calculating your power usage for each electronic device, Here are some tips to cut back on electronic use, Best 12v Inverter For A Camper Van Conversion, Battle Born Lithium Batteries Review LiFePO4, How To Install A Battery Isolator In Your Conversion Van, Installing A Battery Monitor In A Camper Van Conversion, https://www.parkedinparadise.com/cassette-toilet/, https://www.parkedinparadise.com/portable-propane-water-heater/, https://www.parkedinparadise.com/best-roof-vent/, http://www.smartgauge.co.uk/batt_con.html, https://unboundsolar.com/solar-information/sun-hours-us-map, Optimizing Your Camper Van Electric System, How To Calculate Wh For Each Electronic Device, over two years living in a DIY camper van, Select whether it is an AC or DC powered (AC uses an inverter), Choose which battery type you want to use, Enter your estimated sun hours (direct sunlight you expect on the panels), Aim to use as many 12v DC powered electrics as possible, Cook efficiently – fuels like propane and butane will make your system smaller than cooking with electricity. Hey Andy, for winter camping, adjust the list of devices and number of sun hours. All I’ve been able to find are rings, spades or slabs. Solar Power Estimate Calculator (SPEC) for caravans and other RVs. AGM batteries wear out quickly if you use more than 50% of their charge, so they require a larger battery bank to compensate. Hey! If you want more information on electricity, head over to our electrical home page. One great way to extend battery life is to install a Samlex Solar power kit on your RV.  Battery monitor (optional) Parked in Paradise caters to van life, camping, and RV enthusiasts. so I use it for 10 minutes, thats 0.6 of an hour so 720/0.6 = wH of use? This is relative to how much total capacity the battery has, so larger batteries can discharge more quickly (hence a larger inverter). Certain circumstances benefit from wiring in parallel, but our default is to wire in series. The size of your system is directly related to cost. So when that compressor is off, it’s not using electricity even though the fridge is plugged in. 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? Working voltages normally are 18V, 36V and so on. 12 volt electricity in general is relatively safe, but there are a lot of things that you can miss if it’s your first time. With that said, for smaller 12V systems, it is often advisable to get a PWM controller and more solar panels get more bang for your buck. So it gets a little overwhelming, but it’s not too bad. But smaller inverters are more efficient.  Solar panel roof mounting z-rack (optional) Great site! 200Ah (x2) Battery (AGM option) B2B charger (compatible with lithium). If using heaters and fans, it is helpful to do a calculation for a winter month and a summer month (including sun hours below) and use the larger of the two. Enter the distance in feet from your Solar Panels to your Battery Bank / Charge Controller. Sadly I’ll be ditching my $800 worth of 200 AH AGM batteries for lithium. Now, this inverter number is only going to pop up if you have AC numbers selected. Hello!  Electrical wire crimp connector I can get the amps I want using 1, 2, 3, or more batteries. But you suggest in series I’ll then have 36v (12+12+12v) and still 300 watts out? A cheaper option is to go with a battery isolator. Solar.com has substantially upgraded its solar savings calculator to provide more accurate cost and savings estimates with solar. This is my first solar project.  Rigid Monocrystalline So in this case, to discharge 1127 watt hours per day, we need a 470 amp hour battery if we only want to discharge it 20%. this is awesome and very helpful. As an Amazon associate we earn from qualifying purchases. The calculator you used earlier will also tell you the ideal amount of panels in terms of watts as well as the right sized solar charge controller. I know they can be discharged more than their AGM counterparts, but that still seems rather low. Oh that vent fan is on maybe 4 hours of the day, at night to cool the van off. Thanks! I have the same solar charge controller shown in your diagram, but I can’t find the specs for it. do you have any information for using three inputs? Using your calculator, rounding up with worst case, I will need a 12v 200 ah battery and 300 watts of panels. It is a DC powered fridge, so that means it’s plugging right into the DC electrical system. The calculator takes into account the power consumption you use in your caravan/RV and your travel destinations. So once you have your battery, your power storage, you know your power storage can discharge a full day’s use, you can always boost that if you want. So an FLA battery can last 8 or 10 years, if you discharge it past 50% every day you’re only going to get about 2 or 3 years out of it. We also have two phones, and our phones are I think 3 amps but at 5 volt USB so they’re each running about 15 watts and they’re plugged in 3 hours per day. to working out what size solar panel you'll need for your campervan, caravan or motorhome. But with a 20% discharge you need a lot bigger battery if you’re only going to be discharging it the same amount. If you have an angled system, so you can tilt mount your panels towards the sun, you can boost that up to 5 hours. If you have sleep apnea and you have a breather that you need on you, you can boost your battery size to make sure that you have juice to run a few days without recharging. 100Ah (x1) Battery (Lithium option). What we’re trying to figure out is our daily electrical usage, or our max average.  100Ah 12v (x4+) Lithium Battery. You have saved me alot of effort ? 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