MC4 extension cable (pair)

Q: Do I consume all the electricity my kit produces?

In short: probably most of the time, yes.Your solar kit’s production of electricity is almost never the exact same as the consumption of your household. If you consume more than you produce, then 100% of your production is used on the spot, maximizing the economic profitability of your kit as you take full advantage of the savings.If you produce more than you consume, you have several options:Feed the surplus energy into the power grid. In Spain you can certify your kit with us, and get compensated for your surplus by your power company.Add storage with a smart meter, and store all excess energy during sunshine hours, to use it when the sun doesn't shine.Install a “zero discharge” device or “smart meter” on your distribution panel, that lowers your kit’s production and avoids any spillover of excess electricity to the power grid. This is the least attractive option, since you incur the cost of the smart meter and installation, and get no benefit from it.If you feed a lot of energy to the power network, for example because you’re not at home during the day or use your home only sporadically, a storage system is probably the smartest solution. Most storage systems are modular, so you can start small and upgrade as you see the need for it.

Q: Does a solar kit produce peak output all day long?

In short: no.Your solar kit produces electricity depending on the varying amount of sunshine your solar panels are exposed to. Starting from zero at night, during the morning solar production increases and peaks at around noon, only to slowly decrease again until the sun goes down in the evening. Your kit’s energy production curve follows the same bell curve pattern.Keep in mind that any solar panel’s power output is measured in Wp (Watt peak), a theoretical measurement unit that indicates the maximum (peak) output of a panel under perfect testing conditions. In real life these conditions can be met just for a limited amount of time in ideal conditions (south facing, 30 degrees installation).Customers in Southern Europe, where during large parts of the year sunshine hours are very long, see our Premium solar panels produce solar power at or slightly above Wp levels for hours in summer. Investing in quality solar panels is likely to maximize your yield and savings over many decades.Check our Savings Calculator to see how much you can save with a solar kit in your home.

Q: How do plugin solar kits work?

In short: much easier than you might think.A plugin solar kit generates electricity from the sun with solar panels. The micro inverter converts the panels’ DC power into AC power used in your household. A special cable connects the micro inverter to a normal Schuko plug in your home, feeding your kit’s power into your household’s power circuit.That circuit is like a system of canals. At different points there are devices that consume energy (your fridge, lamps and other devices). The sum of that energy consumption is what at the end of the canal is fed from your power company into your household. Your power meter counts how much that power is at any time.If you now connect a plugin solar kit to your canal, that kit feeds solar power into the network. Due to a slightly higher voltage, your devices use your solar power first. If you have several power circuits at home, these all meet at the distribution panel, which in turn is connected to your power meter and the grid. If there is excess power in the circuit your kit is connected to, it will spill over first to your other circuits that are demanding energy.Beware that this only works in a single phase home network. If your network is triphase, a kit works in one phase only. You can connect different solar kits to each of your three phases.Check out our explanation video on how this circuit works.

Robinsun

€19,00

MC4 extension cable to connect solar panels and micro inverters:

This set contains two MC4 extension cables
Designed to extend the cables of your solar panel
Use these cables for example if you want to install the micro inverter further away from the solar panel, or if you connect more than one panel to it
The cables have MC4 connectors, each equipped with + and -
TÜV-certified and made with PV1-F cable for solar applications

Length:

1 m 2 m 3 m 5 m

Variant

MC4 extension cable (pair)

€19,00

Plugin solar kit Installations of Robinsun customers

Savings Calculator

Estimate your production and yearly savings

Savings per year: €0

CO₂ saved: 0 kg

Electricity generated: 0 kWh

Number of panels Panel type (Wp) Panel tilt angle (°) Electricity price (€/kWh) Orientation

What our customers say about us

Daniel

Excellent service

The entire process went smoothly. The website is simple and effective. The payment process was transparent and seamless. The shipment was on time, although the carrier split it into two packages with only one tracking number, which caused some confusion for me, but this was quickly clarified by Robinsun's customer service.

Nov 11, 2025

Performance 400

Rafael

Excellent customer service

Excellent customer service, fast shipping and quality product at a good price.

Nov 11, 2025

Marstek Venus E 3.0 - 5.12 kWh

Jose Antonio Granero Miralles

Everything perfect

The personal service over the phone was outstanding. There was a problem with the agency, and they resolved it quickly. I will work with them again and recommend them.

Nov 11, 2025

Performance Basic

Francisco Manuel Gonzalez Mart

Excellent service and customer care

On-time delivery. Utmost professionalism.

Oct 22, 2025

Marstek Venus E 3.0 - 5.12 kWh

Harry O'Connor

Amazing support and great prices

Amazing support and great prices. What's not to like? Really lovely people on WhatsApp helping you with everything. Don't delay, invest in solar!

Oct 19, 2025

Marstek Venus E 3.0 - 5.12 kWh

Benz Kotzen

Delivering to us in Portugal is difficult and despite the difficulties with the Portuguese postal system, the staff at Robinsun were extremely helpful. The plug and play system we ordered was delivered within the set time frame, all pieces present and well packaged and now we are getting the 800 kWh at peak sun as promised.

Sep 13, 2025

Performance Flat

Paul Brabant

Get your equipment here

I only have good things to say about this company. I haven't experienced customer like this in Spain. Reminds me of the best companies in the US, where the customer is king. Super easy installation, quick software install, and up to 1.3kwh with 4 panels. Brilliant.

Aug 14, 2025

Plus 2000

Wies Verstraete

The service of Robinsun is outstanding

The service of Robinsun is outstanding. Although the panels were damaged in the transport (which wasn't their fault), they did everything to send new panels asap. Very easy communication via WhatsApp.

Aug 1, 2025

Performance Flat

Pedro Oliveira

Overall experience was pretty good with a package that made sense, good videos explaining how to set everything up and follow up over whatsapp to confirm everything was going as expected.

May 30, 2025

Performance Flat

IZ0 JUB

5 Star After Sales Service

I would like to thank Boris and his team for swapping out the TSUN storage battery for the ANKER Solarbank through no fault of Robinsun's the manufacturers TSUN admitted there was a problem with their equipment. The Anker is working great and giving us power all through the evening and is usually fully charged at this time of the year just after lunch. Robinsun's after sales service is second to none. 5 stars plus.

Jul 5, 2025

Anker Solarbank E1600

Eduard Frades Fabrega

I bought a basic setup without issues…

I bought a basic setup without issues and I got am excelllent support before buy the product.

May 23, 2025

Performance Basic

Moisés

The experience is very positive, they are giving you support for all the problems that you can suffer, for example, logistic, configuration. To me they are the best.

May 2, 2025

Performance Wall

Luis Gomes

Excelent products and excelent support.

Excellent products and excellent customer support. I bought a solar kit, and from the very first moment, the support via WhatsApp was excellent. Very fast delivery to Portugal without any problems. Everything worked perfectly, and I was very satisfied. I recommend Robinsun and will buy from this company again in the future.

Mar 19, 2025

Performance 800

Marco Mendes

Very good customer service

Very good customer service! Would definitely buy again from Robinsun!

Feb 24, 2025

Performance 400

Celso Vieira

Customer support is great. Instalation was very easy and fast. In no time it was working, producing power and saving the planet. Recommend to all. Good job robinsun!

Dec 13, 2024

Performance Basic

Ulrich S Barcelona

This is a very simple fast and economic way…

...to start producing solar energy by yourself in Spain. Very responsive, and smooth and fast shipment and declaration to the authorities. Very easy to assemble.

Jul 18, 2025

City 800

Paolo Tedone

Excellent customer service

Excellent customer service, fast, reliable.
Product according to description, easier than IKEA to install.
From 10am 100% coverage of baseload needs, when sunny 😉

Sep 6, 2025

Performance Flat

António Olaio

Excellent customer service

Excellent customer service. Always available and with clear and accurate information. Received the order the next day, well before the expected delivery date. 5 well-deserved stars.

Aug 28, 2025

Marstek Saturn C - B2500

Jose Antonio

Friendly service and quality materials

Very fast shipping and everything perfectly packaged. The system's anchors are high quality. The system itself is working correctly. The information and advice provided beforehand were very helpful and accurate.

Sep 9, 2025

Performance 800

Lydia C

Excellent personalized service

The team guided me through the process of choosing my kit; I didn't know anything and they explained everything to me. Highly recommended.

Nov 15, 2025

Marstek Venus E 3.0 - 5.12 kWh

Marc Borràs Conte

Everything was great!

The purchase process went very well. They answered all my questions both before and after the purchase. Excellent!

Sep 18, 2025

City 800

Juan Carlos Alguacil

Professional and friendly supplier

The purchase arrived on the expected date. I had some setup issues that the manufacturer resolved with an update. The after-sales service and customer support were friendly and prompt.

Sep 26, 2025

Marstek Jupiter C Plus

Miguel Angel Pastor Colinas

Excellent service

Excellent service, advice, and now installation follow-up. For the small amount I purchased, they've been very helpful. I hope to expand my installation with them.

Sep 30, 2025

Performance Flat

Mary Aranda

City 800 Pack Highly Recommended

I bought the City 800 pack and it works great. It's easy to install and doesn't require any advanced DIY skills. I recommend it to reduce your home's electricity consumption.

Oct 3, 2025

City 800

Carlos Calado

Excellence

The speed of delivery and the quality of the equipment and support.

Oct 14, 2025

Performance 500

shahed

Excellent Solar Investment and Outstanding Service

Purchasing the solar system has been a great decision. We’ve reduced our electricity bills by over 50% with just four solar panels. The service was very fast, and the advice was equally excellent—they helped us throughout the entire documentation process. We’ll continue buying their products because we find them to be high quality, and their customer service is outstanding

Sep 2, 2025

Plus 2000

Blog posts

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Marstek Venus E 3.0 - Frequently Asked Questions

View all

Product FAQs

Plugin Solar Kits

How much electricity does a plugin solar kit produce?

In short: a Performance 800 plugin solar kit with 2 solar panels produces up to 1.600 kWh/year in southern Europe.

Kits with just 1 panel produce up to 800 kWh/year, kits with 4 panels about 3.200 kWh/year. Total production depends on several factors, like

location
orientation
angle (or azimuth)
the type of kit you choose

Our Savings Calculator helps you find the exact answer for your installation.

When considering the installation of a plugin solar kit, look for the place in your household with the most unimpeded sunshine hours. This can be your terrace or balcony, or a pergola, or a wall. We also have solutions for tile roofs or metal roofs.

How much can I save on my power bill?

In short: depending on your consumption, potentially all of it.

A plugin solar kit produces solar energy for self consumption at home. The energy it produces is used directly by your household appliances. This avoids you having to buy that energy from your power company, lowering your power bills.

Your savings are therefore determined by

how much energy your kit produces
how much you pay your power company per kWh, with all extra costs and taxes included

For example, if your kit produces 1.600 kWh per year and you pay €0,25/kWh to your power company, you save €400 per year (1.600 kWh x €0,25/kWh = €400). You can calculate how much you can save at your home address with our Savings Calculator or check the European Commission’s PV GIS.

How much the savings are on your overall electricity bill depends on how much you consume in total. If your yearly consumption is 1.500 kWh, then you’ll save over 100% of your power consumption. If you use 5.000 kWh, it will be just 32%. The average household in Southern Europe consumes about 3.200 kWh/year, where a kit can save half of it.

In any case, some savings are better than no savings at all. Every kWh you can produce yourself is a kWh you don’t have to buy from the grid, saving you money every day.

Do I consume all the electricity my kit produces?

In short: probably most of the time, yes.

Your solar kit’s production of electricity is almost never the exact same as the consumption of your household. If you consume more than you produce, then 100% of your production is used on the spot, maximizing the economic profitability of your kit as you take full advantage of the savings.

If you produce more than you consume, you have several options:

Feed the surplus energy into the power grid. In Spain you can certify your kit with us, and get compensated for your surplus by your power company.
Add storage with a smart meter, and store all excess energy during sunshine hours, to use it when the sun doesn't shine.
Install a “zero discharge” device or “smart meter” on your distribution panel, that lowers your kit’s production and avoids any spillover of excess electricity to the power grid. This is the least attractive option, since you incur the cost of the smart meter and installation, and get no benefit from it.

If you feed a lot of energy to the power network, for example because you’re not at home during the day or use your home only sporadically, a storage system is probably the smartest solution. Most storage systems are modular, so you can start small and upgrade as you see the need for it.

Does a solar kit produce peak output all day long?

In short: no.

Your solar kit produces electricity depending on the varying amount of sunshine your solar panels are exposed to. Starting from zero at night, during the morning solar production increases and peaks at around noon, only to slowly decrease again until the sun goes down in the evening. Your kit’s energy production curve follows the same bell curve pattern.

Keep in mind that any solar panel’s power output is measured in Wp (Watt peak), a theoretical measurement unit that indicates the maximum (peak) output of a panel under perfect testing conditions. In real life these conditions can be met just for a limited amount of time in ideal conditions (south facing, 30 degrees installation).

Customers in Southern Europe, where during large parts of the year sunshine hours are very long, see our Premium solar panels produce solar power at or slightly above Wp levels for hours in summer. Investing in quality solar panels is likely to maximize your yield and savings over many decades.

Check our Savings Calculator to see how much you can save with a solar kit in your home.

How do plugin solar kits work?

In short: much easier than you might think.

A plugin solar kit generates electricity from the sun with solar panels. The micro inverter converts the panels’ DC power into AC power used in your household. A special cable connects the micro inverter to a normal Schuko plug in your home, feeding your kit’s power into your household’s power circuit.

That circuit is like a system of canals. At different points there are devices that consume energy (your fridge, lamps and other devices). The sum of that energy consumption is what at the end of the canal is fed from your power company into your household. Your power meter counts how much that power is at any time.

If you now connect a plugin solar kit to your canal, that kit feeds solar power into the network. Due to a slightly higher voltage, your devices use your solar power first. If you have several power circuits at home, these all meet at the distribution panel, which in turn is connected to your power meter and the grid. If there is excess power in the circuit your kit is connected to, it will spill over first to your other circuits that are demanding energy.

Beware that this only works in a single phase home network. If your network is triphase, a kit works in one phase only. You can connect different solar kits to each of your three phases.

Check out our explanation video on how this circuit works.

See all FAQs

MC4 extension cable (pair)