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Old 27th July 2017, 10:42   #1051
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Default Re: Inverter Batteries

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What is the average life of an inverter battery?? Our Exide inverter battery completed its 11 years today, and still going strong
You're lucky coz most inverter batteries last for far less time. However, one thing that needs to be kept in mind is even if your battery is still functional it's capacity continues a slow gradual decline over the years.

So, excluding severe faults such as a short circuit or failed cell which would necessitate an immediate replacement, as a rule of the thumb just replace your battery when you feel the backup power is insufficient.
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Old 29th July 2017, 01:47   #1052
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Question on inverter wiring. If the DB has been segregated well with separate MCBs for each room's lighting circuit (5 Amp load), can I them wire inverter output to the lighting MCBs directly at the DB itself? I know if too many you are in use during a powercut the inverter will overload but that can be overcome by switching off unimportant devices at that time. Is there any other risk? We had this a few years back at another residence but I am not sure if this is a recommended approach.
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Old 29th July 2017, 10:53   #1053
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Default Re: Inverter Batteries

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Question on inverter wiring. If the DB has been segregated well with separate MCBs for each room's lighting circuit (5 Amp load), can I them wire inverter output to the lighting MCBs directly at the DB itself? I know if too many you are in use during a powercut the inverter will overload but that can be overcome by switching off unimportant devices at that time. Is there any other risk? We had this a few years back at another residence but I am not sure if this is a recommended approach.
Yes, that's what has been done at my home.

The output from the inverter is fed into the lighting and fan circuits for each room. I can control inverter input to each room should the need arise.

The concerned MCBs are all in 1 row within the DB. So the inverter output wire is connected to the inputs of each MCB circuit via a common +ve/hot wire. It is important to note the inverter output does not at any time bypass MCB protection.
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Old 19th August 2017, 12:10   #1054
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Default Re: Inverter Batteries

Can a 150 AH inverter battery be charged by a car's alternator (when the car is running of course), if the inverter battery is connected in parallel to the car battery? I do know this will wear out the alternator if done on a regular basis. But curious if it is doable once or twice. Assuming the alternator is 95 amp.
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Old 19th August 2017, 12:58   #1055
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Default Re: Inverter Batteries

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Can a 150 AH inverter battery be charged by a car's alternator (when the car is running of course), if the inverter battery is connected in parallel to the car battery? I do know this will wear out the alternator if done on a regular basis. But curious if it is doable once or twice. Assuming the alternator is 95 amp.
Yes it can, but you will have to monitor the charging current. Assuming that your car battery is 70AH, the total load is 240AH, which means that 90A will charge in about 3 hours
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Old 19th August 2017, 14:02   #1056
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Default Re: Inverter Batteries

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Originally Posted by Tanmay K View Post
Can a 150 AH inverter battery be charged by a car's alternator (when the car is running of course), if the inverter battery is connected in parallel to the car battery? I do know this will wear out the alternator if done on a regular basis. But curious if it is doable once or twice. Assuming the alternator is 95 amp.
It can certainly be done but you'd spend an awful lot of fuel charging what will be a 230AH battery (150AH + an assumed 80AH car battery) not to mention needless wear and tear on the car's engine and alternator especially if done frequently.

If you really need to charge this inverter battery using alternative means, i.e. other than the mains, consider solar panels OR even a small genset which in turn can power a 12V battery charger.
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Old 19th August 2017, 15:47   #1057
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Default Re: Inverter Batteries

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Originally Posted by Tanmay K View Post
Can a 150 AH inverter battery be charged by a car's alternator (when the car is running of course), if the inverter battery is connected in parallel to the car battery? I do know this will wear out the alternator if done on a regular basis. But curious if it is doable once or twice. Assuming the alternator is 95 amp.
95 AMP is more than enough to charge a 150AH battery. Usually I am using 6 amp chargers to charge 50 AH batteries. Usually car manufacturers always give higher rated alternators which can charge a smaller battery even on a short ride or at lower RPM. So there is plenty of redundancy built-in into your stock alternator.
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