#Battery status in parallel connection series#
It is faster to charge your battery in series if you have a 12/24 selectable power supply. This results in the first battery having to perform more work, thus reducing the lifespan of the first battery.įor more information about wiring batteries in series or parallel, read my article here. That means the load will get pulled from the first battery. If you do not wire the batteries like this, the battery that is furthest away will not be cycled. The correct way to wire parallel batteries You should wire in a way that the first battery has the positive or negative and the last battery has positive or negative lead. When you wire your batteries in parallel, you should not use one battery as the main battery. Charging the battery with the same 40Amps charger will damage the battery because the battery is rated at only 20 Amps charge and discharge current. If you connect the same batteries in series, then you will have a 24V 100Ah battery. Charging the battery with 40Amps is going to be better to keep the battery healthy over many years. If the C-rate of that battery is 0.2, then you can charge and discharge that battery efficiently at 40Amps. Let me explain: connecting two batteries in parallel will increase the Ah (capacity) of the battery, while the voltage stays the same. Let’s say you have the same 12V 100Ah batteries and a 40A charger, then you should wire your batteries in parallel. If you charge at a higher current, then the lifespan will decrease and you can store less energy in it because of heat generation. If you have a 100ah lead-acid battery with a C-rate of 0.2, then it’s best for the battery to charge at 20amps max. However, when we look at the C-rate of the battery we can optimize for the current draw. Wiring a battery in series or parallel doesn’t give you more power. If you have two batteries and you can make a 24V configuration, you should charge your batteries in series. Since battery chargers are limited by current, we can see that the 12V parallel connection needs double the time to charge than the series connection. Series connection: P=24V x 10A = 240Watts You need to have your charger set at 24V. If you connect your batteries in series, you will have a 24V 100Ah battery. Parallel connection: P=12V x 10A = 120Watts You need to have your charger set at 12V. If you parallel connect, then you have a 12 volt 200Ah battery. You have two batteries, each 12Volts 100Ah and you have a charger that is able to charge at 12V or 24V and is rated for 10Amps. If your charger has a variable voltage, 12 or 24Volts, then it’s better to charge them in series. If your battery charger is limited to 12Volts, then you should wire your batteries in parallel (if you have two 12V batteries). That’s if your charger is limited to a certain voltage.
#Battery status in parallel connection full#
They still have to absorb the full energy capacity (watt-hours).
Batteries don’t charge faster when you put them in series or parallel. Now when you want to charge your batteries, you might think that you can charge it faster if you put it in a series or parallel configuration. We can wire our batteries in series or parallel as I have written about in my previous article.