I just bought an energizer(84020 12V All-In-One Jump-Start System with Built-In Air Compressor and Power Inverter) as I am in sales and constantly on the road. I wanted to charge the battery with solar since I am in solar sales and I like to walk the walk. Its a 12v 18AH SLA but is expecting AC as the charge. I was wondering how many watt panel might supply an adequate recharge if I strap it to the roof of my FJ as I have latops phones and other sales tools plugged in to the unit. I ma guessing Ill need a small inverter and charge controller as well. Thanks in advance!]]>

If I need 8amps (2500watts)per hour under full load (1 to 2 hrs daily) for cooking and about 1-2amps for lighting and radio 24/7.

I will be operating a 2500/5000w modified sine inverter, with a 140AH battery. Will this battery be capable of running this system? I was also looking at a 40watt solar panel through a 30amp regulator for recharging and a 2kva gen-set for use during the cloudy days, or will I need a larger AH battery and larger panel?

There is an average of 10 hours daylight (tropical climate),

If the calculation is correct, I will need 4 × 40watt panels.

It may be the numbers I entered,

line # and figures

3 = 100 (8amps x 12 rounded up)

6 = 7 (60 / 8 average)

12 = 12v system

14 = 1 backup (gen-set)

18 = 1 × 140AH battery

22 = 10 daylight (conservative 9closer to 12)

25 = 40 watt panel

told me I needed 4 × 40watt panels in line 31.

cheers for any advise,

]]>19 Actual # batteries wired in parallel Raw number number (gives 2.13 for my specifications)

20 Batteries wired in series Relates to system voltage number (gives 4.00 for my specifications)

21 Rounded number of Batteries Always rounded up number (gives 1 for my specifications)

I am completely new to all these conversions and solar panels etc. I am trying to complete a very small diy project where I want to run a small aquarium air pump for 18hours a day. The pump is rated at 3.5w 240v ac. Are my calculations right in that this could be done with a small 30w panel. Bearing in mind I need to use an inverter as I can‘t source an adequate 12v dc pump . ]]>

Thanks in advance for clarifying the situation!

My background: I\‘m doing an undergraduate project where I\‘m building a PV powered Vapor Compression Refrigeration system. I\‘ve estimated that the power consumption is about 300 watts per day, or 12.5 per hour 24 hours a day. It will be running on a 12V system, and its days of backup should be between 1-3 days. I\‘m also limiting the system to 1 battery only. Where I\‘m from, using TMY3 data from our local airport, the average peak sun hours per day is around 5 hours. With this, I\‘m finding I need a panel of 130 watts.

Note: I\‘m only using this calculator as a reference for sizing the system so that I have a ball park of what to expect as I\‘m going along in the design and building process.

]]>I have 4X160AH battery with a 48V 5KVA inverter,l would like to know how many solar panels i need to get and the charge controller? ]]>

Willie. Montagu, South Africa.]]>

is available for 9 hour. is 5 am battery is suitable for 40 watt solar panel ]]>

my quesition is

I can get calculation about Solar Panel and Battery bank but I can not see any Information about charge controller to find the exact value? so how to calculate the amperage of charge controller that to be used in the system to charge the battery?

thanks

]]>What is the limit of total solar watts that can be connected to a given ah battery? I have a 800 watts, 12V, 200AH inverter system. I have a 500 watts AC load to be powered daily for at least 8 hours. The calculation showed I need 15 nos of 120 watts panel in parallel connection to charge the 200ah battery. At what point do I reach the maximum no of panels (in watts or amp) that can be connected on a given battery?]]>

Zaks

]]>We would require more information about your situation. Please contact one of our techs at tech@batterystuff.com.

]]>I hope you will be able to respond to my email if you do not think my inquiry fits to the comments in here.

Thank you very much in advance! and I’d like to ask for a quotation for such a solution.

Kindly, Frawsen

We would require more information about your situation. Please contact one of our techs at tech@batterystuff.com.

]]>Thanks for this calculation tool! It is fantastic!

However, since I’m filling in it for the first time, I would appreciate to compare and assure that I’m doing wright. So please give the end answer (i.e. number of batteries as well as solar panels) if the need is an earth closet with an electrical rotor (25 W-AC with 230 VAC that goes ca 1.5 minutes after each use. Assume 3 uses/day) and an electrical heating motor (of either 255 or 80 W-AC with 230 VAC depending on the temp. The ambient temp shall be 80 degrees Celsius. The use of the earth closet is only summer time – i.e. May to September in southern Sweden, Scandinavia). There is a fan as well, which consumes 25 W-AC and a light bulb with 5 Watts. I guess these two go on when the earth closet is in use.

Due to the fact that we don’t have all the information for your system we would need you to contact us at tech@batterystuff.com so that we can ask the appropriate questions, to get you the answer that you may need.

]]>

We would require more information about your situation. Please contact one of our techs at tech@batterystuff.com.

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