Solar powered checkbook calculator1/31/2024 ![]() ![]() I assumed offsetting the load but remaining on the grid to use as a virtual battery. You are assuming his cutting the umbilical chord to the grid. Have fun.Dereck ( spelled it right for change) Oh yeah that means for th efirst 10 years you will pay around $1.65/Kwh up front in cash vs 12-cent to the electric company. Inverter, judging from your huge daily load leads me to believe you have air conditioning right? So you will need a good industrial 10 Kva inverter cost around $15,000Īdd another $10,000 or so for materials, plus another $6000 or so for a 10 KVA generator and 400 Amp battery charger. With a panel wattage of 23,000 watts and using 48 volt batteries will require 6- 80 amp charge controllers $500 per unit cost total around $3000. Batteries need replaced about every 5 to 7 years at higher cost.Ĭharge controllers get tricky at these monster sized power levels and demand MPPT charge controllers. Space requirement plus spill containment the size of a 2-car garage so you can plan to add a room onto your house at additional expense. Solar panel wattage = / 3.1 Sun Hours = 23,178 watts, but you can cut back to an even 23,000 watts. ![]() Last warning it will be fun and very educational, so hold on to your checkbook and let's get started having fun Now let's have some fun with math and see what it takes for you to generate 47.9 Kwh per day. You have to use worse case which is December and January insolation of 3.1 Hours. That will cause you to sit in the dark all winter wondering WTF did I get into and destroyed $10,000 worth of batteries. For starters you used yearly average solar insolation for a battery system. This would mean about 32 modules of that wattageĪt that size with a string inverter you should be able to do better price wise unless you are using sunpower modules as they are a bit pricey. To produce that would take about 10KW of modules based on an 80% harvest Understood that #5 is offset by rebates and the like, not part of this calculation at this point.ġ462 KWH average per month = about 49 KWH per dayĤ9/5.07=8.59 KWH per hour average for 5 hours Module Rating (nominal): 315W (not much roof area, need high producing panels)ġ) Required daily watt hours: 48733 (1462kWh * 1000 / 30)Ģ) Required hourly watt hours given available sun: 9612 (48733 / 5.07)ģ) Total watts / hour produced by panel adj. To that end I'd like a sanity check on the numbers and assumptions below to know that I am moving in the right direction, thanks in advance for the help! I apologize upfront for any incorrect terminology. Suggest-A-Calc: We are always looking for innovative, high-quality products.I've been migrating off the grid slowly for the past 4-5 years and solar is the last big step to meet that goal. ![]() ![]() Optional leather bi-fold and tri-fold covers available.Ģ025 Batteries - Backup for most Victor Printing Calculators and Other Calculator ProductsĬontact Us: Have a question, suggestion, or concern? Visit our Help Center for assistance!
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