Can 4 Growatt 3000watt inverter/charges handle this load?

severin20 · May 4, 2021

I'm helping with a solar design.

Appliances are:
Hot water heater
Large AC
Small AC
Electric stove/oven
Washer
Dryer
Dish Washer
Fridge
Freezer

Currently his power usage is about 17kwh per day.

I recommended 4 growatt 3000watt hybrid inverters run in parallel, but maybe 6 would make more sense?

I'm concerned about the inverters not being able to handle multiple surges at the same time.

Is this a bad idea in general to recommend growatt hf inverters for this large of an application?

I feel confident in sizing the rest of the system, but the inverter I'm not sure of. What would you recommend?

MichaelK · May 4, 2021

I think you'll be better off with a real inverter. Look at Magnum, Outback, and Schneider. 500-1000Ah at 48V is what you want.

Look at utilizing propane for heat applications like hot water, and the kitchen stove. Trying to run an electric stove on solar is just foolish.

A propane water heater with an added diversion circuit for fully charged batteries might be a viable way to soak up extra power.

It is really not very realistic to expect solar to provide you with a completely seamless transition from grid to off-grid. Compromises must be made to fit solar into a 21'st century lifestyle.

jasonhc73 · May 4, 2021

That will work great.

I have essentially the same thing right now on my house with two LV6548 MPP-SOLARs.
If you are concerned about the surge load, it's very easy to stagger everything by using smart switches.
I have one on my freezer, refrigerator, and water cooler. I give them all a 30-second delay between devices. I never come close to overloading my setup.

If you can put the GroWatts in 240v Split Phase, I think it would make more sense than all 120V single-phase.

https://www.amazon.com/BN-LINK-Monitoring-Function-Compatible-Assistant/dp/B07CX5KLXN

severin20 · May 4, 2021

jasonhc73 said:
That will work great.

I have essentially the same thing right now on my house with two LV6548 MPP-SOLARs.
If you are concerned about the surge load, it's very easy to stagger everything by using smart switches.
I have one on my freezer, refrigerator, and water cooler. I give them all a 30-second delay between devices. I never come close to overloading my setup.

If you can put the GroWatts in 240v Split Phase, I think it would make more sense than all 120V single-phase.

https://www.amazon.com/BN-LINK-Monitoring-Function-Compatible-Assistant/dp/B07CX5KLXN

Ok, so all 4 units I'd run at 240v split phase? What's the advantage of that over 120v single phase? I'm lacking some basic understanding of these concepts I suppose. Thank you for helping me.

severin20 · May 4, 2021

MichaelK said:
I think you'll be better off with a real inverter. Look at Magnum, Outback, and Schneider. 500-1000Ah at 48V is what you want.

Look at utilizing propane for heat applications like hot water, and the kitchen stove. Trying to run an electric stove on solar is just foolish.

A propane water heater with an added diversion circuit for fully charged batteries might be a viable way to soak up extra power.

It is really not very realistic to expect solar to provide you with a completely seamless transition from grid to off-grid. Compromises must be made to fit solar into a 21'st century lifestyle.

Feels like 1000ah at 48V is potentially still not enough for what we are trying to power. I hear you on the issue of running an electric stove on solar, stupid but with all the appliances already bought and this person trying to save money maybe hmmm... I appreciate you commenting

jasonhc73 · May 4, 2021

severin20 said:
Ok, so all 4 units I'd run at 240v split phase? What's the advantage of that over 120v single phase? I'm lacking some basic understanding of these concepts I suppose. Thank you for helping me.

Electric water heater
Electric ranges
Electric clothes dryers
Electric central air conditioners

All operate on 240V.

MichaelK · May 5, 2021

severin20 said:
Ok, so all 4 units I'd run at 240v split phase? What's the advantage of that over 120v single phase? I'm lacking some basic understanding of these concepts I suppose. Thank you for helping me.

A modern American (North American) home is wired for what's called split-phase AC. There are typically three wires (plus ground), L1, L2, and N. L1 to N = 120VAC. L2 to N = 120VAC. L1 to L2 =240VAC. So, an American home can have both 120V and 240V appliances. All the inverter companies I mentioned above make a split-phase unit you can wire directly into your house panel.

schmism · May 5, 2021

severin20 said:
but with all the appliances already bought and this person trying to save money

I dont see how spending $20K-$30K is a money saving venture.

Supervstech · May 6, 2021

schmism said:
I dont see how spending $20K-$30K is a money saving venture.

A better way to say this in a member’s thread would be to ask how, not just state you don’t see it.
I can imagine multiple ways this would be a cost saving plan.
everyone doesn’t live where you do.

Prefersdirt · May 10, 2021

I have a GroWatt. I would not recommend going with 4 of them. Too much overhead energy use to keep the system on. Get Tier 1 inverters.

Can 4 Growatt 3000watt inverter/charges handle this load?

severin20

New Member

MichaelK

Solar Wizard

jasonhc73

Cat herder, and dog toy tosser.

severin20

New Member

severin20

New Member

jasonhc73

Cat herder, and dog toy tosser.

MichaelK

Solar Wizard

schmism

Solar Addict

Supervstech

Administrator

Prefersdirt

Solar Enthusiast

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