If I wanted to build my battery bank in the next 45 days... who/what/when/where/how?

[ericfx1984]

Ok so I would like to build something that is 12v, at least 200ah, at minimum 200amp bms... I actually like the idea of smaller battery banks, with their own smaller BMS running in parallel, I figure if one battery goes down I can still run at reduced capacity... I think this would also allow me to run a much cheaper BMW on each bank and still handle my high amperage requirements

I am not married to the idea of several smaller battery banks in parallel, just seems like it makes sense

I would like to get closer to 300ah if possible... but 200ah is the bared minimum

I would like to build within the next 45 days

So WHERE do I buy parts... what SHOULD I get... I understand how to build it... I just dont know WHERE to throw my money at... thanks in advance

 

[markansas]

Ok so I would like to build something that is 12v, at least 200ah, at minimum 200amp bms... I actually like the idea of smaller battery banks, with their own smaller BMS running in parallel, I figure if one battery goes down I can still run at reduced capacity... I think this would also allow me to run a much cheaper BMW on each bank and still handle my high amperage requirements

I am not married to the idea of several smaller battery banks in parallel, just seems like it makes sense

I would like to get closer to 300ah if possible... but 200ah is the bared minimum

I would like to build within the next 45 days

So WHERE do I buy parts... what SHOULD I get... I understand how to build it... I just dont know WHERE to throw my money at... thanks in advance

two car agm batterys would do it 1000 amp . less than 400 for that . in the long run go lithum. cheaper yet . its because of how long they last .. agm 5 years.. and the other 15 years. what can you afford to start with.

 

[ericfx1984]

two car agm batterys would do it 1000 amp . less than 400 for that . in the long run go lithum. cheaper yet . its because of how long they last .. agm 5 years.. and the other 15 years. what can you afford to start with.

I plan to go lithium... just not sure WHAT I can build in the next 45 days... it's getting cold and i need the power soon

 

[Struc]

I plan to go lithium... just not sure WHAT I can build in the next 45 days... it's getting cold and i need the power soon

Are you in the US? Parts availability is very much dependent on where you live.

Assuming US, you can get Daly BMS units off Amazon these days (for around $30 more than from China).

For Battery cells, take a look at http://www.powerwholesale.net/ and see if they have what you need in stock in the TX warehouse. I know they just got a shipment of EVE 280ah cells because mine just shipped a few days ago. I've been dealing with Amy Zheng <amy@docanpower.com> over there and she has been very responsive.

 

[FilterGuy]

Where do you live? Your options in each country will be different.

In the US.
If @OverkillSolar has the JBD in stock... they can get a decent 120A 12V jbd BMS pretty quickly.

Cells can be a challenge to get quickly. I saw some on AMAZON, but I have no idea how reputable they are.

There are various outlets that often have US stock for cells....but I have not kept track of who has what.

 

[Rocketman]

It is always best to start with your loads.

Two types of loads: Ah (amp hours) which is how long the batteries will last. Amps - which is the highest load that is needed to start some load

Why 12v? Are you in an RV? Often 24v is better (48v is even better if using a bigger inverter).

So what will you be running with the batteries?

 

[ericfx1984]

It is always best to start with your loads.

Two types of loads: Ah (amp hours) which is how long the batteries will last. Amps - which is the highest load that is needed to start some load

Why 12v? Are you in an RV? Often 24v is better (48v is even better if using a bigger inverter).

So what will you be running with the batteries?

I already have the loads figured out... 12v because thats what is already there... not going to fully rework this system, just need it to squeak but till summer hits... see my sig for existing system specs, should make more sense

 

[FilterGuy]

It is always best to start with your loads.

Two types of loads: Ah (amp hours) which is how long the batteries will last. Amps - which is the highest load that is needed to start some load

Why 12v? Are you in an RV? Often 24v is better (48v is even better if using a bigger inverter).

So what will you be running with the batteries?

All good questions that need to be understood *before* purchase.

 

[paulopower]

If you are thinking to buy more than 3 12V battery. Please go for 24V.

You will find that it is lot easier and cheaper to work with.

Less amperage means, less wire sizing and fuse, and all those little gadgets.

 

[dr.diesel]

For Battery cells, take a look at http://www.powerwholesale.net/

This is the first I've heard of this place, is their reputation good?

 

[ericfx1984]

Where do you live? Your options in each country will be different.

In the US.
If @OverkillSolar has the JBD in stock... they can get a decent 120A 12V jbd BMS pretty quickly.

Cells can be a challenge to get quickly. I saw some on AMAZON, but I have no idea how reputable they are.

There are various outlets that often have US stock for cells....but I have not kept track of who has what.

I am in the USA, right smack dab in the middle of the country

 

[FilterGuy]

I am in the USA, right smack dab in the middle of the country

Smith County, Kansas?

 

[upnorthandpersonal]

This is the first I've heard of this place, is their reputation good?

Check these links:

Good review on supplier.

I purchased 4 280 catl from @Amy Zheng from power wholesale, All of my contact with her was done through Facebook messaging. I purchased from usa warehouse and received them in 3 days. The packaging was excellent, packed 2 per box. Batteries arrived with no damage and no bloating. Voltage...

diysolarforum.com

Our NEW GO-TO LiFePO4 vendor...09.20.21

So my boss this morning stopped by the DONCAN warehouse (Doncan Technology (Shenzhen) Co) in Houston TEXAS to pick up (64) EVE-280Ah batteries that we had ordered literally 48 hours earlier. From beginning to end this has been a 10 out of 10 process. First it started with Jenny Wu of Doncan...

diysolarforum.com

 

[Struc]

This is the first I've heard of this place, is their reputation good?

Yes, there are quite a few threads going around. Search for that URL or Docan. They are a China company who sells on Alibaba, but is now shipping out of a warehouse in TX as well (when they can keep stock).

 

[markansas]

all in one

12V 400AH Battery by EG4

DESCRIPTION SPECS & MANUAL VIDEOS SHIPPING 12V 400AH Battery by EG4 GYLL HAS REBRANDED TO EG4. SAME GREAT BATTERY, DIFFERENT NAME. This EG4 12.8V 400AH (12V) LiFePo4 5.12kWh Lithium Battery is a premium battery with only 16 prismatic 3.2V cells in series versus the typical 300+ AA-Style Lithium...

shop.signaturesolar.us

 

[Sback]

I am in the USA, right smack dab in the middle of the country

Contact @Amy Zheng she will help you. Her English is good and she is very easy to chat with.

 

[FilterGuy]

all in one

12V 400AH Battery by EG4

DESCRIPTION SPECS & MANUAL VIDEOS SHIPPING 12V 400AH Battery by EG4 GYLL HAS REBRANDED TO EG4. SAME GREAT BATTERY, DIFFERENT NAME. This EG4 12.8V 400AH (12V) LiFePo4 5.12kWh Lithium Battery is a premium battery with only 16 prismatic 3.2V cells in series versus the typical 300+ AA-Style Lithium...

shop.signaturesolar.us

That is not likely to meet the '45 day' requirement.

 

[markansas]

12V 100AH Water-Proof Bluetooth Battery by EG4

This is a listing for: 12V 100AH Water-Proof Bluetooth Battery by EG4 This EG4 12.8V (12V) LiFePo4 1.28kWh Lithium Battery with 100AH is a premium battery with only 4 prismatic 3.2V cells in series versus the typical 100+ AA-Style Lithium battery cells in series. All Cells are WELDED together...

shop.signaturesolar.us

 

[markansas]

 

[FilterGuy]

12V 100AH Water-Proof Bluetooth Battery by EG4

This is a listing for: 12V 100AH Water-Proof Bluetooth Battery by EG4 This EG4 12.8V (12V) LiFePo4 1.28kWh Lithium Battery with 100AH is a premium battery with only 4 prismatic 3.2V cells in series versus the typical 100+ AA-Style Lithium battery cells in series. All Cells are WELDED together...

shop.signaturesolar.us

Check to make sure they are in stock before you order, but otherwise that looks like a good option for the need.