How many watts solar do I need to charge a 12 V 200 Ah battery?
How many watts solar do I need to charge a 12 V 200 Ah battery?Well, in how much time do you wish to charge it?I’ll state the formula here so that you can work it out with any capacity batteryAssumptionsBattery would be fully discharged or only 10% capacity would be remaining in battery. Battery voltages represent the State of Charge or SOC. For proper understanding please see the following image (Courtesy of Aussie Batteries & Solar|Australian Direct 12 Volt Shop for Camping, Caravan and Batteries Direct )2. You have at least 6 hours of peak sunlight available.MAIN WORKINGFirst we want to see how much power do we require to charge the battery. 12V200Ah can also be written as 12V*200Ah = 2400WHr or 2.4KWHr. Since we assumed that battery is at 10% level it means that we have to charge 2400WHr * 90% = 2160WHrThe energy we need from Solar Panels is 2.16KWHr.Now we have also assumed that there are 6 peak sunlight hours. So in order to charge these batteries in 6 hours we should have 2160WHr/6Hr = 360W Solar Panels.But there must be some losses right ?There are irradiance, temperature, conversion and (but not limited to) battery losses.I usually keep these losses at 20-30%.We would want to compensate these losses so that after all losses we still get the required power to charge 12V200Ah (10% capacity remaining) in 6 hours.So the end formula becomes[math]Solar Panels Total Power = ((Battery Voltage)*(Battery Ah)*(1-State of Charge)/(Charge Duration in hours))*(1+Losses)[/math]In our case it becomes[math]Solar Panels Total Power = ((12V)*(200Ah)*(1-10%)/(6H))*(1+25%)[/math][math]Solar Panels Total Power = 450W [/math]Now the complete sentence450W Solar Modules would charge a 12V200Ah (Fully Drained) Battery in 6 sunlight hours
How many solar panels do I need to charge a 150AH battery in 5 hours?
Figure out the discharge capacity of your 150Ah battery. If can be anywhere from 50% to 80%. I will assume 80%. That means you will have to charge only 80% of the rated capacity and the battery cannot be discharged below that capacity.150Ah *80% = 120AhEnergy generated by the battery = 12V*120Ah = 1440WhAssuming an average for number of hours sunlight is available in a day = 4.5 (this will vary based on where you live)Ideal Panel Size = 1440 Wh/ 4.5h = 320 W.Adding the the losses of the converter that will be used to charge the battery (around 90%), actual solar panel size = 320/90% = 355 WattsYou will need a solar panel of 350 Watts to ensure your battery is charged full.
How much watt i need in a solar panel to charge a car battery?
A single battery won't last you very long. You'll want a bank of many batteries connected in parallel. Also, you'll want to use deep-cycle batteries that can be drawn down and recharged. Car batteries are not designed for this type of use and will not last long. You will want to calculate your average energy consumption. You can use your utility bill to see how many KWh of electricity you use and make sure you have some reserve. You will likely need a fairly substantial array of solar panels if you want to run the house independently of the power grid. For example, our small house uses about 200 kWh of electricity per month. That's an average draw of 280 watts. If we assume the solar panels produce about 80% of their rated output for about 6 hours per day, (accounting for times the sun is not directly aimed at the panels) that would require about 1500 watts of solar panels just to maintain the average draw. There's also some loss in the inverter. Your plan is a noble one but you are looking at some substantial expense and effort.
How many solar panels of 200 Watt, 200 Ah battery charge controller & inverter should I use with a 500 watt refrigerator of 60 Hz for 12 hours?
Hi,Will presuppose: 14.4V charging voltage, 6 hours full sunlight per day and permanent sun-follow panel, 70% efficiency inverter, 80% solar charging efficiency, 50% max discharged battery level, ideal battery.First, the refrigerator will take 714.3Wh so your battery will hold to 12V about 1 hour and ~30 min without charging.Second, will take 230Wh to correctly charge a standard 200Ah lead battery from 50% to 99% and you’ll need for 6 hours and 15 min.Per hour, with 80% efficiency will be 1180Wh, with approximation, your answer is6x200W solar panels, but your refrigerator will work only 7.5 hours.10x200W solar panels, 4x200Ah 12V battery and your refrigerator will work 12 hour for sure.Check Breaking the rules. Solar Charging. Examples for more example like this. Thanks.
How many solar panels do I need to charge a 200 Ah battery in 5 hours?
What no one has really touched on is that with 200Ah of wet cell battery capacity, you really only want to be using 100Ah at most.This is because batteries are damaged at low levels of charge (yes, even “deep cycle” batteries”). Batteries which regularly cycle to less than 50% of capacity will quickly degrade.In the real world, most retail solar panel kits output around 75% of their advertised capacity (i.e. a 120W panel will actually output a max of 90W).Assuming the user actually used 100Ah per day (that’s quite a lot assuming this is for camping use) then they would need 20 amps of current to charge the batteries in 5 hours.For a 12V charging setup there is about 20% of losses (solar controller etc.) so you’d actually be looking at 25 Amps at about 145 volts, or about 350W.Taking into account the panels only give about 75% of advertised, that would need 450W of solar panels (approximately).I think the question as asked is flawed. It is based on the rated battery capacity, rather than the user’s actual daily power needs.The user should take stock of all the powered items they will need - e.g. fridge, lighting, etc. and work out this over a day.E.g. if the fridge needs 2 Amps on average, thats 48Ah per day. LED lighting may use 1 Amp for around 5 hours per night, so that’s 53Ah. Other bits and pieces might take this up to 60Ah.In that case, the solar needs would be more like 270W to fully recharge the batteries each day (assuming only 5 hours of sunlight).
How many solar panels do I need to charge a 100Ah battery in 5 hours?
A 12 volt 100 AH battery needs 1200 watts of energy to be charged a 100%. However, its unlikely the battery is at 0% to start with. But for this reply I will assume we need to charge from 0% to 100%.Now a 280 watt panels used for solar rooftop systems will produce close to 280 watts in an hour(in bright sunlight). There's a loss of power because you are likely to have a charge controller between the Solar Panel and your battery. An average power loss is 10%. So you would get about 250 watts of power an hour.So you need 1200 / 250 = 4.8 hours of bright sunlight.A single solar panel of 280 watts will do the work for you. There are other solar panels with various power ratings you can install to charge your batteries such as 100 watts, 150 watts, 235 watts, 250 watts and many more. You just need to calculate the number of solar panels by dividing 1200 watts with power rating of the panels.
How many solar panels do I need to charge a 200 Ah battery in 1 hour?
You would need to provide the voltage. Also, do you mean you want to charge the battery to its fullest capacity in just one hour?Assuming your battery is 12 V:12 V * 200 Ah = 2,400 WhFor each panel that you will be using, assume that you will only get 80% of the peak power output. Let’s say you will be using 100-W panels, this means you’ll only get 80 W per panel.Taking these into consideration:2,400 Wh / 80 W = 30 panelsIf you’ll use 200-W panels, then you’ll need 15 panels. And so on…Check this guide if you need help in computing the number of panels you need.
Can a 200 watt solar panel fully charge a 200ah/12v battery?
In full sun condition 200 Wp panel will take 12 hours to completely charge the 200ah/12v Battery. So if you have to use battery backup on daily basis then it is not advisable to connect 200Ah battery to it. As a thumb rule you can take 40% of your panel capacity to work out the optimum battery Ah value to be connected, based on this 80 Ah battery Back will be good to connect with 200 Wp Solar Panels.Hope it helps!
How many hours will an 80-watt solar panel charge a 45AH battery?
The answer is impossible to know without having another piece of information about the battery, but I’ll assume your 45 amp-hour (AH) battery runs at about 12 volts (V), as that is the most common voltage for a battery of this size.A 45 AH, 12 V battery has a capacity of about 540 Watt-hours (Wh). A 540 Wh battery being constantly charged at a power of 80 watts (W) will take 6.75 hours (just 540 Wh / 80 W). This is of course assuming that the 80 W solar panel is receiving continuous and direct sunlight the entire time, as a cloudy day or shade covering the panel will decrease its effectiveness and increase the length of time required. But it seems safe to say the battery could be charged in a single average day of charging with an 80 W solar panel.