Solar-powered systems typically move water over an extended period of time and are able to operate autonomously in most cases. This can help reduce the pressure on boreholes by spreading yield throughout the day. 

The tank storage capacity of such systems can also help provide an important buffer, allowing spare water to be used during peak demand times, at night or during periods of intense cloud cover. These solar-powered systems have close to zero running costs, unlike motorised pumps, which are also noisy, polluting (emitting greenhouse gases which contribute to climate change) and are highly susceptible to fluctuating fuel prices. 

Even though the initial investment for solar powered systems are still slightly higher than for motorised systems, solar-powered systems are becoming more competitive in price where strong market competition exists. Also, because of their durability and low running costs, they are considered cost-effective in the long-term.

Around 663 million people globally still lack access to safe water, despite the Millennium Development Goal (MDG) target for water being met.

Even when improved drinking water sources exist, ensuring safe and sustained water services remains a challenge. Water points can regularly break down and services are often unreliable, creating major barriers to access.

Reasons for this can include a lack of local capacity, particularly in terms of repair and maintenance, land degradation and pollution.

Nakiso Borehole Drilling Scales Up Solar Powered Water Supply Systems!

Such challenges mean that the water sectors have been left with significant unfinished business.

The new Sustainable Development Goal (SDG) on water and sanitation agenda is more ambitious and aims to ensure that everyone has access to a safe and reliable source of drinking water at home by 2030 (SDG 6.1).

Countries are expected to progressively move up the drinking water ladder, ensuring communities have access to safer and more reliable services. In most areas, groundwater remains the most viable and safe source of water and will continue to play a key role in meeting the SDG for water supply.

In order to achieve the ambitious task of universal safe water access, UNICEF is continuing to explore new and innovative solutions which are affordable, scalable, environmentally sustainable and climate-smart.

Solar-powered water systems have the potential to meet all of these criteria, providing higher quality services to multiple homes and even villages through the use of small piped water schemes.

Did You Know That: The assessment found that when correctly sited and dimensioned, solar-powered water systems are a sustainable and effective method of providing safe water to communities.