series stringing and batteries total capacity

[TommyDre]

If I buy one of those Collins Class submarine batteries, do you think I will need to recharge it if I only run my LED reading light?

[Sunking]

Ok I have 6 trojan T105 batteries. How can I string them to suit the inverter 24v?

Already answered this. Loose two batteries or gain two batteries. Take your pick.

If you use 6 volt batteries, it takes 4 in series to make 24 volts. So loose 2 batteries or gain 2 batteries. FOUR, EIGHT, TWELVE, SIXTEEN...

[SunEagle]

Your right. We can not string 12v with 24v.

Ok I have 6 trojan T105 batteries. How can I string them to suit the inverter 24v?

Here is what I have in mind string 2 sets of 2 batteries in parallel. And string them in series with the remaining 2 batteries.

How does that sound.

That still won't work.

All "strings" or "series wired batteries" need to be equal in every way not just in voltage rating.

IMO you have two extra 6volt batteries that should be used in a different system at 12volt then trying to use them in a 24v system.

[maxtshirt]

Not going to work. Draw it out on a sheet of paper, +6v-|+6v-|+6v-|+6v- 4 batteries gives you 24V @ah
+6v-|+6v- 2 batteries gives you just 12V @225ah
But there is no way to combine the 12V string with the 24V string

Your right. We can not string 12v with 24v.

Ok I have 6 trojan T105 batteries. How can I string them to suit the inverter 24v?

Here is what I have in mind string 2 sets of 2 batteries in parallel. And string them in series with the remaining 2 batteries.

How does that sound.

[Mike90250]

Tell me what you think....I will make 6x 6v Trojan batteries as my power bank. Thus I will series string 4 batteries and thats to achieve v24 @225Ah. Now I will parallel string the other 2 so that I get 450 Ah. Over all I wil have 675Ah In total. How does that sound to u

Not going to work. Draw it out on a sheet of paper, +6v-|+6v-|+6v-|+6v- 4 batteries gives you 24V @225ah
+6v-|+6v- 2 batteries gives you just 12V @225ah
But there is no way to combine the 12V string with the 24V string

[maxtshirt]

Lesson 1. DO NOT MIX BATTERIES of different manufactures, makes, models, voltage, capacity, size, age, ect....

If you have Trojan T-105, then every battery SHALL BE a Trojan T-105 with identical DATE CODES.

Lesson 2. Never Parallel Batteries unless necessary. If it is necessary for redundancy purposes in a mission Critical System. limit it to 2 parallel strings. Solar is not Mission Critical. If you need 500 AH battery, buy 500 AH cells. Lead acid batteries can be bought anywhere from 5 AH to 10,000 AH. Now here is a battery. A Collins Class sub:

[ATTACH=CONFIG]8094[/ATTACH]

Tell me what you think....I will make 6x 6v Trojan batteries as my power bank. Thus I will series string 4 batteries and thats to achieve v24 @225Ah. Now I will parallel string the other 2 so that I get 450 Ah. Over all I wil have 675Ah In total. How does that sound to u

[Sunking]

Lesson 1. DO NOT MIX BATTERIES of different manufactures, makes, models, voltage, capacity, size, age, ect....

If you have Trojan T-105, then every battery SHALL BE a Trojan T-105 with identical DATE CODES.

Lesson 2. Never Parallel Batteries unless necessary. If it is necessary for redundancy purposes in a mission Critical System. limit it to 2 parallel strings. Solar is not Mission Critical. If you need 500 AH battery, buy 500 AH cells. Lead acid batteries can be bought anywhere from 5 AH to 10,000 AH. Now here is a battery. A Collins Class sub:

196033-1205004-collins-class-submarine.jpg

[maxtshirt]

Hell no.

If you put a 50 AH battery in series with 225 AH battery, then you have a 50 AH battery and lost 175 AH. It also means you just screwed yourself out of 77% of your capacity. You just filled up your tank and it leaked 3/4 of the tank out on the ground leaving you a 1/4 tank. Does that work for you?

If all you have is 6 x 6 volt batteries leave you only one usable battery configuration 12 VOLTS. You screwed yourself and you did it all by yourself. Loose two or buy two more. If you buy two more you would be well advised to wire all 8 in series for 48 volts. Never Ever parallel batteries unless it is necessary. It is never necessary to parallel batteries.

What if I get additional 2x200ah flooded type batteries which is 12v. String them in series to achieve the 24v. The rest of the trojan 6v parallel string them with other 2 x200ah 12v. This way I get 200ah +900ah= 1100ah x24v= 26400 wat hours right. Will that work
By the way will the valve regulated lead acid be compatible with flooded batteries.

The other scenario is, what if I add another 2 trojan batteries which makes 6v x6 pcs and series string them. Will that make 36V.i think that will not be compatible with my inverter which is 24V. So what do u advise to do in this case.

[Mike90250]

Naw, it's more fun to drain the mixed bank down and reverse polarity on the 50ah battery. Gee, the lights still glow a bit

[Sunking]

Will this work out

Hell no.

If you put a 50 AH battery in series with 225 AH battery, then you have a 50 AH battery and lost 175 AH. It also means you just screwed yourself out of 77% of your capacity. You just filled up your tank and it leaked 3/4 of the tank out on the ground leaving you a 1/4 tank. Does that work for you?

If all you have is 6 x 6 volt batteries leave you only one usable battery configuration 12 VOLTS. You screwed yourself and you did it all by yourself. Loose two or buy two more. If you buy two more you would be well advised to wire all 8 in series for 48 volts. Never Ever parallel batteries unless it is necessary. It is never necessary to parallel batteries.

[Sunking]

But the thing is they all are brand new. Never been used yet. Both the flooded batteries and the AGM batteries as well.

Not our problem, it is your problem and you will learn an expensive lesson. AGM and FLA are not compatible.

[Raul]

Don't mix different size and type of batteries . Agm have different caracteristics to flooded and different amp capacity.

[maxtshirt]

NO

Do NOT mix battery types. If you don't burn something up, you will for sure destroy the weaker cells in the bank.

But the thing is they all are brand new. Never been used yet. Both the flooded batteries and the AGM batteries as well.

[Mike90250]

NO

Do NOT mix battery types. If you don't burn something up, you will for sure destroy the weaker cells in the bank.

[maxtshirt]

Series Voltage and Power Adds
Parallel Current and Power Adds

Day 1 DC Principle 101 class.

So all 4 in series and you have 24 volts @ 225 AH with 5400 watt hour capacity.
2 in series, in parallel with 2 in series (aka 2 x 2) is 12 volts @ 450 AH with 5400 wh capacity.
All 4 in parallel is 6 volts @ 900 AH and 5400 wh capacity.

Simple 5th grade math.Well Graduate College level math in the USA, 5th grade math anywhere else.

My initial 6 batteries are flooded type. however what if I add 2 x 50Ah ,AGM type, which is 12v and connect these two batteries in series so that I achieve the 24v for the inverter. Will the be okay?

And the rest of the trojan v6 x 225ah x 6 pcs string them in parallel and series string them the other 2 AGM batteries.will this maximize the capacity for the solar system.

Will this work out