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1answer
36 views

No hot water even if heating elements work (solar/boiler combination)

I've got following setup for heating water: boiler solar panel on the roof The overall setup is simple - the cold water enters the system and goes first through the solar panel and then through ...
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2answers
58 views

What factors should I experiment with to improve the performance of a DIY solar hot water system?

Background: Late in the summer last year I finally commissioned a DIY solar hot water pre-heat project. Very simple, drain back, open (vented) tank, PEX coil for a heat exchanger, PEX plumbing ...
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1answer
162 views

Is it possible to make a heliostat with no moving parts?

I want to place a couple of mirrors outside the house to direct some sunlight to the windows, which will make it easier to cope with the soul-crushing overcast winters here in Melbourne, Australia. ...
7
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3answers
385 views

What's a reasonable expectation for efficiency in modern solar panels?

I recently had a solar array installed on my roof with four different sections connected to three inverters - the total array includes 56 panels for a total of 13.44 kW. However, I'm not seeing ...
2
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2answers
276 views

Where does the excess electricity from my solar panels go?

When my excess electricity goes back into the grid, where does it go after it has passed through my meter? Does it go to the next closest house needing power?
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1answer
56 views

Where can I find good resources on solar thermal backup options?

The 'what if the sun don't shine' problem is the difficult issue in solar thermal. Where can I find good solid test-based resources on the options for backup and their downsides? For example: ...