The power is on (for the moment)

7 09 2019

As I write this we actually have mains supply power. According to our neighbourhood WhatsApp group it’s because a dignitary is attending a function at a local sports club. By dignitary I mean someone with political clout. That way they can pretend that all’s well in the power supply situation when the reality is 18 hour power cuts every day. We are in this mess for several reasons, the main one being we have possibly the world’s cheapest power at US3c a unit (kWh). Until very recently it was 1c.

It wasn’t always that way. Back in the days when we were using real US$ and nothing else it was around 10-14c a unit and power was plentiful. We could import what power we needed from Mozambique and South Africa and even if the rest of the economy was a mess, which it was and still is, power was there if you needed to use it. Then in 2016 the government decided to introduce another currency called the “Bond dollar” which locals quickly nicknamed the “bollar” or “zollar”. The government insisted it was equivalent to a US dollar and was backed by a bond from the Egyptian Afreximbank and it was there to reduce the problem of small change. It was a lie. There was no bond, those who could withdrew their real dollars from the bank and those who couldn’t watched as the value of their accounts was whittled away by the informal market exchange rate. Eventually the government admitted that the bollar was not equivalent to a US dollar and pegged it at 2:1. The informal market ignored it and the rate soared to 12:1  before the government made it illegal to trade within the country in anything but bollars which were now called new Zimbabwe dollars (though we have yet to see any actual notes). The official exchange rate has now risen to around 14:1 which is why our electricity is ridiculously cheap. We were informed earlier this year that our bank accounts that had been in US dollars were now in Zimbabwe dollars – and so was our real money stolen.

We now owe US$73 million to the power utilities in Mozambique and South Africa with no real hope of paying it back and getting ourselves reconnected (not surprisingly they refuse to continue to export power to us). We need to import power because local thermal generators have been badly neglected because they have not been charging enough for the power (the government regulates power and fuel charges). This means that maintenance has not been done and our main source of hydro power, Lake Kariba, has been over-utilised beyond its design limitations. To compound the mess last season there was poor rains in the main catchment area in north-western Zambia and Angola.

The effect of lack of maintenance cannot be over-estimated. Apart from effeciency loss in old switch gear and old machinery (turbines), transmission efficiency is also affected. Insulators get covered in dust, rain turns the dust to mud which then causes shorts to the supporting structure which heats and cracks the insulator. Local losses are around 12% (I’m told the internationally accepted level is 7%).

The local power utility, ZESA, has embarked on a programme of power cuts or load shedding as it’s known locally. Alternative energy suppliers’ businesses are booming. The Reserve Bank estimates that the diesel fuel import bill has jumped 20% since the power cuts started as people and businesses buy it for their generators – money that could have been put into importing power in the first place.

It doesn’t take a huge imagination to realize what the consequences of these draconian power cuts are going to be. Some of the bigger mines import their own power directly from South Africa but the smaller ones, which apparently are given priority, have to make do. Farmers irrigate their crops in the dead of night when the power comes on, usually between 10 p.m. and 5 a.m. but this is often not long enough for a full cycle and I’ve heard of farmers abandoning their winter wheat crops which have demanding irrigation requirements. Tobacco seed sales were down 30% in April but this was as much to do with the government reneging on it’s promise to pay a proportion of the sales in hard currency as a lack of power. The early tobacco crop (tobacco is a major foreign currency earner) does require irrigating and supplementary power sources for the irrigation will likely make an expensive to produce crop excessively so.

Cell phone connectivity is now noticeably reduced as service providers have to rely more on backup power sources – usually diesel generators and the cost of airtime has gone up considerably.

We recently had six days with no power at all – just us and a neighbour across the street. Marianne went into the local ZESA offices to see whom she could get to come and have a look. A technician duly arrived and walked around the property then said he’d go and have a look at the sub-station (which supplies the suburb) and nothing happened. The next day the neighbour tried with no success. By now we were having to throw away food as our solar system couldn’t cope with running the fridge, deep freezes and other appliances and borehole pump 24 hours a day. So I went along to the offices, fully prepared to have to pay a bribe/sweetener to get something done.

I asked for the local manager with whom Marianne had spoken and introduced myself by commenting that we had more in common than he realised – we are both going bald. He laughed and I knew we were off to a good start. After explaining the problem I asked him what the future of our electricity supply was. Without saying anything he pointed to the ubiquitous portrait of the President, E D Mnangagwa, that seems obligatory in government offices. I replied “Please don’t point to that picture and tell me Zimbabwe is open for business”. The occupants of the office found it hugely funny. The slogan “Zimbabwe is open for business” was widely used by ED, as the President is known, in his election campaign.

“Are you and engineer?” I asked the manager.

“I am” he responded.

“So”, I asked him, “what happens when the water level in Kariba gets too low to be used for power?”.

“We turn it off” he replied.

“You mean the whole country?”.

“The whole country” he confirmed.

“Unless we can find some money to import some power. But that’s unlikely to happen so long as we have the world’s cheapest electricity?” I responded.

He nodded to E D’s photo without commenting.

That afternoon our power supply was restored and I hadn’t needed to part with any money – sometimes engagement is all it takes.

I don’t expect that the whole country will be turned off anytime soon. Certain areas in Harare, where we live, seem to be exempt. The grids surrounding the main hospitals and the President’s residence don’t get power cuts. A friend who lives close to the state controlled broadcaster, ZBC, never gets power cuts. Another friend who lives in a rural part of Zimbabwe in the east is on the same line as a senior ZESA executive never gets cuts either. That said I’ve told Marianne that we need to expect ever more draconian cuts – we don’t live near anyone or anything of political consequence.

Some four years ago I was living on a farm close to where I work. It was for me the perfect existence – close enough to town to be convenient but far enough away to benefit from the peaceful countryside. Whenever there was a thunderstorm the power went off and could take several days to get it fixed. I got fed up and bought a small solar system to keep the fridge and deep freeze running. I’ve always been a bit of a geek and liked the idea of a bit of independence from the grid and yes, I got a bit of a fuzzy warm feeling that I was doing something good for the environment.

The system worked well and it was upgraded by two panels when we moved into town. Then earlier this year as the load shedding was introduced the original lead-acid batteries had run their life and needed to be changed. It was evident that the power cuts were only going to get worse so we decided on another upgrade. Foolishly we bought locally manufactured batteries which only lasted 3 months but at least we could pay for them in local currency. The company that sold them to us did admit there was a problem and replaced them but we’d decided to go with an initially more expensive but much longer lasting lithium battery. Yet more photovoltaic panels were added with our closely guarded US dollars and now we have a nearly-off-the-grid system. It’s OK if we get a few hours of mains every night to charge the battery but if it gets to the stage where we’re completely cut off (no important neighbours to please) we are going to have to think of upgrading yet again. It will be money that could have been spent on a couple of really good holidays.

Panels are put onto the structure. Whilst I did most of the welding I had to get a specialist welder in to do the final work

The area where my nursery is has been relatively unaffected by power cuts. The research farm where I used to live is on the same grid and likes to claim some responsibility. I think it’s mostly due to the military barracks just down the road – can’t annoy those that keep the government in power now can we? Whichever it is it’s unlikely the situation will last so just before the recent slide in the local currency I invested in a solar powered borehole system whilst I had the money. Fortunately I have a young friend who has a qualification in solar systems and he helped me put it in by doing the design work whilst I did most of the welding of the structure. We did have to wait a month to get the electrics hooked up as the electrician was simply too busy doing other installations. In a rare moment of common sense the government has removed duty from solar panels and other associated equipment so those who can afford it are scrambling to install systems.

So far our system works fine, weather permitting. It cannot pump all the water we need so we are still reliant on getting at least some power to keep the water tank full and if the power goes off during the day, as it sometimes does,

there is a generator but it can go through 25 litres of diesel a day which of course is in short supply.

The price of power has recently gone up by up to 300% but it is still ridiculously cheap especially since the exchange rate with the US dollar has started to run again. There is no obvious way out of the mess.

The final wiring gets done. The system allowed for the original pump and motor to be used so required specialist knowledge


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Categories : Economics

Farming

5 09 2016

Farming in Zimbabwe is pretty challenging but Zimbabweans are adept (some would say notorious) at “making a plan”. Let me give you an example.

led lampThat circled object in the photo above is a LED light mounted on the railing outside my office. It was temporary you must understand; a necessity of circumstance, the best I can do at that moment to provide some security lighting.

Last Tuesday (10 days ago at the time of writing) the electricity cables that supply my business and several properties in the area were stolen. I was getting into the shower as the power went off – I don’t live at my work but the house is on the same grid. It was 10.30 p.m. Of course I didn’t know at the time the cause of the power cut but the next day I received a SMS from the foreman saying the lines had been cut. I thought he meant broken as when a tree falls across a power line as it had been windy. No, he really did mean cut. I had a look when I got to work and was surprised to see the wire cables were made of copper. They were certainly old – all the line I’ve ever seen have been an aluminium alloy. There is a strong demand for scrap copper and once it’s been melted down there is little chance of being caught.

ZESA, the electricity supply utility, came and had a look and by the next day was on the job. I chatted to the foreman on the way out and he said not to worry, they’d have us back on-line that evening. I asked if they were going to replace the other copper line before it was also stolen. No, they weren’t. But he did think the thieves would be back for the rest. Apparently he found this funny. I thought I’d better look into buying a heavier duty generator as the one we had was only for standby situations and not suitable for long periods of use. I asked him how they’d stolen the live cable without getting electrocuted. Must have  been experts he opined. I didn’t add that I thought they were probably ZESA employees or certainly had been.

On Thursday I bought an 11kVA generator, big enough to run all the essential equipment; 3 borehole pumps, 2 irrigation pumps and security lights. It cost $5750 and is a prime power generator meaning it can be run continuously if necessary. There was not a huge choice in the range that I could afford and as I couldn’t wait for the bank transfer to go through I paid a cash deposit and the generator was delivered “first thing” on Friday which turned out to be 2 p.m. Power came back that evening as did the thieves and another 400m of cable was stolen. By Tuesday morning the generator already needed its first service – it had clocked up just over 50 hours and paid for itself. Seedlings really cannot run out of water.

On Monday it was evident that one of the borehole pumps was not running properly. I had changed it on Thursday from a 3 phase to single phase motor, so it could run on the old generator, and the control box was tripping the power supply off. Pumps use more power when pumping more water so once the pipe was full it would draw less and settle down. The pipe (all 400m or more of it) should have been staying full but it seemed that none of the non-return valves that should have prevented the back flow were working. So my landlord set about replacing them.

I engaged the services of an electrician to install the change-over switches to allow us to switch between the generator supply and the ZESA mains supply. Normally I would have tackled this as it’s well within my understanding of electrical wiring but he was in the area so I thought I’d take the easier route. It was just as well that I didn’t feel like doing it as he spotted a major problem in the switch box that would have ruined the generator. The generator ran all weekend while we set about trying to solve why the one borehole kept switching off. By Monday I’d had enough and went to the irrigation supplier who told me that it was a voltage problem. My thought was that it was just too sophisticated for Zimbabwean conditions so I bought a basic one that just ran the pump with no power checking. A risk but I was fed up with the tinkering.

Tuesday and the linemen were back again and working quickly they were finished by Wednesday evening. I have an important (politically speaking) neighbour who could not possibly be inconvenienced. That morning I’d been to the local ZESA office to see what I could do about getting the transformer connected and was fully prepared to pay an “incentive”. I was brushed off with “we will get to you”. The next morning they were working on the transformer but it was not by my efforts. My landlord’s son had made contact with the “correct” person and paid him $100. The next day we were finally back on the grid and the generator could take a rest having used some 200 litres of diesel. One phase was not working but we’d become adept at moving wires on the switchboard to deal with that sort of inconvenience.

It had taken 10 days to get the power back and I’d learned a lot more than I’d ever intended to about electrical wiring. I’d only got one shock and no equipment had burned out. One has to be adaptable to farm in Zimbabwe.

 


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The drought of ’92

10 12 2015
Watsomba area of eastern Zimbabwe 1992

Watsomba area of eastern Zimbabwe 1992

Zimbabweans have a curious attitude to the rainy season; they almost think it’s a right and are somewhat puzzled or even hurt when I say no, I don’t think the rains are going to come this year. Of course we will get some rain but it’s almost certain there will be a drought.

In 1992 we had a drought. At the time I was working in Penhalonga in the high rainfall eastern area of Zimbabwe. I was doing freelance programming; there was plenty of work but it did not pay well as people were not convinced of the value of it so I left and in 1995 (another drought year) started an agricultural job near Harare.

The photo above was taken north of Mutare in a high rainfall area called Watsomba. I don’t recall the actual date but you can see there is hardly a blade of grass to  be seen. In those days Zimbabwe still had a vibrant agricultural sector and despite the ravages of the drought nobody went hungry because the commercial farmers (mostly white) knew how to use their resources well and besides, drought is endemic to southern Africa so there was plenty of stored water to irrigate crops.

This year a drought is likely but there’s a major difference; there are very few capable farmers left. Most were driven off their land by the Mugabe government in 2000 – 2002. Many of the former commercial farms lie derelict and ironically, the dams (reservoirs) that ensured plentiful crops and established Zimbabwe as a regional food exporter are still mostly full. There are two reasons for this – there are few farmers to use the water and those who can prefer to pump the water for more profitable crops than the staple maize. Pumping is also expensive these days as most of the country is enduring long power cuts so diesel pumps have to be used. One of my customers told me that he gets up at midnight, when the power comes on, to irrigate his tomatoes. “You can get quite a lot of irrigation done in four hours before they turn it off again but the labour force is not very keen” he added.

The electricity situation is only going to get worse. Lake Kariba, which normally supplies most of the country’s hydro power is critically low so the turbines are running below capacity. The lake is low due to poor rains in the catchment area of central west Zambia and eastern Angola and this inflow only occurs around April. The Zambians have also over developed the north bank power station and the lake simply cannot keep up. Zimbabwe also has a large thermal power station at Hwange in the west of the country but generating capacity is down due to lack of maintenance and capital development (the government is broke) and despite being right on top of a large very high quality coal deposit they just can’t seem to get it together.

Money was borrowed from Namibia to fund electricity development in Zimbabwe but now the local utility, ZESA, has taken out another loan and we have to export more power to Namibia to pay it back.

The internet did not exist in Zimbabwe in 1992 so there was not a lot of opportunity to research the causes of drought. Now the current el Niño is well covered both locally and worldwide. Looking back at the history, this year’s temperature rise that defines the phenomenon looks to be very similar to that of 1992 (1995 was not quite as strong though we were saved in this part of the country by cyclone Bonita that savaged the eastern districts) but perhaps a bit stronger. That’s not good news at all.

I don’t have a photo of the same area taken in 1993 but I do recall that the area recovered very well. That’s cold comfort right now (it’s blazing hot as I write this with temperatures in the mid 30 degrees and few clouds to be seen) as we still have to get through another 12 months before we can hope for a normal season.

In the meantime I am installing a solar powered system capable of running all electrics in the house bar the water heaters (it’s not my house otherwise I’d install solar water heaters too).  I actually am connected to a reasonably reliable grid due to the proximity of a military baracks but I just like the idea of being independent and, yes, I’m a bit of a geek too.


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Categories : Environment, News & Various, Social commentary