Aveer

Hi How do you calculate the time to recharge your lithium batteries from solar or generator. For example if I have a 5kw inverter, 5kwh battery and 2.5kw of panels, is it just 2 hours? Or are there other factors to consider. Similarly if I have a 2.5 kwh generator. Thanks

Hi, Can you recommend which battery brands have good aftersales service in terms of repairs. Thanks, Aveer

Hi, Does anybody have experience with Esener lithium iron batteries? It is supplied by Es Energy in Midrand. https://www.esener.co.za/esener512-100ah.html Product Description The ESENER 51.2V 100Ah is a high quality lithium-ion phosphate battery with a lifecycle of more than 6000 at 80% DOD, and can be used for 10-15 years. The battery offers a low internal resistance with excellent continuous high current discharge performance. Details Advanced BMS with current limiting factor CAN Bus, fully integrates and communicates with leading inverter brands (Growatt, SOLAX, LUXPower, DEYE, MUST, Voltronic, Victron, SMA, etc.) Excellent high temperature performance High Cycle Life and Service Life 1C High Performance Lithium Battery High Energy Density and Conversion Efficiency Complete with integrated Battery Management System Compartible with most inverters and chargers Low self-discharge Easy wall mount or shelf rack installation Heavy duty side handles for easy handling and mounting to the wall Built in protection for over-charge, over-discharge & over-temperature Specifications Model: ES-5.12KWH Rated Capacity (5HR): 110Ah Voltage: 51.2V Discharge Cutoff Voltage: 40.0V Equalised Charge Voltage: 58.4V Maximum Continuous Charging Current: 100A Maximum Continuous Discharging Current: 100A C. Rating: 1.0C Weight: Approx. 46kg Display: LCD Parallel: Parallel connection up to 15 packs with full communications Dimensions (WxDxH): 505mm x 162mm x 543mm Ports: 1x CAN Bus, 1x RS-485 Battery Link ports, 2x Parallel Instruction Ports Cells:New Li-Ion Prismatic Cells Design Life: -/+ 15 Years Cycle Life @ 1C: +/-4000 Cycles @ 100% DOD, Above 6000 cycles @ 80% DOD Certification: CE, UN38.3, IEC, MSDS Outer Package Material: White bake lacquer steel case Operating Temperature: Charging: 0 to 50°C, Discharging: -10 to 50°C, Storage: -10 to 50°C Protection: Electronic Circuit Breaker, BMS Voltage Protection, Current Limiting

@Kalahari Meerkat thanks for this info. What do you advise as the maximum load for 2.5 hrs runtime and 4.5 hrs runtime. It does seem like the attached Ellies manual is over-stating what the unit can do, or perhaps not stating that you will kill the batteries if you run it at high load. Quick-Reference-Chart-Guide-Ellies-Trolley-Inverters.pdf

@zsde I have tested and it seems one battery is bad, as it registered 10.8 V. Thus it seems the battery centre test isnt reliable. Thanks.

Thanks I will check that.

Hi, I have a 1000w ellies trolley inverter (24v) with 2 x 105Ah lead acid batteries (2.5 kWh). I'm finding that the battery is only lasting 1.5 hrs during load shedding with a load of 440w. I was expecting the batteries to last at least 4 hrs at this load. I have a meter on my DB which shows a voltage around 200v and current of less than 2 amps, hence my 440w load estimate. I assumed the batteries were end of life, but had them tested at a Battery centre and they reported 100% health and 100% charge. 1) Is it possible that the battery centre test is not good enough? 2) Any other test I could run on the batteries? Thanks

I'm looking for any recommendations on reputable brands of lead acid batteries.