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panoptil

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Posts: 3
Reply with quote  #1 
I am planning to build a floating bar and would like to go solar for my basic energy usage.
Here is my electric needs :
- commercial blender
- ice crusher
- Led lights (8 total)
- home sound system with 4 small speakers

The sound system will be used all day and night
The lights only 6 hours a day and all Small LED
The blender and ice crusher will be used on demand, I would say à total of 20 minutes per hour

What would be the installation needed?

stmbtwle

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Posts: 2,823
Reply with quote  #2 
Hi Panoptil, welcome to the forum!

If this is a commercial enterprise, before I did anything else I'd check with authorities and make sure it's LEGAL!  It would be quite annoying to spend all that money and then get shut down and possibly fined.

You'll need to check the wattage on all that equipment (usually stamped on the bottom/back), estimate it's usage (hours/day), and come up with a total watt-hrs per day and maximum wattage at any given time, before anyone can determine the needed battery, inverter, and solar capacity.  A spreadsheet would be nice.

As the solar energy available varies by location and time of year we'll also need your rough location.

Then we can probably help.  

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
panoptil

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Posts: 3
Reply with quote  #3 
Ok thank you to lead me into what I need to do. I have no clue how everything work but I think I figured out the basic. I calculate everything to the maximum possible usage.

First my project is totally legal since I will operate in the Philippines and there is a few already open around already.

Sunny hours is 12 hours per day.
Bar will be open a maximum of 14 hours a day

Equipment use are as follow :
1) Mini sound system - 200 watts - 14 hours/day
2) Led lights (8) 15 watts per light - 120 watts - 7 hours/day
3) blender - 500 watts - 5 hours/day
4) ice crusher - 500 watts - 5 hours /day
5) 1 fan - 60 watts - 14 hours per day

Daily kw usage
1) 2.8 kw
2) 0.84 kw
3) 2.5 kw
4) 2.5 kw
5) 0.84 kw

Total of 9.48 kw/day

Philippines is all 220v

Hope I calculated good and I put all maximum usage... Probably will use only 75-80% of that every day....

Thanks guy
stmbtwle

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Posts: 2,823
Reply with quote  #4 
Better to estimate on the high side, anyway. I'll call it 10kwh/day

You'll need roughly 20kwh (rated) of batteries. They'll weigh around 600kg.

You will need at least a 1000w inverter, assuming the blender and ice crusher don't run at the same time. 1500w or 2000w would be better.

10kwh/day is about 300kwh/month. You will need 3kw (12 x 250w) of solar panels in your area to generate that in the summer, 4kw for year-round. http://pvwatts.nrel.gov/pvwatts.php

you'll need a charge controller that can handle the output from the panels.

If this bar is a boat that moves around, the panels will have to be mounted flat on the roof. If it is fixed in one position, you can orient them toward the sun and get a little more power (or a slightly smaller array).

I would invest in a portable power meter and determine how much your equipment ACTUALLY needs, you might get by with a smaller system.

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
panoptil

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Posts: 3
Reply with quote  #5 
Ok thanks for the informations.
I have another question, in my mind, solar panels was only to recharge battery. And I have access to electricity on the ground as well. If I go with battery powered only, how many batteries would I need to operate my 14 hours a day?
I can use less solar panels to recharge a battery once it's empty but having 2-3 batteries would probably make the trick. I can even send an empty battery and have it electricly charge.


stmbtwle

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Reply with quote  #6 
My estimate for battery power was for the total consumption at 50% DOD (depth of discharge). Whether this is 24hrs or 14hrs doesn't change the total appreciably.

If you are open mostly during daylight hours you could probably get by with fewer batteries, as the solar panels (if installed) will cover the load.  However as a "bar" my guess was that most of your hours will be after dark.

You haven't said whether this is simply a floating bar connected to the shore or a party boat with an engine.  The requirements are different.  If you have an engine you can use this to charge your batteries and carry the electrical load whenever it is running.  A generator is also an option.

If you already have access to electricity, why install the batteries OR the solar panels at all?   

 

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
stmbtwle

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Reply with quote  #7 
Panoptil, I think we need to recalculate your energy needs, I think your numbers are way too high.

Here in the US, an LED light that is listed as "60w" (equivalent) really only needs about 9w.  Confusing I know but it's done that way so the uneducated can "compare" with an old style filament bulb.  Can't speak for the Philippines but using the same rule, your "15w" LED bulbs may only use about 2 watts, eight of them only 16 watts.  The actual wattage is usually printed on the side of the bulb, but not on the box.  

Electric motors (blender/ice crusher) are much the same. While the STARTING load may be 600 watts, the RUNNING load much less, usually less than half depending on load.  

Same for your sound system.  It's wattage will vary depending on how loud you have it set.   

The only way to know for sure is to buy, beg, or borrow a power/energy meter such as this, and actually MEASURE how much your equipment uses (actually mix a drink for real-life conditions).  https://www.ebay.com/itm/220V-Multifunction-metering-socket-WATT-Power-Energy-Voltage-Meter-Monitor-/111411681764?hash=item19f0a759e4

I have a feeling that your power requirements are much less than the original estimate, and that your battery and solar requirements are much less too.  But the only way to know is to check.

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
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