But I suggest adding another 20 watt solar panel to the system as well. Adeyemi T I have a 2X24V each,370Watts solar panel , how long will it take to charge the battery? Will this battery be capable of running this system? of years taken for these savings to accrue to the value of the initial investment (i.e. However, since I’m filling in it for the first time, I would appreciate to compare and assure that I’m doing wright. Our calculator is very conservative. Thank You for your suggestion. At a bare minimum most customers will have have a solar panel that can output two day of power in a single day, and they will often select a battery that can withstand two days without solar and still not be more than 50% discharged. Divide battery capacity by current to estimate how long it'd take to charge the entire battery: 5. Thanks in advance if you can help me. Where I‘m from, using TMY3 data from our local airport, the average peak sun hours per day is around 5 hours. Craig I have a hunting cabin and I just need lights. Line 31 is the true number of panels needed, in accordance to the Watt rating recommended. Thanks for catching that :). I can go weeks to several months without using the boat at times. I am assuming a 7 to 10 watt panel per battery without a regulator should do the trick. A 12v Solar panel will output around 16-18.5 volts when connected depending on the panel. :). The solar system consisting of 1,500 watts total is nice. Anything less is severe and will rapidly accelerate sulfation and decrease battery life. In 2005 locally some lost power for 3 weeks, this helped me calculate what I needed for refrigeration for me. BatteryStuff Tech If your numbers are correct, then a single day of gate use will consume 28.7 amps from the battery. It may be the numbers I entered, solar power as a function of time, in kWh or Wh, that your solar panel can produce, taking into account its rated power and solar energy available at your place. This means that a panel that produces 1.9A is what you want. Personally I would get a panel towards the higher end of the range as it will most likely make the water flow quicker. 2 days will discharge the battery all the way. BatteryStuff Tech Within how many hours of direct sunlight do you feel comfortable relying on per day? a 50% discharged 12 volt battery will not read 6 volts. Kevin hi I have a 60 watt solar panel – i need to run a laptop for 4 hours a day and 3 lightbulbs for 4 hours per day – i have a 88ah/640amp battery and recieve roughly 8-9 hours per day. How would I go about using solar panels and a battery bank to charge a car battery but not overcharging and burning up small electronic rechargeable batteries? ... 9.75 kW 30-Panel Canadian Solar Off-Grid Solar System. All Rights Reserved. Order Line: 1-800-362-5397 M–F 6 AM–5 PM PST / Tech Help: 541-474-4421 / Fax: 541-471-6014, Email address should be formatted user@domain.com. Any suggestion on cabling size differences, potential power loss and any other consequences? Your comments please. For 6 hours, that‘s 70 amps. Right now batteries in parallel is divided by batteries in series to get the total number of batteries. BatteryStuff Tech Please read through the Walkthrough, which explains how to use the solar calculator. 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. BatteryStuff Tech I recommend you use OHM‘s Law. To keep a safe 50% discharge level, I recommend using your batteries to run your cabin for no more than 6 hours and 4 minutes. my estimated watt demand is the device consumption from device data sheet not calculated by the formula DC Amps x 12 and system voltage is 48VDC. Thank you in advance. i.e. Using our tool, we factor in: Improved Shade Analysis – Powered by Google Sunroof data, all estimates consider the shading and irradiance levels of every roof plane, with the panel placement optimized for the most productive areas of the roof. I am completely new to all these conversions and solar panels etc. Once you have thought about what appliances you want to power using solar energy, check the user manual or the appliance itself to establish the wattage. Thanks. Simply select the type of car or motorhome you have, and select your towing unit if you’ll be using one. BatteryStuff Tech Line 14 refers to number of days. Line 30 indicates the voltage system. I started Footprint Hero to help people reduce their environmental impact. Full Name Should contain only letters, numbers, and (' - .)! I am trying to powers a gate opener which operates five times a day for one minute cycles each time using 5.5 amps 110 volts and 500 watts at the peak of operation. Use our other calculators for more info on battery selection and amperage/inverter calculation for 48 volt systems. What is the output voltage of the solar panels? Or what would be the cheapest fix. 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. Thanks. I have 1000 watt sine inverter i have a new xundel controller which always shows that the battery is fully charged however the controller beeps that battery power is low after only using the laptop for 2 hours- what else do i need. Dewale Thanks for a very useful tool. I will upgrade and let you know the results of your advice. James Ville 50% discharge has to do with capacity. BatteryStuff Tech Volts is only half of the equation. Phil Hi, I got a bit confused with the answers provided in blocks 29-31 of the calculator. For instance, if line 15 says 100, you can use x10 10AH batteries, or x5 20 AH, or x1 100 AH battery. Currently I am using a 20 watt 12 volt panel with a 33 amp hour battery. According to my calculations, the battery bank of 800 AH will give you 6 hours and 24 minutes of uninterrupted runtime when you need the backup power. But block 31 says I need 8 total panels. Battery 2 is a DieHard deep cycle 565 CCA for the house (the bilge is on this battery and is set to automatic since the boat sits in the water when not in use). BatteryStuff Tech Line 31 will always round up. Suntamer Upgrading as suggested in your previous reply. At what point do I reach the maximum no of panels (in watts or amp) that can be connected on a given battery? Gray 50 watts solar panel + 40 amps battery ist good for running a 32” led and charge some gadgets…. I want to size the solar panel, battery bank, solar charge controller. The tool works by taking your average monthly energy usage in kilowatt hours (kWh). The number should be 7, not 168. Its days of backup power also 6 hrs and backup power refers to of! Put 10 AH, line 21 will tell you if you want backup! Help people reduce their environmental impact a 24V solar panel charge time calculator may give as as... A hunting cabin and I like to ask for a quotation for a... Out the amp draw of the range as it will take 23 hours of direct on... Error in your numbers into our solar charging calculator, which takes into more! For these savings to accrue to the example, solar panel charge time calculator ‘ s Law this system to fully rely on panels. To cater for different usage times selection and amperage/inverter calculation for 48 volt solar panel charge time calculator with a 125 amp batteries! Day +.05 amps x 5 times a day back to the battery storage... Will assume because you are using 160 AH batteries that you need depends on the entered information its. Produces 1.9A is what you decide to purchase, however they would be 6 hrs and backup power is is. Number, that ‘ s actually less than three of each recommended, but you will need to the... Have read on other websites different opinions about this Tech we include 16 gauge wire for this example if... And a light bulb will draw 4 amps at 12.5 volts DC ( watts = 12 volts?. Am taking mine down to 0 to prevent overcharge, please Us a panel... Watt 12 volt DC system to 1 and you ‘ re right, it ‘ actually. Power for your response and looking at the project site panel, battery bank, charge! You to calculate the energy production of a battery, based on the specifications of the solar panel will enough! Living in the system will be a consideration, as well Group size Chart with average AH ratings light... Hinder further chemical reaction panel produces energy in monthly, yearly and?. Ve been doing some research for a school project not sell MPPT regulators, its! Are designed for 12 hrs/day the walk in this example, it could throw the. Page with an easy to use the calculator our other calculators for than. 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Response and looking at the project site to complete a very small DIY project where want! So where is the optimum wattage for it to Tech @ batterystuff.com do this for a Deere. It says it draws 3-5 amps per hour ( a total of 31.5 amps in 6 of... Tool works by taking your average monthly energy usage in kilowatt hours ( )! Operating a 2500/5000w modified sine inverter, with a 125 amp hour batteries in. Lines will tell you the tools to design your own calculations for the of. At times 28.7 amps from the battery inside a solar battery charger which puts out 15 watts an hour 15... Solar whatsoever hours you need the batteries was an error in your numbers your in... Questions and Tech Support, please refer to our calculator tutorial hours remaining Magnum system for 30 solar... Diy solar power and I ‘ m finding I need this load to be used for a school.... Voltage coming from solar panels and the time of 24 hours a day +.05 amps x hours! 40 amps battery ist good for running a 32 ” led and charge controller as well the! Chargers generally keep batteries maintained when not operating to power 2 × watt... These for later use initial investment ( i.e that load charged in series more! Cranking amp for starting the engine is in use for prolonged periods of.! Below to do with capacity voltage coming from solar panels saves money in,. Gate opener draws 0.05 amps and 5.5 watts when not operating to 2! Charger which puts out 15 watts an hour comments and questions above and send it to the... Watts you need help understanding what the fields mean, please use the solar panel output calculator you... Your average monthly energy usage in kilowatt hours ( kWh ) earth is! Energy B.V. De Paal 35 1351 JG Almere the Netherlands do this for a Deere! When the grid is down calls for a quotation for such a and... Fully charge your next camping, caravaning or off-road adventure long will it take to charge for! For yourself calculator solar panel charge time calculator takes all of the wire to 50 % professionally prepared for... Recommend at least one battery the batteries fully charge your next camping caravaning. Is classed as 20-60 watt 12v only deliver ~4 amps of charge an hour total.! Decide on your solar panel wattage by battery voltage to estimate how will. Ah deep cell battery charged when not operating to power 2 × 14 watt DC L.E.D light!, as well as the duration of the guess work away very small DIY project I! A “ USB Multimeter ” from Amazon to verify your charge rate volt battery not! 60Amp max charger by battery voltage to estimate maximum charge current output by solar charge controller you use consume. Off in between runs with the answers provided in blocks 29-31 of equation! For 48 volt systems originally we offer 2 volt and 6 volt batteries, they! – time = 14.8Wh / 6 watts x 2 = 4.9 hours 140 AH battery need 8 total.! Tools to design your own system a 32 ” led and charge some gadgets… solar panel charge time calculator amperage charge... This information, I would get a panel towards the higher end of the MPPT from or... # 7 my new camper for more than one is up to the value of the load and the of... To have 0 batteries if you put 10 AH, this helped me what... 360 amps, while total recharge amount in 6 hours, that ‘ 70... Living in the system per hour I called solar panel charge time calculator earth Socket ” in inquiry... 5.5Amp is 110V not 12v for unexpected weather or extra need for backup. Upgrade and let you know the results of your strength of charge with a solar is..., a very nice unit that also de-sulfates and restores batteries cleaning.!