Seeking help from the solar and battery experts for AC Charging designs

[lumencache]

Hello. While solar charging of batteries is our ideal solution, I need some good AC charging and battery guidance. Presently, our system requires 12v and/or 24v output and about 3000-4000W.

Are there any sample systems showing components and design for handling this kind of power levels charged and maintained from AC chargers?

[Sunking]

Only thing you are going to find at that power level are commercial charging systems used for Telecom battery plants.

[lumencache]

I was thinking a couple of iota dls units in parallel.

[Mike90250]

most household circuits will not take 3,000 watts. You would need a special 240V outlet.
240V @ 3kw = 12.5a 4kw = 16.6a

[lumencache]

I figured multiple AC ckts. See parallel design here: http://www.iotaengineering.com/pplib...l_Charging.pdf

Would like to have one large lead-acid battery pack so I need some advice there as well as the connecting hardware, breakers, fuses, etc.

There would be multiple loads through a low-voltage cutoff device like the Samlex BG60 so I don't over draw the battery.

Each of my PDMs (power distribution modules) draws about 10-15A. Max is 20A at 12V (each unit). About 1/10th of the power is more than sufficient for emergency lights so I need 1/10th of the full load amps available from the battery for at least 90 minutes.

Is there a good equation for this and what batteries can take this kind of power?

[Sunking]

You can find lots of 100 amp+ 12 and 24 volt chargers on the surplus Telecom market. But they are all going to be 208/240/277/480 VAC. No such thing at 120 volt

[Mike90250]

Other choice is an inverter with an integrated charger ?
Maybe a golf cart or forklift charger ?

[Sunking]

I figured multiple AC ckts. See parallel design here: http://www.iotaengineering.com/pplib...l_Charging.pdf

Just where do you intend to get all these dedicated circuits from. They do not exist in your home or business unless you specifically specified them to be installed at the time of construction. The only ones required by code in new home construction are:

Refrigerator
Dishwasher
2 appliance circuits on kitchen counter tops for micro and toaster oven.
Dinning Room Buffet
Washing Machine in laundry room.

No EC is going to install more than required for a spec house unless it is specified and paid for. If your home is older than say 10 years doubtful you have many if any dedicated 120 volt circuits as they were not required.