petee_c
New Member
I came across this forum on my search for info on choosing/building a LiFePO4 battery for a kayak trolling motor build. The info here is awesome.
Then part of me was wondering about building a DIY Powerwall to use at home. I was trying to think of something to use it for, I wondered about moving my 75 gallon planted aquarium to an off grid scenario with charging from a solar setup
Between the lights, pumps and heaters for my aquarium, I estimate I would need about 2Kwh of energy per day. Which would mean I would need to use a 250Ah 12V battery or thereabouts to make it work.
As I was piecing stuff together on paper and in my head, I quickly came to the realization, that I would never see a ROI for this little project. At 2Kwh per day, my aquarium uses about $0.27/day of electricity from the grid. Say somewhere around $100/yr.
Price estimates in Cdn$$
280Ah LiFePO4 with shipping from China $550
400W solar panels , charger from China $500
BMS, inverter, cabling $250...
Total about $1300 if lucky, and I will need a way to augment the charging with grid power. I'm near Waterloo, ON, and I don't have very good southern exposure on my roof. 43.5N latitude
13 yrs before Return on Investment, and by then my battery probably has a 50/50 chance of being dead...
Then part of me was wondering about building a DIY Powerwall to use at home. I was trying to think of something to use it for, I wondered about moving my 75 gallon planted aquarium to an off grid scenario with charging from a solar setup
Between the lights, pumps and heaters for my aquarium, I estimate I would need about 2Kwh of energy per day. Which would mean I would need to use a 250Ah 12V battery or thereabouts to make it work.
As I was piecing stuff together on paper and in my head, I quickly came to the realization, that I would never see a ROI for this little project. At 2Kwh per day, my aquarium uses about $0.27/day of electricity from the grid. Say somewhere around $100/yr.
Price estimates in Cdn$$
280Ah LiFePO4 with shipping from China $550
400W solar panels , charger from China $500
BMS, inverter, cabling $250...
Total about $1300 if lucky, and I will need a way to augment the charging with grid power. I'm near Waterloo, ON, and I don't have very good southern exposure on my roof. 43.5N latitude
13 yrs before Return on Investment, and by then my battery probably has a 50/50 chance of being dead...