Regarding 3 Power Walls PWs, more solar modules, and inverters. I hope
this is helpful, I am always going to first principles. You did not
mention what the customer expectations are. I see three common
possibilities, 1) For backup power, in which case you need generation
control, such as the AC
Keep in mind that 7.5kW is max charge/discharge for 10 sec...it is NOT the
continuous rate. This comes into play in the following scenario:
Let’s say a single Powerwall 2 is at 50% SOC and there is a utility outage
on a sunny day. The inverter is outputting 7kW AC and loads in the house
are below
You can just land the new PV to the same "generation" panel that already hosts
the 3 Powerwalls and existing PV inverter output breakers. There should be no
loads on this panel. The Powerwall AC coupled solar limit is 7.5 KW AC per
Powerwall, note AC not DC. The DC rating is irrelevant here. If
Wrenches
This customer with an orphan PW, not to compromise the factory warranty on
the batteries, it would be safest to just grid tie any additional PV and
not touch the existing system from the gateway down.
Jerry
NABCEP PV Inspector
On Fri, Apr 16, 2021, 8:38 AM Kirk Herander, VSE
wrote:
> He
Hello, I hope this helps. I have very little PW experience, the one i was
involved in had a 1741 transfer switch with grid monitoring on the mains.
When the grid failed the switch would disconnect from the Grid and connect
the PW to the panel or sub-panel. The PW charges from the AC source when
i
The manuals I have say 7.6kW(AC) per PW2
Glenn
From: RE-wrenches On Behalf Of
Jason Szumlanski
Sent: Friday, April 16, 2021 9:46 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Powerwall 2 AC PV regulation
I think the limit is now stated as 7.6kw if memory serves me right.
Jason
I think the limit is now stated as 7.6kw if memory serves me right.
Jason
On Fri, Apr 16, 2021, 12:11 PM Matt Partymiller wrote:
> They used to advocate 7.9kW AC/DC per Powerwall. That number may have
> gone down recently. Coupling an inverter on the line side of the backup
> gateway will res
Hi Kirk, the maximum actual charge rate is 5kW per Powerwall. When you
exceed that, or start getting full batteries, the Gateway tells the
Powerwalls to frequency shift to 62-66 Hz.
This takes the UL 1741 listed inverters out of the sweet spot, and they
stop or curtail production. However, predict
They used to advocate 7.9kW AC/DC per Powerwall. That number may have gone
down recently. Coupling an inverter on the line side of the backup gateway
will resolve your issue of meeting homeowner demand. Tesla will want you to
add a CT to that inverter to ensure it does not mess up their monit
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