Well, we should mainly use solar to charge our batteries, right? Sometimes we just need this little bit of extra help to charge our cells from the grid. Some of these chargers below can actually hook up to a DC source and charge form another battery for example.
Liitokala Lii-500 NiCd/NiMH/Li-ion charger
I’m using this charger for over a year now and am pretty happy with it. I handles all kind of cells and measures capacity and also internal resistance. It can be powered from any 12V DC source (but a power supply is also included)
Amazon product link
54.6V 5A Smart Lithium Battery Charger For 48V Battery Systems.
The charger does not seem to deliver 5A but even with the 3.7A I measured, it’s a great little emergency charger for your 48V battery pack. I used it twice now and it works with no problem.
Also, it delivers 54.6V constant voltage so you cannot overcharge your battery at all!
Amazon product link (4A version)
AliExpress product link
Victron Energy Orion-Tr DC-DC Converter, Isolated
12-48V input voltage
12/24V Output voltage (adjustable)
max 30A output current
several converters can be paralleled
select the right voltage when charging batteries with this power supply
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the Off-Grid-Garage 