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One of the most important factor that you must know before buying an inverter is your “Power requirement”. In simple words- what all electrical appliances (like fan, tube lights, television, CFL etc.) you want to run at the time of power failure. The power requirement is addition of the power consumed by various electrical equipments. Typically, home inverters range from R2,500 to R25,000 in price. The price of a solar inverter is relatively higher than a standard one due to its advanced technology and additional features.
Battery is the backbone of an inverter system. The performance and life of an inverter largely depend upon the battery quality. The next big question is “how much back up will an inverter provide?” or for “how many hours it can run all of your equipments?”. This is what is called the battery capacity. It is the battery capacity that decides the back up hours. It is expressed in Ah (Ampere Hours).
In the market batteries with capacity of 100 Ah,150 Ah, 180 Ah etc. are readily available. So how to decide which one do you need? To find this out lets do a reverse calculation. Consider that you need a battery that provides back up for 3 hours.
As the power requirements are on the rise, so are the solutions, like high frequency inverters or string inverters, which are customizable and are capable of delivering stable results under stress conditions. These high frequency inverters have amazing capabilities with lead acid batteries and Lithium ion batteries alike. Further more the high frequency inverters are light weight and hence can be mounted on walls, and more importantly are IoT based which makes them smart and efficient. These high frequency inverters are best use case for large to very large solutions like bigger homes or commercial locations.
The tables below compare the prices of reputable hybrid off-grid and hybrid on-grid inverters in South Africa.
Prices were taken from well-known online stores dealing in energy equipment, including GeeWiz and Solarway Suppliers.
Hybrid off-grid inverters | |||
Inverter | Maximum output | Price | Price per kW |
Geewiz Axpert 24V | 3kW | R6,495 | R2,165 |
Growatt 3kW 24V | 3kW | R7,299 | R2,433 |
Mecer Axpert 3kW 24V | 3kW | R7,495 | R2,498 |
RCT Axpert 3kW | 3kW | R7,859 | R2,620 |
Mecer Axpert 5kW 48V | 5kW | R10,348 | R2,070 |
Growatt 5kW 48V | 5kW | R12,899 | R2,580 |
Luxpower 5kW 48V | 5kW | R14,995 | R2,999 |
Mecer Axpert 5.6kW 48V | 5kW | R14,995 | R2,999 |
Mecer Axpert 8kW 48V | 8kW | R21,125 | R2,641 |
RCT Axpert 8kW 48V | 8kW | R25,731 | R3,216 |
Hybrid on-grid inverters | |||
Inverter | Maximum output | Price | Price per kW |
Deye 3.6kW 48V | 3.6kW | R15,999 | R4,444 |
Victron Energy 3kW 24V | 3kW | R16,930 | R5,643 |
Victron Energy 3kW 48V | 3kW | R17,894 | R5,964 |
Sunsynk 3.6kW 48V | 3.6kW | R21,895 | R6,081 |
Deye 5kW 48V | 5kW | R24,899 | R4,980 |
Victron Energy 5kW 48V | 5kW | R27,193 | R5,439 |
Sunsynk 5kW 48V | 5kW | R27,995 | R5,599 |
Deye 8kW 48V | 8kW | R39,500 | R4,938 |
Sunsynk 8kW 48V | 8kW | R40,825 | R5,103 |
Victron Energy 8kW 48V | 8kW | R48,516 | R6,065 |