Bought mine 2 months ago with the special from Huawei which included installation- just the 5kW model (R73,000) -only to find that the 5kW inverter only inverts at 2.5kW - unless you install a second battery to bring it up to 10kW. I suppose that's logical since you don't want to kill the battery, however, not mentioned at sale of unit. Anyway, so far so good, im impressed, and it works great. I had my db split into kitchen + geyser (heavy appliances like fridges/washing machine still on Eskom for now) and rest of the house plugs/lights. No more peeing in the dark or by torchlight -this unit is amazing, as its absolutely quiet, and the only noise is when the relays click in/out when solar becomes active ! A couple of times there has been a whine from the unit -probably we were using more power? -But the noise is no more than, say, a running fridge. We use so little power, after 4 hrs load shedding the battery still has about 75% charge. Also, I now have PV installed for about 2 weeks, and it is amazing to see during the day that the rest of the house is run off the solar ! However, something to note is that now that the system has PV supply and the contractor connected it to the FusionSolar web app, we run off the battery from sundown to sunrise! At this time (+/- 6am) the battery is at about 50 to-53%. Grid kicks in at 50% to trickle charge until the solar kicks in, at which time grid is disconnected, and even on a slightly cloudy day the house is run off solar, while the battery is being charged. On a heavier cloudy day, if the solar has a low output, then we may see grid power supplied to house loads while the solar slowly charges the battery. I battled to understand why the contractor (contractor has exclusive access to modify the plant) was unable to get us off using the battery at night, since I cant see those settings he was talking about. I guess more info is needed for "owners" access to the unit. While thinking this through, I realised why not use battery? If we get about 4000 cycles, at 365 days/year, that's like 10years ? So why not make full use of the battery? I guess we need to change our mindset about "battery for backup only" ? Think of it this way -we don't buy a car just to park it in the garage for the odd occasion that we might need to use it -well maybe if you're a collector :) ? So why spend the money on a battery then don't use it? Now the question is, do I eventually fork out more for an upgrade to a 10kW battery and add the fridges to the inverter as well?