Mounting inverter outside

hillsidehillside Registered Users Posts: 108 ✭✭
I'm thinking of putting a Samlex PST3000 inverter outside under a deck canopy. It'll be protected from rain and overnight moisture and wind...until we get another hurricane. 10 miles from the ocean so salt air is a minor concern. 
At first I rejected the idea but then space and convenience took hold. Then I thought about people that put them on sailboats and trawlers where inverters exist in a humid salt air environment constantly.
This is a tropical location so...
Thoughts?
8- 235Watt panels, 2 strings in series/parallel, 4L16 Deka 6Volt, 370AH FLA. batteries, 3000W Cotek pure sine inverter, SRNE ML2440 40Amp Controller &  40 Amp Renogy controller, 24 Volt system.
4 stand alone PV arrays; 12V gate opener, 24V Dankoff rain water pumping system, 12V Shurflo rain water garden pumping, 12V bathroom LED lighting and fan.
Honda EU3000W generator for backup.

Comments

  • PhotowhitPhotowhit Solar Expert Posts: 5,727 ✭✭✭✭✭
    edited January 14 #2
    Mine have always been outside in protected enclosures/power centers along with the batteries and inverters;



    I like the battery and power center thing I mae from similar to a design I saw in Homepower or a Backwoods Solar article.


    Current setup at new place, battery is a forklift battery that started life in the battery box above and moved to new home! It's in a 'skin tight' box to the right of the power center;

    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Magnum MS4024, Prosine 1800(now backup) and Exeltech 1100(former backup...lol), 660 ah 24v Forklift battery(now 10 years old). Off grid for 20 years (if I include 8 months on a bicycle).
    - Assorted other systems, pieces and to many panels in the closet to not do more projects.
  • 706jim706jim Solar Expert Posts: 455 ✭✭✭✭
    Both battery and inverter compartments need to be ventilated
    Island cottage solar system with 2500 watts of panels, 1kw facing southeast 1.3kw facing southwest 170watt ancient Arco's facing south. All panels in parallel for a 24 volt system. Trace DR1524 MSW inverter, Outback Flexmax 80 MPPT charge controller 8 Trojan L16's. Insignia 11.5 cubic foot electric fridge. My 29th year.
  • BB.BB. Super Moderators, Administrators Posts: 32,315 admin
    Battery compartments need to be vented to release hydrogen gas (flooded cell lead acid) and some electrolyte "mist" (acid mist--Which corrodes/shorts nearby metal components).

    Inverters need to run cool (and, ideally, at a stable temperature). But they do not need "air exchange"--especially if that air is most/has salt in it... A "small" inverter in a large(r) box with good internal air circulation (don't put "hot inverter" at top of box, under self, etc.) will usually be OK... Keep box in shade/cool helps.

    Electronics in general, age 2x faster (1/2 the aging life) for every 10C(18F) over room temperature (25C/77F)... Run inverter at 95F, it will last 1/2 as long (on average).

    Temperature cycling is also a killer for electronics... Freezing in AM, >100F in afternoon sun--That can cause solder joints and component failures too.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • hillsidehillside Registered Users Posts: 108 ✭✭
    Nice setup Photowhit..
    No need to be concerned about cold temps. Overnight lows might get to mid 60's...I read that these Samlexes are Taiwan production so better than typical Chinese mfr. (think I read it here) so I'll probably put it outside on the concrete wall.
    My main concern was with humidity but inside the house it would only be marginally lower.
    8- 235Watt panels, 2 strings in series/parallel, 4L16 Deka 6Volt, 370AH FLA. batteries, 3000W Cotek pure sine inverter, SRNE ML2440 40Amp Controller &  40 Amp Renogy controller, 24 Volt system.
    4 stand alone PV arrays; 12V gate opener, 24V Dankoff rain water pumping system, 12V Shurflo rain water garden pumping, 12V bathroom LED lighting and fan.
    Honda EU3000W generator for backup.
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