Hello,
I have an offgrid property with a solar system. The system is about 8 years old and is due for a new battery bank. I am seeking any advice on what the most cost effective way to do this would be. The system comprises of 3kw of panels feeding into a Sunnyboy 3000HF inverter which is connected to a SunnyIsland 6.0H offgrid inverter. This is currently hooked up to 8 cells of 6V 330Ah sonnenschein sealed lead acid batteries connected in series. So it was originally 15.8kwh of capacity at 48V output.
I am looking for a cost effective way of replacing the battery bank and would ideally like to replace it with lithium ion however my main concern is whether or not the system is compatible with lithium batteries? And also how i would even go about configuring the Sunnyisland inverter to be setup with the new batteries.
I have spoken to a local offgrid electrician who was suggesting that sealed lead acid batteries still provide the best value for money and mentioned that lithium ion is not so great at handling the power surge demanded when appliances like the water pump kick in. Just curious if anyone can confirm this to be true.
I don't use a lot of electricity and only really need 3 or 4 kwh per day.
One option is just to replace the battery bank with the same cells as the original bank. So that would be 8 cells of 6v 330 sonnenschien. These sell for about $650 each here in Australia so about $5200 total for a 15.8kwh sealed lead acid battery bank. That is in AU$.
Another option is to buy 4 of these batteries:
12v 200ah Quantium lithium ion batteries. Connecting 4 of these in series should deliver an equivalent 48V output but I am unsure if there will be other issues that may arise due to compatibility issues. This would give around 10kwh of capacity for around $5000 which seems to be the more economical option whilst still providing more usable capacity and greater lifespan.
Anyway, just interested if anyone has any thoughts or ideas they want to share on this topic. And if I was to go with the second option, what else needs to be done to make it all work other than connecting the batteries?
Thanks for your time.
I have an offgrid property with a solar system. The system is about 8 years old and is due for a new battery bank. I am seeking any advice on what the most cost effective way to do this would be. The system comprises of 3kw of panels feeding into a Sunnyboy 3000HF inverter which is connected to a SunnyIsland 6.0H offgrid inverter. This is currently hooked up to 8 cells of 6V 330Ah sonnenschein sealed lead acid batteries connected in series. So it was originally 15.8kwh of capacity at 48V output.
I am looking for a cost effective way of replacing the battery bank and would ideally like to replace it with lithium ion however my main concern is whether or not the system is compatible with lithium batteries? And also how i would even go about configuring the Sunnyisland inverter to be setup with the new batteries.
I have spoken to a local offgrid electrician who was suggesting that sealed lead acid batteries still provide the best value for money and mentioned that lithium ion is not so great at handling the power surge demanded when appliances like the water pump kick in. Just curious if anyone can confirm this to be true.
I don't use a lot of electricity and only really need 3 or 4 kwh per day.
One option is just to replace the battery bank with the same cells as the original bank. So that would be 8 cells of 6v 330 sonnenschien. These sell for about $650 each here in Australia so about $5200 total for a 15.8kwh sealed lead acid battery bank. That is in AU$.
Another option is to buy 4 of these batteries:
QUANTIUM LITHIUM IRON BATTERY 24v — Solar Battery Warehouse
24V 100AH High cycle life 5000 @ 50% DOD Safest lithium chemistry In built-in over-charge and over-discharge protection Internal cell balancing Can be connected in parallel up to 4 batteries Drop-in replacement for lead-acid batteries 36-month warranty Australian owned and
www.solarbatterywarehouse.com.au
12v 200ah Quantium lithium ion batteries. Connecting 4 of these in series should deliver an equivalent 48V output but I am unsure if there will be other issues that may arise due to compatibility issues. This would give around 10kwh of capacity for around $5000 which seems to be the more economical option whilst still providing more usable capacity and greater lifespan.
Anyway, just interested if anyone has any thoughts or ideas they want to share on this topic. And if I was to go with the second option, what else needs to be done to make it all work other than connecting the batteries?
Thanks for your time.