer. You probably wouldn't want your banks SOC to go below 20% while charging AND under load.
jimdandy
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you can but if you are drawing more than 10 amps you will not be gaining at all. you could run some led lights or a computer maybe or charge some cell phone but any more than 10 amps and you will be using it as fast as you are charging it. You had just as well power the load from the same grid you are running the two chargers from. You lose some in heat when you stick 500 watts in the battery from the chargers and then again as it is ran through the inverter to the load. Just as well get it from the grid and let the batteries charge for when you need them.
Yes. This would be common and ordinary.
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