I have a moderately sized electrical panel and over the course of the last 8 years have done a full house rewire, and installed heat pumps (and when I say 'I did X', I mean I wrote the check to the electrician). At the beginning the panel was relatively empty because the house was completely under-wired. Now, all the breaker slots are completely full, some with double breakers. Additionally, the system is set up with the mains wiring coming in through a 220v breaker instead of through the top bus bars, which seems weird to me.
Within the last year I put in the Sense energy monitor, which involves putting two inductive clamps over the mains feed. I was able to do it, but it was a really tight fit to get it in place. https://sense.com/installation
I'm about to have a solar install done, and they'll have an electrician in anyway doing the hookup. They're willing to upgrade me to a larger box for the cost of 1 days work of an electrician and his apprentice, $1200.
The solar company seems to think they can get the solar installed in my existing box, with no problems. However, I think this might be a good opportunity to get a larger box so I don't have to worry about it in the future.
I have several opinion questions.
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Should I enlarge my box? In theory, I don't plan to add any more circuits to the house, but this sounds like a good opportunity to future proof. On the other hand, I don't want to throw $1200 at something if I don't have to.
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Should I insist on the mains being moved to what I believe is the more standard top-center point directly on the bus bars?
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Does $1200 and 1 day's work for 2 guys sound like a reasonable estimate for replacing the box in the Boston area? I'm not asking if someone could do it for $100 cheaper, but, just a basic call on whether this price seems reasonable?
Thanks
::edit::
Decided to pull the trigger and will be getting a contract amendment to the solar job to bundle the box upgrade. Thanks everyone.
Best Answer
Yes I think you should upgrade the panel now, but that is really just an opinion, partly based on disliking split breakers. Making changes after the solar install could get more complicated.
If you decide not to change the panel then no, you shouldn't move the service feeder wires to the directly to the main lugs. You need overcurrent protection for the panel. I do question if the existing stab in "Main Breaker" is Listed for use as Service Equipment, usually some type of screw or bracket is present to secure stab-in breakers to the panel https://www.gexpro.com/usg/Root-Category/Power-Distribution/Circuit-Breakers/Circuit-Breaker---Accessories/Hold-Down-Kits/GE-THQLRK1-Main-Breaker-Retainer%2C-PowerMark-Gold%2C-12-42-Circuit%2C-THQL/p/79046 , I just don't see it. Depending on panel model you may be able to get a kit to mount a main breaker to replace the main lugs.
$1200 sounds within reason, but that's not a two men for 8 hour price or job.