January 10, 20233 yr Hi all. We have a couple of those 200Ah trolleys. One suddenly stopped delivering any output during loadshedding. Floats at 13.6V but won't carry a 200W load when the power drops. Less than a year old. I know we had extreme loadshedding but is this normal?
January 10, 20233 yr What is the cutoff voltage set to? Usually it is below 12V by default which is not good for LA batteries.
January 10, 20233 yr Author No idea ... I will check. But I think part of the problem is the charge rate is set to 10A. Just not enough recharge between loadshedding cycles. Will up to max (20A) when I get in.
January 10, 20233 yr 1 hour ago, Scubadude said: No idea ... I will check. But I think part of the problem is the charge rate is set to 10A. Just not enough recharge between loadshedding cycles. Will up to max (20A) when I get in. Yes so when the next bout of loadshedding hits, the battery gets depleted below the recommended minimum SOC of 50%. This kills the battery and a 1 year max lifetime for the batteries is not unusual. A friend has one of these trolleys and 1 week past warranty the batteries rapidly declined. The supplier now only gives 6 months warranty as it is common for the lead acids not to last a year. I think the quality of some of the lead acid batteries is below average to start with...
January 10, 20233 yr 4 hours ago, Scubadude said: Hi all. We have a couple of those 200Ah trolleys. One suddenly stopped delivering any output during loadshedding. Floats at 13.6V but won't carry a 200W load when the power drops. Less than a year old. I know we had extreme loadshedding but is this normal? lead acid/gel batteries? They're probably kaput. I have yet to see these trolley type setups survive loadshedding. My old setup barely made it through stage 2 loadshedding, and was dead after 8 months
January 10, 20233 yr 5 hours ago, madness_za said: lead acid/gel batteries? They're probably kaput. I have yet to see these trolley type setups survive loadshedding. My old setup barely made it through stage 2 loadshedding, and was dead after 8 months Same here. AGM battery degraded after ~8months. I was provided a trolley ups as part of WFH to keep my laptop, 23" screen, router, wifi, ont, vpn gateway working during load shedding. The load was ~100W. There were a few thousands other staff also provided with the same setup. The inverter, by default would allow discharge to 10.5V - which is bad. Since it was provided by work we were not allowed to change any of the inverter settings. The expectation was that ~100W for two hours of load shedding would not drop below 50% SoC. Unfortunately we experienced a few suburb outages which ran into 6+ hours each. Suffice to say, that after 8 months the battery degraded to the extent that it would not sustain ~100W for 2 hours. They replaced the battery at ~8 months - most of my colleagues had to have the battery replaced within the first year. I configured the inverter with 12.06 (50%) shutdown. Since then I've upgraded (see signature for details).
January 10, 20233 yr Author 5 hours ago, system32 said: I configured the inverter with 12.06 (50%) shutdown. Looks like my inverter has only two settings - 10A/20A charge and narrow/wide (something to do with input voltage). Or am I missing something? The supplier now carries this handy notice on their webiste ... seems I'm not the only one. Edited January 10, 20233 yr by Scubadude
January 10, 20233 yr 22 minutes ago, Scubadude said: Looks like my inverter has only two settings - 10A/20A charge and narrow/wide (something to do with unpur voltage). Or am I missing something? The supplier now carries this handy notice on their webiste ... seems I'm not the only one. Mine has a LCD display & keypad, found the manual online, changed parameter 19:
January 10, 20233 yr Author 2 hours ago, PowerUser said: @Scubadude what brand batteries are inside the trolleys? Some Vietnamese name I never head of.
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