A Grid Tie system is connected to your network for example Eskom and does not need any batteries. This system shuts down when Eskom shuts down during loadshedding for example. This system is typically used by clients with a high daily usage for example factories and workshops operating from 7am to 5pm. Some clients install this at their homes or guetshouses to halve their monthly bill, but in the evenings they will revert back to Eskom.
If your daily usage is high, then this system is for you. Grid Tie systems have a long life span because they don’t require the use of batteries.
An Off Grid system is independent from Eskom and is typically installed in areas where there are no electricity or where they want to discontinue using Eskom as a service provider. This system is dependent on batteries, for example Li-ion, Gel, Lead Acid batteries. Every battery has a different life span or cycles and varies in float and equalise values and should be installed by qualified solar power installers, as this can drastically influence their lifespan. The costs of batteries are expensive and therefore needs to be calculated and installed correctly.
Sometimes confused for an Off Grid system, the fact remains that this system combines an Off Grid and Grid Tie system in to one. This system works with Eskom, but also delivers electricity in the evenings when there is load-shedding. A hybrid inverter either works with batteries or panels or both. Due to its flexibility, this system is more expensive than other systems, but saves more on your monthly bill and gives assurance of power availability, even if Eskom is down. If your installer tells you the system he quoted you on, is a hybrid system, then you you should insure that it can also function without batteries. You will then know you have the correct inverter.
Solar or AC 220V or 380V
These pumps are used in boreholes to extract water. You can use a DC pump, one that only works on solar panels, or pumps working from the Eskom grid / connection. They can run on a 220V or 3-Phase system. You get two types of submersible pumps, mono pumps and centrifugal pumps.
A submersible pump (or sub pump, electric submersible pump (ESP)) is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped. The main advantage of this type of pump is that it prevents pump cavitation, a problem associated with a high elevation difference between pump and the fluid surface.
CONVERTING AC PUMP TO SOLAR
A new technology allowing you to convert your current system to solar for use during the day.
The benefit of this system is that your replacement cost of the pump is significantly lower than a normal pump and your saving is 100% of your current daily usage.
These pumps are typically used in rivers, dams or pivot irrigation spots. It is very popular for use with boreholes. VSD inverters are typically used for the conversion and their price makes it an affordable option to use. There is a VSD inverter which can be used for every pump.
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