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SatanLifeProTips t1_iyspmti wrote

Reply to comment by reboot_the_world in Solar energy in Europe will be 10 times cheaper than gas by 2030 by EnergyTransitionNews

The WARRANTY on modern PV panels is 25 years. The projected lifespan of those panels is closer to 50 years. You’ll probably be replacing the inverters every 20 years. Longer if modern inverters use better quality caps.

The panels may drop in production a little bit. You’ll get 80% or the original capacity after a 3-4 decades. So size the system a little bigger than you need.

Batteries are also dropping in price rapidly so that is a tough one to judge. Modern LFP batteries are rated for 4000+ cycles. Sodium ion just became commercially available at $100/kWh and 4500 cycle rating. If you design your battery to only use half of it’s capacity any day those are 20-25 year batteries. They are claiming the gen 2 sodium batteries may hit 10,000 cycles at $50-$75/kWh within 3-4 years. Those will be 30 year batteries by the sounds of it.

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reboot_the_world t1_iyss7lq wrote

>So size the system a little bigger than you need.

How do you do this, if you already used your whole roof?

Like i told you, the prime cost in northern germany for PV are around 12cent where i live. This was before the war. Now it should be around 15 cent.

Here is a study from one of THE research institutes in germany (sorry, only in german): https://www.ise.fraunhofer.de/de/veroeffentlichungen/studien/studie-stromgestehungskosten-erneuerbare-energien.html

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SatanLifeProTips t1_iyt1g2e wrote

Invest in energy efficiency if you are out of roof space. You can spend money on anything from better appliances to insulation to reduce consumption.

Or simply rely on your grid tie to make up the surplus. If you only meet 80% of your energy needs…. Well that is fine. You reduced your power bill by 80%. Stop worrying about 100% solutions.

As for expensive prices right now, ever hear about the chip shortage? China fucked up hard between covid lockdowns and the complete collapse of their power grid this year. The answer is patience, grasshopper. We’ll get back into a PV equipment price falling price cycle quickly enough. EVERYTHING is overpriced and expensive right now. All the forecasts are for the chip market to shift from famine to feast (glut) within 6-18 months. It is a 3+ year cycle for industry to ramp up and we are over half way there.

You’ll also probably see all sorts of rebate programs come and go. The governments of the world are offering all sorts of subsidies. Milk one.

You can also put a PV system on your garage, shed or even in the yard. We have a 3kW system on the old bus that we use as our RV and I am wiring a new breakout plug in my shop so that when the bus is plugged into shore power it will heat and cool my shop.

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