48V 200aH 16 AGM batteries

[Eugene099]

I have a 48V system and resently bought 16 200aH AGM batteries, can I install it in series to give 800Ah and then in parrallel to give 3200aH. I have 8 300W solar panels and a 60A controller.
What is the best way to wire the system?

[Eugene099]

The above batteries is 12V, the solar panel is 24V 8 Amps.

[Wy_White_Wolf]

Wiring batteries in series does not raise the AH rating of the bank. It raises the voltage. So 4 batteries in series would be 200AH @ 48 volts. Adding 3 more strings would increase the AH rating without affecting voltage. So that would be 800AH at 48V.

No that is not the best way build or design the system. It the ignorant way that happens when people buy before learning what they need or what works best. The best way would have been to buy batteries big enough to have only 1 string of batteries.

WWW

[Eugene099]

Can I wire 4 batteries in parrallel to have a sting of 800Ah and 12V, the put 4 more stings like that to increase to 3200AH, 48V?

[Wy_White_Wolf]

No, you are right in the 4 batteries in parallel will give you 800AH @12v but when you put 4 of them in series it would only give you 800Ah @ 48V.

WWW

[Sunking]

You have 16 units of 12 volt 200 AH batteries. Simple Math. 16 x 12 volts x 200 AH = 38,400 watt hours period. You can arrange them as:

12 Volts: putting all 16 batteries in parallel strings which gives you 12 volts @ 3200 AH or 12 volts x 3200 AH = 38.400 Watt Hours

24 Volts: 2 in series and 8 parallel Strings which gives you 24 volts @ 1600 AH or 24 volts x 1600 AH = 38,400 Watt Hours

48 Volts: 4 in series and 4 parallel strings which gives you 48 volts @ 800 AH or 48 volts x 800 AH = 38,400 Watt Hours

96 Volts: 8 in series and 2 parallel strings which gives you 96 volts @ 400 AH or 96 Volts x 400 AH = 38,400 Watt Hours

192 Volts: All 16 in series which gives you 192 volts @ 200 AH or 196 volts x 200 AH = 38.400 Watt Hours.

See anything in common?

Series Voltage Adds
Parallel Current Adds
Power always adds. Every battery is 12 volts x 200 AH = 2400 watt hours. You have 16 of them or 16 x 2400 watt hours = 38,400 watt hours

Here is the bad news. The only good configuration is 196 volts. You really screwed up using parallel batteries. In about a year or less you will learn this lesson the good ole fashion way loosing lots of money when you have to replace the batteries. Don't make that mistake twice.

[Eugene099]

Thank you for the assistance.