Too limited I think, but at low volume, why not.
The 60Watts are laboratory conditions at 20 or 25° degrees Celsius of cells...
22v in open circuit.... limit.
I guess it will work. It all depends on how loud and what kind of music you listen to.
For good dynamic records, you can expect 20% to 25% average power of peak power.
If you use the amp below clipping, so maximum peak power of 25W+25W, average will be only 5W+5W = 10W.
10W at 18V drain only 0.55A.
For this peak power, you need 14Vpeak at a 4ohm speaker and roughly 16 to 17 at amp input.
If your panel produces 60W (18V / 3.3A) , there should be enough power, voltage and current.
Post here the results. I'm curious!
Fun stuff 🙂
(nice sea color!)
Put a large 10000 uf 35v cap on the solar panel and connect to anp.
The voltage will sag a bit if played loud .
Measure voltage on cap to ensure its below 24v unloaded.
The voltage will sag a bit if played loud .
Measure voltage on cap to ensure its below 24v unloaded.
@ron68
yes it works!
on compressed music like Mark Knopfler Sailing to Philadelphia and put up pretty loud it distorts a bit but not annoying, so listenable. On less compressed music it goes loud and less distorted.
yes it works!
on compressed music like Mark Knopfler Sailing to Philadelphia and put up pretty loud it distorts a bit but not annoying, so listenable. On less compressed music it goes loud and less distorted.
I will make a portable speaker but a mono one so if the amp is doing only one channel there will be even more amperage available as one channel will run idle.
on non heavy load and full sun the panel gives 20.1 volt
thats the description on the backside of the panel.
Everything above 18 volt is great
thats the description on the backside of the panel.
Everything above 18 volt is great
Solar panel has to move with the sun.
Dire Straits "Lions" can go very loud
Dire Straits "Lions" can go very loud
Cool! (or should I say hot?🙂)
Yes, when listening to more compressed music such as "DJ material" the average power increases a lot and demands much more current from the panels.
Dire Straits Lions has many empty spaces with drums peaking so the average power is low.
The other song has less empty spaces, less peaks, more voices that sustain a higher average power.
Thanks for posting!
Yes, when listening to more compressed music such as "DJ material" the average power increases a lot and demands much more current from the panels.
Dire Straits Lions has many empty spaces with drums peaking so the average power is low.
The other song has less empty spaces, less peaks, more voices that sustain a higher average power.
Thanks for posting!
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See the analysis of Peak versus RMS of the two songs Lions and Sailing to Philadelphia.
I normalized 10sec of each song and then got the RMS for them.
A lot of difference on RMS values: -17dB versus -10dB
I normalized 10sec of each song and then got the RMS for them.
A lot of difference on RMS values: -17dB versus -10dB
just connect an identical panel in paralell, with a different direction for example one south-east and one south west to cover the day.
@basreflex
Two times 30 watts is excessive loud and enough. So the amp is powerful enough to drive the 30cm speakers (fullrange, no crossover, but aluminium sandwich on paper cone).
The panel will find its place on the backside of a transport aid like this
and a mono loudspeaker box again with 30cm driver and piezo will be "carried" at the front.
It will be transportable like this. So I can always adjust the panel to the sun just by moving it around and directing to the sun.
In germany there is a "Bollerwagen" tradition for people feasting on "fathers day" "Vatertag", but not available here:
@ron68
at the moment its quite windy and more cold than usual here in Safaga (Egypt). There are "winters" which are warmer than usual but this time its "colder" than usual: 13 degrees at night and 20 during the day, but you always have sun. It literally never rains here.
Being somewhere protected from the wind you can go always having a bath in the sun and it gets warm.
@stocktrader200
measured 20 volts on not loud music so this panel will never exceed the amplifiers voltage headroom. I have put 40.000 uF. Thats all the capacitors I had lying around and now they can do something productive.
Two times 30 watts is excessive loud and enough. So the amp is powerful enough to drive the 30cm speakers (fullrange, no crossover, but aluminium sandwich on paper cone).
The panel will find its place on the backside of a transport aid like this
and a mono loudspeaker box again with 30cm driver and piezo will be "carried" at the front.
It will be transportable like this. So I can always adjust the panel to the sun just by moving it around and directing to the sun.
In germany there is a "Bollerwagen" tradition for people feasting on "fathers day" "Vatertag", but not available here:
@ron68
at the moment its quite windy and more cold than usual here in Safaga (Egypt). There are "winters" which are warmer than usual but this time its "colder" than usual: 13 degrees at night and 20 during the day, but you always have sun. It literally never rains here.
Being somewhere protected from the wind you can go always having a bath in the sun and it gets warm.
@stocktrader200
measured 20 volts on not loud music so this panel will never exceed the amplifiers voltage headroom. I have put 40.000 uF. Thats all the capacitors I had lying around and now they can do something productive.
in the shadow the panel drops to 19.7 volts and mid loud music does not stop playing but still works distortion free