Following. I was looking at power walls to be charged by my 16kwh Generac so it doesn't need to run constantly in an outage like the one we just had.
What will you be able to run off that battery and for how long?
It's amazing what you can do with 18650 cells. If you make a 24v for the boat, what are the advantages of building one over buying a pre-made lithium deep cycle? Cheaper?
My solar array generates 50kWh daily on average. So during the day, this battery wouldnt drain at all. I could run my whole house off it theoretically during the day. At night, i would limit it to my critical loads, IE: Fridge, freezer, hall lights, and some outlets. Those would run for roughly 15-20hrs off the battery, which should easily get me through the night. Winters would be tougher, but the best part about this is its all modular and scalable. Need more power? Add more batteries.PRICE PRICE PRICE! For enough cells, you are looking at about 340$ shipped to build 1x 16.8v 4s battery and 1x 12.6v 3s battery for a total of 29.4v. You could do 2x 16.8v batteries, just make sure your trolling motor can handle 33.6v. Then pick up 2 60amp BMS's for about 15$ ea, some shrink wrap, and a case to put it in, wires to handle 60amps, and you can probably build both for under 500$ total. Best part is, you can charge it with any 30-35v charger, as the BMS will balance the cells and cut off the voltage.Conversely, if u were to just buy a 12v 105+ah battery, you are looking at 800-1000$ each. So figure 1500-2000$.4X The price and not nearly as fun lolPowerwalls are so stupidly over priced. You are looking at close to 12-15k installed.
Yes they are money. Don't look at the price for that generac installed! They don't give them away at that size but I can run everything! That said it worked its arse off for 7 days after that tropical storm and I realized I need storage....probably solar at some point as well.
I got my solar a couple years ago right before all the rebates and srec programs ended. My array cost $30k, but i only ended up paying $12k after the rebates. The remaining 12k was put on Massachusetts solar loan at 1.4% for 10 years. Every Megawatt of power I generate equates to 1 SREC which sells back to the Ele company for 250-300$. I generate 10 megawatts a year for 2500-3000 in SREC income. My loan is 200$ a mo. Do the math lol.. My SRECs pay my loan and i make another 300-500, plus no electric bill (200-250/mo). It sounded to good to be true and i was waiting for the "oh by the way" that made it all not worth it. But it never came. Ive been trying to talk people into solar since. But that 20-30k loan looks scary to alot of people.
You say "array", I assume you did not put this on the roof of your house? Stand alone array? And what is the life expectancy of the panels? I mean if you pay off the loan in 10 years, do the panels last another 10? Doesn't seem like a down side to this at all.
It would delay my next boat purchase but I have the cash for that and I am highly interested in discussing this more with you.