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Likely increase in performance of your cable compared to a cable with the least favourable choices for all the parameters. Performance is an indicator of both qualitative aspects such as reliability and quantitative aspects such as generation.
The benchmark generation is the generation of the solar cable with the least favourable choices for all the parameters.
The benchmark cost is the cost of the solar cable with the least favourable choices for all the parameters.
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Cables

The electricity transfer medium

Cables used in solar power generation are slightly different from the conventional electric cables. Solar cables are designed to withstand long-term exposure to sunlight. The following are the key parameters you should use to select the right cable.

Performance of Your Cable

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Likely Increase in Generation Over Benchmark
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Likely Cost Increase of Cable Over Benchmark

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Parameter Choice Likelihood of Performance Increase Likelihood of Cost Increase
Parameter Choice Likelihood of Performance Increase Likelihood of Cost Increase
1. What is the type of conductor used?

The convention is to use copper on the DC side and aluminium on the AC side

.Cable management is a critical factor and plant outages can occur because of cable breakdowns.
.Copper is always suggested on the DC side to minimise losses.
.Aluminium is usually used on AC side or from the string monitoring boxes to cut costs.
Check the Bill of Materials for this, or check with your vendor

2. What is the type of insulation material used for the cables?

XLPO is preferred than normal PVC insulation for DC cables.For AC cables, XLPE is suitable.

.The cable's insulation must not only be able to decrease the losses, but also be able to withstand thermal and mechanical loads.
.XLPO/XLPE is a better insulation material than normal PVC in terms of durability and resistance to harsh conditions.
Data available in the datasheet

3. Is the DC cable UV and weather resistant?

UV and weather resistant ensures the durability of the cables under harsh outside conditions.

.Since cables are exposed to UV radiation and harsh weather conditions, it is critical that they are resistant to UV radiation and weather.
. If the cables are not UV resistant, pass them through conduits so that the cables are not exposed to direct sunlight.
Data available in the datasheet

4. What is the upper limit of the temperature range of the DC cable?

The upper limit of around 120 degree C should be ensured.

Cables are usually secured to the mounting frames/support rails which are typically at a higher temperature than the ambient and leads to increased cable operating temperature. So the operating temperature limit should be around 120 degree C after considering a derating factor to ensure that the cables do not deteriorate under severe temperatures.
Data is available in the datasheet

5. What type of cross-linked polymer is used in the insulation material of the DC cable?

Polymers with electron-beam cross linking is found to be more durable.

Polymers which have been cross-linked using an electron beam can be more durable and can remain elastic and soft for a longer period than the other.
Data is available in the datasheet


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