[RE-wrenches] More Issues with Parallel Sol-Ark 15K System

[Poole, Jharen]

Hello Chris,

Stage 0 is what we would consider the state of the inverter before it reaches normal. Once you reach normal (stage 1) that is when you will begin outputting power, inverting power from solar, etc.


Best Regards,

Jharen Poole
Applications Engineer II
972-575-8875
[cid:72291b2f-f49e-4845-8dc0-6762fc80fdeb]
________________________________
From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> on behalf of Christopher Warfel via RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Thursday, November 14, 2024 8:37 AM
To: re-wrenches at lists.re-wrenches.org <re-wrenches at lists.re-wrenches.org>
Cc: Christopher Warfel <cwarfel at entech-engineering.com>
Subject: Re: [RE-wrenches] More Issues with Parallel Sol-Ark 15K System

Caution: This email is from an external source.



Can you point to a reference to what stage 0 is?  This is a new term for me. So far, have not installed multiple Sol-Ark inverters at one site.  Thank you, Chris

On 11/12/2024 12:50 PM, Poole, Jharen via RE-wrenches wrote:
Our inverters utilize CANbus communications for establishing parallel operation between multiple Sol-Ark inverters. CANbus communication operates as a serial communication protocol. In this setup each inverter in the setup is linked via a parallel communication cable forming a daisy-chain configuration. If one inverter in the chain experiences a shutdown due to a fault, the communication chain is disrupted. Consequently, the other inverters will also power down when we see this loss, ensuring system protection and safeguarding the customer’s investment.

Paralleling must be done at a stage 0 they have to sync and that is done in the pre normal mode, functionality wise having them going into sync is extremely difficult due to timing issues. It's easier to time it from a stage 0 than to do it when one unit is already running.

Maintaining synchronization between inverters is critical; if the inverters were to operate out of parallel it can result in conflicts between the operation of inverters and desynchronization of the units. This misalignment can escalate, potentially causing significant damage to one or more inverters and risking harm to other connected equipment.


Best Regards,

Jharen Poole
Applications Engineer II
972-575-8875
[cid:part1.MK5yzE0L.ZVDZmzyA at entech-engineering.com]



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--
Christopher Warfel, PE
Entech Engineering, Inc.
POB 871 Block Island, RI 02807
401-447-5773
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