[RE-wrenches] Sound Equipment Inverter

Thu Oct 22 20:39:13 EDT 2020

Not to jump on the Outback bandwagon.... But while I was there many, many
stages were outfitted with Outback inverters...  The only thing I'd watch
out for is when charging, if you have to charge while the band is playing,
you might get some 60hz noise...   Just depends on how clean the install
is, gen input...etc...

Also when you run your battery cables, twist them as you run them... that
will help cancel out some fo the RF noise you can get.

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On Thu, Oct 22, 2020 at 5:30 PM larry at starlightsolar.com <
larry at starlightsolar.com> wrote:

> I second the Outback power quality. We built a mobile medical lab that has
> Xray, ultrasound and other sensitive lab electronics. A 120kWh Li-ion
> battery package with 8 Outback 3.6kW stacked inverters @ 48 volts has been
> operating almost weekly for over 3 years.
>
> Run from Samlex. We were burned SO many times with poor quality inverters
> and worthless dealer support. If you want high quality, low cost, look at
> GoPower industrial models made by Cotek. Many sold, none come back. Able to
> start heavy loads like air compressors and circular saws.
>
> Larry Crutcher
> Starlight Solar Power Systems
>
>
>
>
> On Oct 22, 2020, at 5:07 PM, Jerry Shafer <jerrysgarage01 at gmail.com>
> wrote:
>
> Wrenches
> I have built solar powered sound stages, power trailers for both music and
> drive in movies, l only use outback, never any complaints, some acts prefer
> over dirty grid power. I had sunpower positive grounded arrays, AC-DC
> Coupled arrays. I had a guy use SMA and had all kinds of issues, mainly
> operator error. We did a full trailer, green room and light bars, powered
> drop down doors, but it was a little big.
> Jerry
>
> On Thu, Oct 22, 2020, 3:42 PM Ray <ray at solarray.com> wrote:
>
>> Hi All;
>>
>> I've just had an inquiry on building a portable sound stage and
>> recording setup.  Traditionally we've always used Exeltech, as they've
>> had the cleanest output, with background buzz on tube amps being lower
>> than grid power.  Modsine were horrible, Old Trace SWs were pretty
>> intolerable, Magnum's were usable, but still noticeably more buzz than
>> grid.  I think THD is roughly associated with the background buzz, but
>> there might be certain harmonics that are particularly problematic.  I
>> haven't gotten into looking at the separate harmonics relative to what
>> induces the most noise in these old vacuum tube circuits.
>>
>> This is a 48 v application that also needs a built in charger with
>> transfer switching.  Exeltech does not appear to have anything in that
>> department.  Any other choices?  How are Samlex?
>>
>> As always, thanks in advance for your time and expertise,
>>
>> --
>> Ray Walters
>> Remote Solar
>> 303 505-8760
>>
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