This may shed some light:
1: Outback Inverter charger : 3KVa ~ 250k.
2: 100Ah 12 V Deep cycle pair (inverter charger is 24V), approx 24k each.
Total for the lowest power capacity: approx 300k.
The Significance of this assembly is that unlike fixed rated UPSes, here you have a system that by just adding batteries in parallel, you can have a significantly high power storage, decreasing cost for every additional KVA added to the system.
Suffice to say you can have three inverters connected to have Asynchronous power, single or three phase, and these can be treated as a cell and added to a pair to get 27KVA ....e.t.c.
If this is a long term backup solution, I suggest this.
There are many factors that affect battery life, but the rule of thumb is after 3 years they have lost most of their ability to store charge.
And no, car batteries can not be used. The type of batteries used in UPS and for solar power is the type know as 'deep cycle' which can handle the frequent charging and discharging. |Normal car batteries are not designed for that.
One of the leading manufactures of deep cycle batteries is a Korean company known as Gaston,. So whenever you are looking for solar or inverter batteries, always check for their batteries. They have batteries ranging from a few AH to over 200 AH and abovr. Most telcoms use them as backup system for the BTS equipment,.
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