Inverter noise level?
Greetings to all,
First, let me thank you for the great posts and comments on this forum. That helps solar newbies like me a lot.
I will be installing an off-grid solar system in Haiti and need some advice on the inverter I selected: Magnum MSPAE4024. The room housing the electronics (Combiner, Charge controller, Inverter, etc..) is small and shares a brick wall with a bedroom. Obviously I was concerned about equipment noise so I recently contacted Magnum about the noise level of the MSPAE4024 thinking that the fan noise could be a nuisance for the folks in the bedroom. To my surprise the Magnum tech that emailed me back said that the “humming” of the large transformer was the source of complaints not the fans! I then asked for a dB sound level of this “humming” so I could simulate and see if this will be a problem for people sleeping in the said bedroom. Magnum replied that they had no data for the sound level. Unfortunately (or fortunately?) that created some doubt in my mind and I started wondering about my choice, hence this post today.
Would any of you have an idea if the humming sound of the large transformer of any of the 4000W Magnum inverter (at its loudest) is loud enough to be a nuisance for people in an adjacent room? Could anyone with such a magnum post a recording of that sound (using a smartphone up close to the inverter should be good enough)? This would be very much appreciated. BY the way constructive comments are welcome.
I have combed the NAWS forums and most of the “expert” Youtube channels for this info but could not find anything useful.
I also did a lot of research before selecting the MSPAE4024/4448 (yes, I might use the 48V) and my top three were: Magnum, Outback and Schneider. After reading much about the three on various forums it seems as if the MS was the least problematic and is sold locally in Haiti so getting access to some level of support from the dealer should be possible.
Here are the site parameters just for the record:
2. Offgrid cottage
3. 120V/60Hz – might need 240V hence the “PAE” version of the Magnum 4024
4. 5h-8h of good sun light per day (Haiti)
5. Max AC loads: 2000W (all loads on)
6. Daytime energy needs: 1.5kWh
7. Night time energy needs: 5.5kWh
8. Only need 1 day of operation @ 7kWh. On cloudy days usage will be cut back to strict minimum ( about 3kWh)
9. 8x SW-270W Solarworld Panels (2160W)
10. Classic 150
12. 4x Rolls S550 (considering going to 8), 50% discharge.
(I ran the above numbers against (BB.) Bill’s excellent rule of thumb calculations in NAWS post #: 351264 and I should be in the bulk. I think my battery capacity is a little low for 7kWh that is why I might go to 8x S550 @ 48V and will add one more panel to have 3 strings of 3).
Thanks in advance!