Vondex Colour Band
Vondex logo
Articles Home
Home > FAQs
What is a solar system?
A solar system consists of a solar panel, charge controller, batteries and an inverter.
 - SOLAR PANELS are the core of the system and are manufactured from silicon and convert the sun’s energy to electrical energy.
- CHARGE CONTROLLERS are the nerves of the system and they control and monitor the function of the system and protect batteries from overcharge and discharge.
- BATTERIES store up all the electrical energy as DC and can be converted to AC power.
- INVERTERS convert DC power from the batteries to AC power for electrical use.

What is the life span of the solar system?
For the solar panels, the expected life is about 25years and the batteries can last up to 5years and inverters should last for as long as the system is running if they are not overloaded during use.

What size solar system do I need?
Every home and business is different, so the size of your system will depend on your energy needs, roof space and solar goals. Vondex Solar will custom design a solar power system to meet your specific needs.

What is the difference between pressure and non-pressure geysers?
The pressure geyser requires pressured water coming into the tank for water to come out of the geyser and can be placed on the ground or at the rooftop whiLst the non-pressure geyser does not rely on pressure and works with gravity feed and should ideally be placed on the top of the roof.

What happens to the water in my geyser if it is a cloudy day, will it still be hot?

The water will not reach boiling point as it would on a hot sunny day, therefore it is advisable to put an electrical back up on the geyser. This back up comes as an element and control box and powers up when the temperature drops to a certain level. The back-up can also be used to heat up water for the morning baths if it has been used up at night.

Is it possible run my stove and iron on solar?
It is possible but not economically viable. All electrical appliances that require heating elements such as stoves, kettles, electric geysers and irons require a lot of power and therefore are too expensive to run on solar and/or may end up tripping the system.

Is it possible to run my AC fridge on solar?
It is possible to run an AC fridge on solar but the cost of the solar system to run it actually surpasses the cost of buying a complete DC fridge unit. It is therefore more economical to buy a DC fridge or alternately change your AC fridge to DC if intending to run the fridge on solar.

What is the difference between backup, off-grid and hybrid solar system?

Back up is when Zesa is used to charge the batteries using the inverter, off-grid is where solar panels are used to charge the batteries and hybrid is where both Zesa and solar panels are used and solar panels kick in when voltage from Zesa is low or when there is no electricity.

Why is solar expensive?
The initial cost of solar is expensive but due to the saving on electricity, a system can pay for itself after about 5-9 years depending on the size of the system. After this number of years you would have saved an amount that equals the purchase price of the system.

What are the advantages of using solar?

It is renewable, clean and free of emissions. There are low maintenance costs as there are no moving parts. After the initial capital outlay the power is free and maintenance costs are very low.