The solar power sun is rising
There was little warning of the impending power cuts (called load shedding here). Just a notice from the government owned utility, ZETDC, in the press and the next day we were cut off for 8 hours. That was 10 days ago and they have been very regular since then – alternating mornings and afternoons.
The first one coincided with the demise of a set of lead-acid batteries we’d bought of a local manufacturer in February for our solar system. They’d just been returned under warranty and we’d decided to go upmarket and more reliable. After a lot of reading up and phoning around and being promised all manner of quality and prices I visited a supplier whom I’ve dealt with in the past and who I know supplies quality equipment. He also knows what he’s talking about. An hour later and he’d convinced me that lithium batteries were the way to go with their 10 year warranty and superior charging characteristics (3 hours under bright sunlight). Initial outlay is high but lead acid batteries only have a one year warranty for most types.
We duly dug into our savings and paid up. Much to his embarrassment the supplier then discovered he didn’t have any lithium batteries in stock so lent us a set of lead-acid gel batteries that were to be returned to the factory for some minor defect. Going back to the outlet today to get some further information on the new lithium battery one of the senior staff confided that ZETDC had told them that the power cuts were going to get MUCH worse. It was not just sales talk.
Zimbabwe most of its power from Lake Kariba on the Zambezi River on the country’s north-west boundary with Zambia. Both countries have been over-utilizing this water resource for some years now and the lake has fluctuated far more in recent years than in the past. Add to this the fluctuating rainfall and we are into dangerous territory. It should be said that a large proportion of the water that flows into the lake comes from northern Angola and central Zambia which has more reliable rainfall than Zimbabwe.
The dam was finished in 1960 and since then the turbines have been upgraded and the power stations on both banks of the Zambezi River have been expanded. It is the largest man made lake by volume on the planet and such is the mass of water that it is not unusual for the residents in the area to experience minor earthquakes. Such is the volume of water that can be released from the floodgates that it was feared the vibration could cause damage to the wall and it is very rare for more than 4 of the six floodgates to be opened at any one time. The plunge pool, where the spilling water falls, has undercut the foundations of the wall beyond permissible limits and has to be stabilized along with overdue maintenance on the floodgates. This means that the dam should not be allowed to spill until the work is complete so this last rainy season substantial water was allowed to flow from the dam before the flood waters come down from the upper Zambezi, usually in April. It seems that someone got the maths wrong, let out too much water before checking how much rain the catchment had received which was less than normal, and now there is barely enough head of pressure to keep the turbines going. Add to this the fact that one of the turbines at Hwange, the large thermal power plant in the west of the country, is out of commission and we have a power supply crisis. Alternative development projects, such as solar, have failed to come to fruition due to the dismal credit rating of the country.
This of course is not bad news for the sellers of alternative power systems. Whilst it is certainly cheaper to buy and fuel a generator than a solar system in the short term there is also the added complication that we have a fuel supply crisis. This has been ongoing for some months now and is driven by a lack of hard currency to pay for the imported fuel. Fuel queues are long and ubiquitous if one wants to pay in the local currency (now just referred to as ZWL). For those who have hard currency there is no queue and fuel is always available.
One could be forgiven for thinking that this is the death knell for the local currency and it may be, but the vast majority of Zimbabweans just do not have access to hard currency (usually the $US). The country is not earning much hard cash from limited exports and already the government has reneged on it’s promise to pay tobacco farmers at least a portion of their earnings (the majority of the crop is exported) in US dollars. Appeals to South Africa to sell us power is likely to be refused; they too are inflicting load shedding on their population due to a lack of power capacity. In their case, the local power authority – Eskom, is guilty of lack of development to meet increasing demand and corrupt dealings and over-paying senior management. Anyway, they would demand hard currency which we don’t have.
Downstream of Lake Kariba, in Mozambique, is Lake Cahora Bassa. It too is a large lake built to generate hydroelectric power which is mostly sold to South Africa. Not surprisingly it is full thanks to the outflow from Kariba and I’ve heard speculation that Mozambique will be approached to supply us power. Once again, we don’t have the money to buy it. It’s not looking good at all until at least April next year when the flood waters from the upper Zambezi reach Lake Kariba assuming the rains will be good in the catchment area. The government has promised not to cut power to the vital mining sector but its track record on promises is poor.
Meanwhile the local currency is under severe devaluation pressure. Just this last week the unofficial rate (what it can actually be bought for vs the “official” rate as quoted by the central bank) has fallen from 5 to the US dollar to 7. The official rate of 3.5:1 US dollar exists only on paper. Many outlets have stopped quoting goods in local prices and some, such as the accounting firm that holds my company documents, is demanding only US dollars. The ZETDC power utility is owed millions in unpaid accounts and our electricity price has remained at 14c (local) per unit for years despite the falling value of the currency. It has appealed to the government to raise tariffs but the last application was rejected – the government doesn’t want to foment unrest. They may have missed the bolting horse. Today I was shown and anonymously authored WhatsApp message announcing a mass stay-away. Details were sketchy, deliberately I think, but the message was clear; we’ve had enough.
Mass stay-aways in the past have had limited success but have clearly rattled the government which has responded with shutting down the internet and crushing any demonstrations with a very heavy hand. The WhatsApp circular advised people to remain peaceful and stock up on essential supplies. Sound advice for those who can afford to pay for them – a forever diminishing proportion of the population.
ay since cyclone Eline hit Zimbabwe back in February 2000. Cyclones, as hurricanes are known in the southern hemisphere, rapidly lose power over the land as they need water as their power source (the water is sucked up as vapour, condenses releasing latent heat of condensation which draws up more water vapour) so they rarely get as far as Zimbabwe though they can cause significant rain as far inland as Harare. There was plenty of time for an evacuation to safer ground and when asked why the government did not effect this the reply was that the opposition MDC would have used the opportunity to accuse the army and police of using force and rape to make people move.
