You might find that helpful. They are also quite a bit more expensive, but they last longer. A 12-volt battery can be charged from the alternator of a vehicle, a solar battery system, or through the electrical grid. Oh that vent fan is on maybe 4 hours of the day, at night to cool the van off. I purchased 10 gauge extension cables but the wire is so thick that it does not fit into the holes on the bottom of the charge controller. Is there any reason I cannot simply connect the solar to batteries outside the camper, and connect the Shoreline to the inverter?  ECO-WORTHY 800W Solar Kit, Batteries Thanks for the great article. the system can recharge the batteries the rest of the day. This calculator may come in handy when you buy solar panel (s) for your RV vehicle, boat, camper or home solar system, and you want to get a real estimate for the production capability of your solar panel (s). We can guarantee it for pretty much every situation. 100Ah (x1) Battery (Lithium option). From DC it’s 170 watts, accounting for the inefficiency it’s 187 watt hours because it’s running off an inverter. I have included a simple excel calculator to help you size up your system.  6 way fuse block + bus bar Here are some tips to cut back on electronic use. I recharge with a NOCO GENIUS that i hook up and plug in at work, which is an amenity they allow, a grace of God really. There are many differences between these batteries. Check out the FAQ for info on charging while driving and upgrading panels. Oops…. Awesome! The secon… This is just a general, you know that the size here is going to work.  Battery isolator (compatible with lithium) This field is for validation purposes and should be left unchanged. Is a 20 amp CC rated for input or output??? Change values in the boxes with arrows and the calculator will adjust to show you other system specifications: Inverter Input Inverter Power Rating Inverter Output 12VDC 24VDC 48VDC 120VAC 240VAC Max Voltage Drop %: Continuous Watts: Watts: Cable Gauge: Amps: Cable Length: Cable Length is the total positive and … This can also limit how much solar you can have on your motorhome or camper.  Renogy 100W Solar Kit (PWM charge controller) Not to mention fans and other incidentals, and losses throughout the system. For a 12V battery bank, this will be between 13.5V and 14.8V depending on where the batteries are at in the charge cycle. This would make your input at 18V and you would be getting more advantage of a PWM controller without loosing significant power. Advertisement. (IMO), I used your Calculator and was wondering on the Solar Panels could i use a 360 Panel instead of 3- 100 Watt panels? So in this case were using 1127 watt hours per day. My question is the AC charger for an electronic device has 0.50A input and 1.67A or 2.0A output, do I use the input or output number for solar sizing? Solar Power Estimate Calculator (SPEC) for caravans and other RVs. Your solar panels will have a selection down here for how many sun hours you think you’re going to use during the day. If you have things like toasters, if you have things like blenders, you’re going to see how quickly those things add up your electricity. Solar Panel Sizing Calculator Xls. Our fridge clicks on and off every 10 minutes or so, and then it will run for a few minutes and then it will click off. But if it’s just charging the battery and I’m surfing the internet – 120 [watts].  Rigid Monocrystalline What can I do to keep that fan running for at least 7 hours? For instance, can I buy 2 lithium batteries now and add more a few years down the road? No backup as there is no battery. I have included some sample numbers simply fill in the areas with green shading and let the orange ones do the calculation. If you are comparing two 12V DC circuits to each other, or two 120V AC circuits – the amp measurements (the current of electrons flowing th… 200Ah (x2) Battery (AGM option) How many batteries does your RV or trailer have? Either way works, it doesn’t really matter. Don’t underestimate cloudy days! But smaller inverters are more efficient. Now I’m thinking scrap the [free] group 27 deep cycle battery with ~80 amp-hours capacity and just going with 3 (maybe 4) 35 amp-hour AGM in parallel (again a space issue – fitting “short” batteries under the frame). I’m using 2- 100 Ah AGM battery’s that I’ve wired together in paralell w/ 2, 8 gauge cables. Hey Goizah, that depends a lot on the type of fan you’re using.  Electrical wire crimp connector We don’t save any of your information. Now, the PWM controllers are significantly cheaper. Type in your total Wh for “Watts” and 1 for “Hour” and the rest of the solar calculator will function as normal.  WindyNation 100W Solar Kit (PWM charge controller and battery included), Solar Panels But if you’re using your RV, you will need more. For batteries, my choice would be to scrap the old ones. And it’s our camper van solar system calculator. So you’ll notice your battery bank size changes significantly based on your depth of discharge. Now you can also select a lithium battery, and those can be significantly smaller because you can discharge those up to 90-95% without it harming any of the battery. Solar Battery Calculator.  Adjustable tilt mount (optional) In order to accurately size your solar charging system, we need to know what type of traveler you are. 2 years later I’ve learned a lot too! Write down the output wattage. This is nice to print off to show people. There are a few different ways to arrange panels, batteries, and connectors. I find that to be a little redundant. Yes, this component can benefit from upsizing if you’re not sure if you’ll need more solar or not. Thank you so much! Hi there parked in paradise visitors! Check out our article on charge controllers for more in-depth info. Click the image to select the type of RV you have. Your batteries do need to be able to be charged all the way as well so you can’t get too big of a battery bank or else you’ll start losing some of the charging efficiencies and your solar won’t be able to charge up those last few steps. Im in the planning pase as you may have guessed. Recommended Min Solar Watts The battery is essential for the system, not just to store energy but to create a balanced energy source (rather than the erratic energy that comes from the sun). Your email address will not be published. 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