[RE-wrenches] Enphase- How big is too big

[Jason Szumlanski]

We have a systems with over 200 microinverters installed, and they work
great. Enphase has a fair labor reimbursement policy for warranty swaps.
While we have swapped a fair number of micros in the past, problems are
becoming fewer and farther between, and we are compensated for this
work.

 

I would have no problem recommending a system of 100kW or more,
especially if the physical serviceability of the system is good (easy
access, ground mount, etc.)

 

Jason Szumlanski

Fafco Solar

 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Keith
Cronin
Sent: Monday, January 16, 2012 2:35 PM
To: RE-Wrenches
Subject: [RE-wrenches] Enphase- How big is too big

 

Recently, I was asked, how big is too big- to use micro inverters vs a
string inverter for a small commercial system.

 

With my own experience, we did a 10kW system and the owner was ecstatic
with the level of detail and the reporting, as over the last couple of
years, we had a few inverters that seemed to not be reporting, which
Enphase replaced, regardless of why they weren't functioning.

 

Yes, we had a few trips to the site to swap out and replace, but overall
I believe knowing that its working vs guessing that everything is
working is better. 

 

As string inverters become smarter- aka, can identify under performance
via technology, I'm left to wonder, how many systems are deployed out
there that I've done or others over the last 15 years or so and how many
are working, as designed, as the likelihood of having access to the data
could be non-existent.

 

So, if a prospect wants to have the granularity and is ok with the
prospect of micro inverter failures, then how big would you make the
system? 10kW, 20kW, 30kW?

How many modules? 30, 50, 100? (same question, different approach)

 

Appreciate it.

 

Aloha,

Keith

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