power supply for busking

[seizethymemery]

I'm looking for a good power supply to power an amp for busking (165 watt amp, the amp being a laney richter RB4) any good suggestions?

 

[agedhorse]

The inverter portion should be “pure sine wave”, not “modified sine wave”.

 

[Luckydog]

Jackery has some models that would work, albeit expensive

 

[Wasnex]

You find find this helpful: Battery-Powered Mayhem! (Jackery 300)

 

[Old Garage-Bander]

I'm looking for a good power supply to power an amp for busking (165 watt amp, the amp being a laney richter RB4) any good suggestions?

I ran my Rumble 200 combo off of an Oupes 600. Short test, but worked fine.
Compare price and battery technology to the Jackery.
Best Solar Powered Generator - OUPES Power Outdoors

 

[Aloe]

Jackery has some models that would work, albeit expensive

seconding this recommendation (I do have different Jackery and Ecoflow models in use, albeit not for busking).
a Jackery Explorer 500 should sustain a 165W load for like 2-2.5 hours and have some spare room not to discharge it completely. it will take the battery ~500 cycles to degrade to 80%.

if the OP needs more time, uhm, I'm afraid, that's Explorer 1000 (Pro or non-Pro, doesn't matter, except Pro will charge notable faster from an outlet).

 

[Luckydog]

Also, if you are willing to run a small generator, Honda has some great choices, with proper power to run computers etc. Some of them are so quiet you can barely hear them running a few feet away. I have a 6500 watt Honda that I have used when my power has been out a few times at home. Very fuel efficient and quiet. I used that a couple times for some boondock-style gigs. It can handle a whole band, and quietly. I think if you are busking you need to consider weight vs power to get the right balance for your needs. There is a lot of stuff out there that didn't exist 25 years ago.

 

[Wasnex]

The smallest Jackery I recommend is the 240. It's the smallest pure sine unit they offer.

Weight and Output Specs
240

Weight: 6.6lbs/3kg
Constant: 200W
Surge: 400W
Capacity: 240Wh​

300

Weight: 7.1lbs/3.2kg
Constant: 300W
Surge: 500W
Capacity: 293Wh​

500

Weight: 13.32lbs/6.04kg
Constant: 500W
Surge: 1000W
Capacity: 518Wh​

1000

Weight: 22.04lbs/10kg
Constant: 1000W
Surge: 2000W
Capacity: 1002Wh​

For busking you need to consider the weight. If the weight is too high you will need some sort of cart, which will make navigating over steps and curbs more difficult. I would consider how much surge capacity is required for your amp to turn on and how much run time you need. Weigh these requirements against the size and weight.

I chose the 300 as the best compromise, but your needs and expectations may be different than mine. I ruled the 240 out because I was concerned the 400W surge would not be enough for the amp to turn on. After experimenting with my GK 700RB, I think the 240 would probably work fine, but I have not put it to test.

The 240Wh rating is based on how much power can be supplied continuously for 20hrs.
240/20 = 12W.

The unit is rated to provide 200W continously and 400W surge. Hower, if the power is pulled out faster than this you have to derate the capacity/run time. Jackery recommends 85% but you could use 75% to get a more conservative estimate.

Let's assume the average power your amp pulls is 80W. Keep in mind you would use the average power required by the Laney RB4 for your estimate.

Estimated Run Time Jackery 240 with 80W of current draw = 240/80 = 3 hrs.

Now derate the answer by 75% and 85%:
3 x 0.85 = 2.55hrs (converted to minutes = 2.55 x 60 = 153 mins)
3 x 0.75 = 2.25hrs (converted to minutes = 2.25 x 60 = 135 mins)

If you need more run time do the estimate for the larger units

Estimated Run Time Jackery 300 = 293/80 = 3.66hrs
75% = 3.66hrs/220 mins
85% = 3.11hrs/187 mins

Estimated Run Time Jackery 500 = 518/80 = 6.48 hrs
75% = 4.85hrs/291 mins
85% = 5.5hrs/330 mins