Grid tie inverter how to control amps used on battery

[ice2484]

I am wanting to put grid tie inverter on battery power at night.
How can i control the amps the power inverter uses?

[SunEagle]

I am wanting to put grid tie inverter on battery power at night.
How can i control the amps the power inverter uses?

Welcome to Solar Panel Talk

I am not sure what you are looking for concerning a "grid tie" inverter that gets it's power from batteries.

Most Hybrid solar battery grid tie systems have controls that monitor battery charging and usage and I believe can turn off loads but they are very expensive.

The less expensive way to control the amount of amps the inverter draws from the battery is to use a "fixed amp" load and a timer that opens the circuit after the allotted hours I can run that load.

If my total fixed load uses 3 amps and I can only use about 15Ah from my battery then I would have to turn off my load at or before 5 hours is up. Just remember that the inverter also uses the battery so you will use more than 15Ah in the 5 hours of run time so maybe run your load for 4.5 hours.

[Mike90250]

String style inverters use 300-500VDC from the panels. Micro inverters need about 60V from panels.

But how would you recharge the batteries ?

[Sunking]

Where do you live?

In the USA power from the POCO on average cost 11.2-cents per Kwh. Power from batteries cost 50 to 60-cents per Kwh. So my question to you is : Why do you want to pay 4 to 6 times more from power from batteries rather than from the POCO?

[russ]

Biloxi, Miss - They do things different there?

[Sparkskard]

which inverter do you have or going get ..

Some of the older SMA SB well allow you to set MPPT to a fix DC Value , when u should be able very the input to inverter, but this does may change the inverter to a true demand type inverter found on non-grid tie or micro grid tie ie paralleling inverter ,, tie them to grid .. ( with AC generators can be paralleled as the load demand ) this should the same with inverter if they were designed right ,, there to type MPPT (PV ) and demand inverter ( run off batt.) I have not seen one that well do both weel and easy .. OutBack have one that close for $4k for 8Kw unit..

Make sparks fly ~~~

I am wanting to put grid tie inverter on battery power at night.
How can i control the amps the power inverter uses?

[Sparkskard]

how and where did you come with battery cost

how, where did you come up with cost of Batteries ?? $.50 to $.60 per KWhr seam high .. I done the math,, but I think it should be lower .. How long are thinking Bat. well last , cost , etc.. ??

Let the sparks fly ~~~~

Where do you live?

In the USA power from the POCO on average cost 11.2-cents per Kwh. Power from batteries cost 50 to 60-cents per Kwh. So my question to you is : Why do you want to pay 4 to 6 times more from power from batteries rather than from the POCO?

[russ]

how, where did you come up with cost of Batteries ?? $.50 to $.60 per KWhr seam high .. I done the math,, but I think it should be lower .. How long are thinking Bat. well last , cost , etc.. ??

Let the sparks fly ~~~~

You state your assumptions first.