February 8, 20233 yr Hi all I just want to get all my ducks in a row before the battery arrives. 1. For now I will only ever have the two batteries connected to the inverter - is it ok to wire it up as per the pic in the manual - making sure that cable lengths are equal where applicable. 2. Do I absolutely HAVE to have the new battery at the same SOC as the "old" one when commissioning - lets assume the new battery is at 75% SOC when unboxing, will it balance with the original over a few charges and discharges? Or should I disconnect "old" battery (at 100% SOC) and connect the new battery and fully charge to 100% and then reconnect both? The "old" battery was commissioned in August so only has 132 cycles on it. Reason for second battery is two-fold, 0.5C discharge on these and I want longer running capacity. The 0.5C discharge limit hasn't really been an issue but I have now had once or twice where a lawnmower is connected by garden services and then it kak's itself. The longer running capacity is what I am more after - we very very rarely go over 2.5kw load but I think it is better to have the battery balanced with the inverter capacity. At the time when I purchased the system I wasn't aware of the discharge rate specification on batteries. If I did know about it I would have baught a 1C battery.
February 8, 20233 yr 8 minutes ago, Douw G. Gerber said: Hi all I just want to get all my ducks in a row before the battery arrives. 1. For now I will only ever have the two batteries connected to the inverter - is it ok to wire it up as per the pic in the manual - making sure that cable lengths are equal where applicable. 2. Do I absolutely HAVE to have the new battery at the same SOC as the "old" one when commissioning - lets assume the new battery is at 75% SOC when unboxing, will it balance with the original over a few charges and discharges? Or should I disconnect "old" battery (at 100% SOC) and connect the new battery and fully charge to 100% and then reconnect both? The "old" battery was commissioned in August so only has 132 cycles on it. Reason for second battery is two-fold, 0.5C discharge on these and I want longer running capacity. The 0.5C discharge limit hasn't really been an issue but I have now had once or twice where a lawnmower is connected by garden services and then it kak's itself. The longer running capacity is what I am more after - we very very rarely go over 2.5kw load but I think it is better to have the battery balanced with the inverter capacity. At the time when I purchased the system I wasn't aware of the discharge rate specification on batteries. If I did know about it I would have baught a 1C battery. The wiring is spot on and it works well in that setup. My 48100s are wired similarly I did not have my batteries at the same SOC when i got he second one - i just let them balance up to 100% over a few days - not saying this is the best way to do it but that's how i did mine. i know others (especially with Pylons) do try to get the new battery at the SOC as the older one(s)
February 9, 20233 yr I have just upgraded my system with another 5.1 kW battery. I have 2 x batteries now. I have to reset the inverter now for example the shutdown %, alarm% and the restart %. As I have twice as much storage capacity now, can I half the previous settings? My understanding is that 50% of 5000W is the same as 25% of 10 000W or is it not the same. For instance the shut off value were set at 20% ( 1000W). If I leave it at that, it means I would have 2000W left on the 2 batteries. Is that not a waste of power. The same for the restart. Mine were set for 40%. If I leave it on that, It would take much longer, but if I set it to 20%, it would be the same as before.
February 9, 20233 yr 1 hour ago, TransNamib said: I have just upgraded my system with another 5.1 kW battery. I have 2 x batteries now. I have to reset the inverter now for example the shutdown %, alarm% and the restart %. As I have twice as much storage capacity now, can I half the previous settings? My understanding is that 50% of 5000W is the same as 25% of 10 000W or is it not the same. For instance the shut off value were set at 20% ( 1000W). If I leave it at that, it means I would have 2000W left on the 2 batteries. Is that not a waste of power. The same for the restart. Mine were set for 40%. If I leave it on that, It would take much longer, but if I set it to 20%, it would be the same as before. I would set a 10kwh to 10 or 15% shutdown and restart at 20%
February 9, 20233 yr 54 minutes ago, Chris_S said: I would set a 10kwh to 10 or 15% shutdown and restart at 20% Thanks Chris. Exactly what I think.
February 10, 20233 yr Author On 2023/02/08 at 5:22 PM, mzezman said: The wiring is spot on and it works well in that setup. My 48100s are wired similarly I did not have my batteries at the same SOC when i got he second one - i just let them balance up to 100% over a few days - not saying this is the best way to do it but that's how i did mine. i know others (especially with Pylons) do try to get the new battery at the SOC as the older one(s) 2nd battery installed and all looks lekker - thanks
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.