[RE-wrenches] Overpowered mppt landing in a SMA-41?

[Harry Mahon]

Bill - you got it - the inverter will hold at the 10A limit. When this limit is achieved, you will see a log entry for "derating mode"

The Isc limit for the US-41 is 18A per channel, this is the limit you cannot exceed.

Not sure if the US-41 is installed already? If you think you will have good conditions often, the SBSE US-50 line has 15A operating current limit per channel.

Best regards -
Mike


Michael Mahon (he/him)
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From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Bill Battagin via RE-wrenches
Sent: Saturday, October 19, 2024 7:17 PM
To: Glenn Burt via RE-wrenches <re-wrenches at lists.re-wrenches.org>
Cc: Bill Battagin <frenergy at psln.com>
Subject: [RE-wrenches] Overpowered mppt landing in a SMA-41?


Hey folks,

                A customer I installed a system for 18 years ago now wants an upgrade, partly due to the Mitsubishi 170's high failure rate and the purchase of an EV.  The Mission PVs I'm looking at (at a deal I 'can't' refuse) have a rated current of just over 13 amps, a string of 10 is easily below the Voc limit.  The specs for the SB6.0-1SP-US-41 show a max current per mppt of 10 amps.  I've never "pushed" this max amps limit quite this much, is there a problem?  I assume the inverter will just clip the input to 10 amps midday.

        Would love some input, thanks,

Bill

Feather River Solar Electric

Bill Battagin, owner

4291 Nelson St. (Shipping)

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