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I want to buy my first solar panel and I have some questions
Alexander12 posted a topic in Solar Power,
Hello guys, I am a Swiss highschool student and I would like to buy a solar panel 100W, 12v.
I am very curious about this field and I really would like to use in the future 100% renewable energy.😊<br style="background-color:#fefefe;color:#000000;font-size:15px;"><br style="background-color:#fefefe;color:#000000;font-size:15px;">So I need to go step by step and my first step is to buy a 100W/ 12v solar panel to can charge my laptop and my phone.So this solar panel is enough to charge a laptop right?
Here are my other questions:
For a 100W, 12V solar panel, do we need a charge regulator, a 12V battery, as well as a 300W voltage converter, from 12V to 230V (for example), to be able to charge a laptop ?
If the solar panel produces less than 12V due to little sunlight, does the battery not store anything anymore because it is a 12V battery or can it still store? If it does not store, that would mean in this case, that I should take a battery with a lower voltage such as 6V for example? Can it then store enough energy or is it “full” very quickly?
In this case, would that mean that the charge regulator and the voltage converter must also be able to accept 6V? How can I mesure the voltage of a battery?
How long does it take ~ for a 12v battery to be fully full without using it at all?
<br style="background-color:#fefefe;color:#000000;font-size:15px;">Also, I am not sure I understood everything about the inverter, which kind of inverter should I use for a 100W/ 12v solar panel? (I prefer the inverter than the DC power supply because it seems easier). Can it be like that if I want to charge my laptop? (Sorry it is written in french...)<br style="background-color:#fefefe;color:#000000;font-size:15px;"><br style="background-color:#fefefe;color:#000000;font-size:15px;"><br style="background-color:#fefefe;color:#000000;font-size:15px;">Also, so for the battery I have better to choose a 6v battery for my solar panel like this one?<br style="background-color:#fefefe;color:#000000;font-size:15px;"><br style="background-color:#fefefe;color:#000000;font-size:15px;">Or it isn't a good idea?<br style="background-color:#fefefe;color:#000000;font-size:15px;">( I would like an inverter and a battery cheap but which work quite well even if they are not expensive, if it is possible)
Last question: How do you link several batteries together?
These are my main questions and I apologize for bothering you with them.
Have a nice day!🙂-
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- 26 replies
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How deep do you draw your lithiums?
Hagu13 posted a topic in Batteries,
I'm new to lithiums after recently replacing my lead acids. I have 2 x 3.5kW Pylontechs.
I'm looking for the sweet spot where I will get good battery life as well as maximum utilisation of the bank at night. I do understand the technology is new so there's no real data out there.
Currently I'm drawing down to 25% before switching to grid, but the Axpert powers itself from the batteries so this causes a further slow drop of a few %. Never goes below 20% which is my personal comfort zone limit. I'll likely modify this strategy for load shedding to leave a little more in should I need to go back to battery at 4am.
What's the feeling on this? Am I cycling too deep, or not maximising ROI?-
- 17 replies
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Starting out
PhilFM posted a topic in Starting In Solar? Feel free to introduce yourself,
I am new here, been building up my system for some time now.
Started with the following a bit more than a year ago purely for loadshedding backup. System started as follows:
1. Axpert 5KVA (Mecer)
2. 4 x Vision 200ah AGM's
After a year I started having problems with the batteries and decided to upgrade to Pylontech and also at the same time bit the bullet and ordered the panels to start producing own power. Connecting the Pylontech's to the Axpert I realized that communication between batteries and inverter was not going to work, so also ordered the Raspberry PI with ICC software
System currently as follows:
1. Axpert 5KVA (Mecer)
2. 2 x Pylontech US3000
3. 6 x Canadian Solar 365W Poly KuMax
4. Raspberry PI with ICC software
Will be adding two more Pylontech US3000's (for total battery backup of 14 Kwh) as well as 6 more 365W panels in the next month or two
I will probably be asking a lot of questions as I have been lurking these forums as a guest for a long time looking for answers to all of life's power questions
Attached a few photos of my setup-
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- 12 replies
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Sunsynk 8kw Inverter
Leshen posted a topic in Member Installations Showcase,
Hi Guys. My new installation. 24 x 390w JA Mono solar panels with an 8kw Sunsynk inverter and 2 x 5kwh Bull Lithium batteries. More pics to follow soon...-
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- 55 replies
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Interview – Keith Gough on Sunsynk and its future in South Africa.
Backbone Energy posted a topic in Backbone Energy,
In this video we asked Keith several questions about Sunsynk and its role in South Africa. Keith is based in China and sent us an excellent and informative video to our request. This video interview offers you a strong insight into Keith’s thinking, design philosophy and the journey he took to create Sunsynk and its development.
Key Takeaways
Kieth is a certified Electrical Engineer
Sunsynk started in marine outfitting mainstream shipping and yachts.
South Africa is marked as a major market
Sunsynk is over 10 years old
Sunsynk is developing large scale inverters up to 100kw with imbalance modes
Parallel up to 15 Sunsynks together-
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- 0 replies
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Sorry for the incomplete information. The array is small, it's 1000W (5S/2P) of 10 100W 36Cell panels rated at <12A Isc in total for the 2P combination. The Battery DC breaker is 40A as the MPPT is a 150/35. I've only shown the PV breaker for illustrative purposes to indicate the polarity markings. My concerns was that magnetic direction with the two conflicting sets of information from NOARK. -
By Chris Hobson · Posted
Morning you need to be careful wiring up DC breakers so that the magnetic field directs the DC spark into the catch cage. If the source is your PV you can bring the wire into the CB either at the top or at the bottom like an isolator but then you must be consistent and ignore the + and - on the other side. Your current flow between MPPT and battery is usually bi-directional and DC circuit breakers are not designed for bi-directional use. The Amps you are going to draw from your battery is could exceed what a DC breaker is able to switch. So I would recommend you have a DC breaker between PV and MPPT and a battery disconnect between battery and MPPT. You don't mention what size you PV array is and whether the array is made up of several strings or the size of your inverter. So my recommendation is made with incomplete facts. https://www.youtube.com/watch?v=Cup5fMGaE2g -
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By phoenix752 · Posted
kkkkk yeah. So where are the other solar dealers getting the Omnipower batteries, are they getting them from Sinetech? If so why some of them sell the batteries at a cheaper price than sinetech like R300 less or so. Is there anyone to testify on their battery endurance, because the specs sheet indicates a cycle life of 4200 @ 20% DOD. That's more than 10 years kkkk. I think there is need for a user review here. Something is no t adding up -
I got myself two NOARK Ex9BP-JX DC 2P MCB's for some rewiring over the December time period. I just want to confirm that I can use these between my Panels and MPPT PV Input and between my MPPT Battery Output and Battery. The MPPT is 150V. This diagram shows the 2P wiring. Can I safely use it like that? I've seen DC MCB's wired incorrectly on youtube and don't want to become a statistic. and Other NOARK documentation has the + and - swapped around like below: My breaker looks like this:
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