Hi guys, just installed an hybrid solar system 2 weeks ago and trying to figure out the return on investment, lifespan, depth of discharge etc.
We live on a small tropical island that is run by diesel generators and we experience 4 to 5 power interruptions (1h to 4h) per week. So the battery is a needed backup. I drain it in baby steps currently every night to make sure it has enough charge left to get us through a grid power interruption during the night.
Meritsun LiFePO4 Battery 200Ah (10KWH)
Price: 200,000 Pesos
KWH Price: 11.23 Pesos
Operating Temperature: 30 to 35 Celsius (86F to 95F)
Humidity: 60 to 80%
Cycles: 6,000 (Manufacturer)
Warranty: 10 Years
Drain it daily to: 75% (SOC 25%) or use 7.5 KWH for easy calculation.
7.5 KWH x 11.23 Pesos = 84.225 Pesos
200,000 Pesos / 84.225 Pesos = 2375 Battery Cycles
2375 Battery Cycles / 30 days = 79 Months
79 Months / 12 Months = 6.58 Years
My conclusion: The battery paid for itself in 6 and a half years when drained down to 75% every day and it will have 3.625 Cycles left and 3.5 Years in warranty.
My big question is: Should I go easy on with cycling the battery and use it purely as a backup, or does it make more sense to use it heavily to get a quick ROI?
What are your thoughts and opinions?
Thanks
Solana
We live on a small tropical island that is run by diesel generators and we experience 4 to 5 power interruptions (1h to 4h) per week. So the battery is a needed backup. I drain it in baby steps currently every night to make sure it has enough charge left to get us through a grid power interruption during the night.
Meritsun LiFePO4 Battery 200Ah (10KWH)
Price: 200,000 Pesos
KWH Price: 11.23 Pesos
Operating Temperature: 30 to 35 Celsius (86F to 95F)
Humidity: 60 to 80%
Cycles: 6,000 (Manufacturer)
Warranty: 10 Years
Drain it daily to: 75% (SOC 25%) or use 7.5 KWH for easy calculation.
7.5 KWH x 11.23 Pesos = 84.225 Pesos
200,000 Pesos / 84.225 Pesos = 2375 Battery Cycles
2375 Battery Cycles / 30 days = 79 Months
79 Months / 12 Months = 6.58 Years
My conclusion: The battery paid for itself in 6 and a half years when drained down to 75% every day and it will have 3.625 Cycles left and 3.5 Years in warranty.
My big question is: Should I go easy on with cycling the battery and use it purely as a backup, or does it make more sense to use it heavily to get a quick ROI?
What are your thoughts and opinions?
Thanks
Solana