Then we move onto the device which was until recently the most sold solution, the 3 KVA axpert unit with 2 x lead acid batteries

This was the entry level unit to connect to the fixed electrical installation.

It is one of the cheapest intial outlay options, until you start adding up the battery replacements every 6-9 months, not because the unit is badly dsesigned, but rather because the installer didnt set the cutout voltage. If you drop it below 11.75 VDC, you might as well just piss the maney against the wall. If you get this setting right there is a good chance your batteries will last around 3 years, then you are in for around R2.5 - 3 K per battery to replace.

An ideal application for people who dont have a hundred K plus to throw at a full lithium solution.

If you just want to keep the lights on and a few light loads like the TV, router, alarm and maybe a small fridge, then this is a good option. You will notice an increase in your electricity account because the batteries will need to be charged using the grid power.

Yes it is a 3 kw unit (3000 watts), but you need to understand that if the load is 3 kw, your battery will be dead before you finish your pop corn.

The good news it is not a total waste, why because you can upgrade to lithium batteries and you can connect a solar panle or 2, so that you can reduce the cost to charge the batteries.

One good thing about these units is the fast switching time, you will barely notice the changeover from grid to battery and back to grid.

Another plus, the ease of installation, we mount the unit with all Battery DC isolator and AC bypass control box complete with grid bypass and mcbs, to a board. We do the full setup and prgramming in the workshop, disconnect the batteries, once on site its 4 coach bolts, reconnect the battery and install the the 4 core surfix into the DB. Once connected the unit is ready for load shedding. If you want to save a few bucks, you can always fit a panels later.