Server battery

[mjcs]

I'm looking to build a system for my servers so I can take advantage of time of use billing from my power company as the TOU billing is brutal here. I am looking for either an all-in-one system or battery + controller + inverter system. My servers use about 11.5 kWh of power per day. I'm looking to be able to at least power that and have at least a 30% buffer.

My requirements are as follows:

• Pure sinewave inverter with 120 V 60 Hz output
• Inverter that has enough wiggle room in constant wattage output
• Ability to ground the unit for safety
• Ability to charge the unit during off-peak hours
• Ability to charge the unit when it gets below a threshold (30% maybe)

The last 2 items could be done with a smart home power switch and some RS232 monitoring I think but maybe there are charge controllers that can do it as well.

I don't care if the batteries are rackmount (but that is preferable) but the ability to monitor the voltage I think would be critical here.

 

[hwy17]

TOU differential isn't so high here that batteries will pay off on their own.

Anyway, your requirements are met by a lot of hardware on the market. SW4048, 6000XP, maybe even EG4 3kW.

 

[mjcs]

Are there simpler/cheaper devices that will do this. a 3kW unit seems overkill for my needs.