Multimode inverter [RE-wrenches]

[Bruce Roush]

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William,
I can't imagine that the MM5000 on your shelf is worth much to anyone 
unless Beacon Power would give you something. One way to get some use 
out of it might be to install it on this customer's array (if you aren't 
happy with the salvage offer from Beacon). You might get a few years out 
of it, or not! It will probably fail (like the other ones) and then you 
will be out there again.

To install the SW outside you would probably be looking at getting the 
PM enclosures and remotes for the SW (and GTI). The Outback is an option 
that would perform well and be outdoor rated if you can get a PS1 setup 
soon.

One other option you might not have considered is replacing the MM5000 
with a Beacon M5. This should be the easiest swap from the mechanical 
standpoint. This product has had major improvements in hardware and 
software from the patchwork upgraded MM5000's. We have supplied more 
than a few of these units to failed MM sites and have had no problems 
with any of them (knock on wood). We have one on the wall at our 
facility that has been working reliably since it's installation over a 
year ago. If you puchased the original MM5000 from us, we will do our 
very best to make this the most affordable solution. Please contact me 
offline if you would like to explore this option; it may give the 
customer a reliable and more seemless fix when compared to the other 
choices you have discussed.

Bruce Roush
Solar Depot
bruce at solardepot.com


William Korthof wrote:
> 
> I have a customer from back in 2002 whose MM5000 inverter just bit
> the black, gooey, smokey, smoldering....dust. Luckily the inverter was
> installed outside, so the toxic black cloud of inverter companies gone
> south only engulfed the yard and not the garage/kitchen/living room.
> 
> Luckily, this is our last customer with a MM...and our third MM to go
> bad on us. This one definitely sizzled more the others, with that deep
> putrid black residue totally encrusting the interior power section.
> There are no hints to the cause of failure---three years working, now
> failure. We did not take up Beacon's "upgrade" trade-in offer, but I'm
> not convinced that would have been a good deal... any other dealers
> with MM products still in the field? Is this fiery failure mode common?
> 
> This customer has a 4.3 kW array (36 KC 120) and a 19
> 
> We happen to have one remaining, old but operative MM inverter.
> So for this customer, we have a few choices:
> 1) swap in our remaining orphan MM inverter
> 2) replace with a Trace SW5548 inverter (we have one on our shelves)
> 3) replace with an Outback inverter
> 4) replace with a Sunny Island
> 
> The replacement will basically be at our expen$e, but we want to
> make sure this customer can remain satisfied. Any suggestions?
> 
> 
> William Korthof
> Energy Efficiency Solar
> 
> 
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> 

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