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Hello PowerForum Users, So i have a client with an issue that is now becoming a big issue, and i dont know how to advise them or resolve it. So they purchased a 3 phase generator around 8 months ago, yes it is still under warranty, and when this issue started it went back in for a service, so around 2 weeks ago. The issue is this generator is randomly spiking at over 300 volts, it has alreaady damaged the backup inverter batteries that have gone in for repair, and now it is killing the 6kva UPS they have for their IT equipment. So the UPS is set at 264v maximum, so whenever there is a spike, the UPS takes over and switches to its batteries, and with loadshedding 3 to 4 times a day as well as these constant spikes mean all batteries are cycling way more than they should every day, and the UPS batteries are almost gone now as well (2 months older than generator) The generator after the service went back, and a cable was replaced, this was last week, and it seemed to stabilize a little but now once again this is happening, the UPS cant take it and is turning off and the company is down. Now since they have taken it back twice, and the company who sold the generator states that it is working as intended, what can i do to try and sort this out. The inverter is coming back soon and i really dont want to destroy the new batteries while there is this issue. Can i put anything in place to protect the load somehow, and what would i need, where can i get it?

Just an update for anyone else who may have an issue like mine. I contacted Geewiz, and they helped replace the battery and explained there has been some bad batteries in the Vestwood 50ah battery range, its just random batteries and not a single batch number so they cant say which are good or bad. They replaced the battery with a SecurityProd 50ah lithium and its now working perfectly. Thanks for all the help.

I have a solar company coming on Tuesday so i will also see if they have some good deals, or else i will definitely be looking at the Axpert, thank you for all the helpful information.

Just an update, so the UPS is running 3 x 12v 28ah batteries in series, so 36v 28ah in total. So i would not be able to use the lithium battery for this UPS unless i had 3 of these batteries.

Thank you for that information i will have to get a 12v LED and connect it. So i have a Mecer Modified Sinewave inverter, 720w or 1200va, with a 100ah lead acid battery thats dying, connected to that i have an old MGE Pulsar 1000 Online UPS, which has 3 x 28ah 12v batteries connected instead of the 3 x 7ah that are standard. The reason for the UPS is protection, since inverters dont protect from spikes as well as dont always kick in fast enough unlike a UPS. The reason for the Inverter before the UPS, is the added runtime, which when running a server or 2 and load shedding kicks in, to get them shut down if they are half way through something like an OS install or VM migration, is not always quick and easy. I will definitely look into this, thank you. You mean the Sine Wave UPS? With the Axpert, since it is an inverter and not a UPS, i would still need a UPS anyways, but since i am looking for something to run the 50ah Lithium this is a good option and idea, thank you for the reply.

It is an Online / Pure Sinewave UPS, it has 3 x batteries which i have replaced and is now running 3 x 28ah Lead Acid batteries, it has options to install all the way up to 100ah batteries, and can change the charger accordingly. I work in IT and i need an online power source as i look after / maintain / repair a lot of servers, hence why that is in front of the Inverter as it is more important, add to that i have my router, TV and WIFI mesh after the UPS as well which will protect the load, unlike an inverter. I had it set to 20amp and it charged the full cycle, fans went quiet and the LED went solid green, as soon as power was removed from the Inverter, which had 0 load and was in fact charging through the UPS, for testing, as soon as no power to it, it just turns off, no beep, no warning, just dead. If i press the power button, nothing happens, if i keep it pressed in for 20 seconds, nothing happens. When i put the 100ah lead acid battery back, it works perfectly just for only the 15 minutes till the battery is dead, i have checked with the meter the charge on the lead acid battery at full charge and when its dead, and it does seem to be working according to its specifications, so there is no issue with the inverter. So my other question, you are saying: Lead Acid = 10 amp Gel = 20 amp Lithium = 20 amp? Thank you for the quick response. I do have a feeling the issue is with the Vestwood BMS, so i sort of wasted money until i can find a good prices inverter that will take it, which has to happen in the next 3 months since the Vestwood charged and i have read it is bad to leave a lithium battery with charge for longer than 3 months. EISH.

Hello everyone, So i purchased a 12v 50AH Vestwood Lithium battery on special, as Lead Acid batteries just dont last and i thought a 50AH Lithium would be a good upgrade (and worthy downgrade from 100AH to 50AH) to allow better and longer battery life in my Inverter. Since i did read up before, about people replacing with a Lithium battery in their Mecer IVR-1200LBKS with most forums stating it worked fine, and/or worked great, i thought it would be as simple as finding a drop in replacement and swopping batteries and it would work. But it didnt. If i have the Lithium battery installed, it wont start on the 10 amp charge setting, then when on the 20 amp setting the inverter runs the fan for a few hours and then stops the fan with the green LED solid instead of flashing, which usually indicates the battery has been charged. So all looks good, but as soon as power is removed / load shedding starts, the inverter just turns off, and if i press the power button nothing happens. I have checked the Lithium battery voltage which shows 13.72 volts, which to my knowledge would mean the battery is working and did charge. Does anyone know why the inverter would do this, or what i can do to make this battery work with this inverter, i cant really afford another battery. The inverter is only charging an Online 1KVa UPS which powers my devices, but the issue happens even when there is no load. When i put my old 100ah Lead Acid battery back, it works just for only around 15 minutes due to the battery being old. Also, what is the best amp selection for each type of battery? Lithium - 10 or 20 amp?? Lead Acid - 10 or 20 amp?? Gel - 10 or 20 amp??