With a Grid tied hybrid, can you specify how much power from the batteries is discharged over time?

[tacomaguy20]

I'm still working on my initial design. Was thinking of getting the Growatt Hybrid SPH10000TL- HU-US or an EG4 hybrid but I had a question about how the batteries can discharge power. My utilities use a demand based plan during peak hours so it's best I use as little power as possible during these 6 hour windows. I want to use the batteries to supplement my AC power during this time but if the batteries are fully discharged before the 6 hours are up, that's worse than if they slowly discharged for the full 6 hours. I'd rather have 6 hours of less power fed steadily into the system than 5 hours of full power and then 1 hour of none. Does that make sense and is this possible?

In this scenario, pretend I'm not using any solar PV input.

 

[1201]

Yes, you use the time of use function and you can set your charge/discharge times and the amount of power you want to use.

 

[tacomaguy20]

Yes, you use the time of use function and you can set your charge/discharge times and the amount of power you want to use.

Okay cool, I was thinking of starting off with maybe 2 batteries and then slowly getting more. I'm sure that's not enough to run my full load during those 6 hours but if it can help reduce my overall demand for the 6 hours, that would be ideal until I decide to buy more.

 

[1201]

Okay cool, I was thinking of starting off with maybe 2 batteries and then slowly getting more. I'm sure that's not enough to run my full load during those 6 hours but if it can help reduce my overall demand for the 6 hours, that would be ideal until I decide to buy more.

Two 280ah or 100ah?

You could also use some manual load management during peak times to help.

Of course adding pv would help

 

[tacomaguy20]

Two 280ah or 100ah?

You could also use some manual load management during peak times to help.

Of course adding pv would help

I was actually thinking of two 100ah or maybe one 280ah to start. I'm sure I'll get PV eventually. I'm just thinking it might be easier to start off with batteries by themselves since my off peak power costs are fairly cheap and not sure I want to go through putting panels on the roof yet. Then as I'm saving up money, I can expand.

 

[1201]

I was actually thinking of two 100ah or maybe one 280ah to start. I'm sure I'll get PV eventually. I'm just thinking it might be easier to start off with batteries by themselves since my off peak power costs are fairly cheap and not sure I want to go through putting panels on the roof yet. Then as I'm saving up money, I can expand.

Batteries and inverter are definitely easier to start off with. A diy battery is about 60-70% of storee bought so you might consider that to save some money.

Pv can be easy though if you have the space. Do you have a shed? Throw 6 or 8 panels up there. Heck you can put panels on the ground with a ballast mount system. Very easy. But i hear you. If it makes sense to start with battery first nothing wrong with that

 

[tacomaguy20]

Batteries and inverter are definitely easier to start off with. A diy battery is about 60-70% of storee bought so you might consider that to save some money.

Pv can be easy though if you have the space. Do you have a shed? Throw 6 or 8 panels up there. Heck you can put panels on the ground with a ballast mount system. Very easy. But i hear you. If it makes sense to start with battery first nothing wrong with that

Yeah PV will come eventually.. I might just do ground mount or something. But the problem with a DIY battery is that my setup needs to be approved by the power company since it's grid tied and the batteries have to be on the CA approved list. I'm sure I could get away with something temporarily but I'd rather just do everything by the book.... and have a warranty. 30% is significant but peace of mind if something fails is probably worth it.