Kinetic energy from the sun
Buy solar panels Amazon
is a self-help site
Cost to operate water heater Figure Volts Amps Watts for water heater How to wire tankless electric
How to install point of use water heater Point of use water heater
How to install gas water heater How to install electric water heater
How to install and troubleshoot garbage disposal garbage disposal
How to maintain water heater Compare 16 ways to control water heater
Compare 16 electric and 3 gas water heater timers Troubleshoot Rheem tankless Clean sediment out of water heater 9 ways to save with water heater
How to install recirculation system Point of use water heater
How electric water heater works Troubleshoot electric water heater Troubleshoot gas water heater Leaking water heater
Type 1 and type 2 surge protection surge protection
Search / all results
Search using Find button  

 Tweet button  

Is solar Thermal Dead?

Dave responds to solar water heater article
Heat pump water heater review

Written almost 3!!! years ago.  When PV was like 4.50$/watt! .... LOL!

    Article says: Unlike a PV system, most solar thermal systems have moving parts (pumps and solenoid valves).
Dave says: Well yes!

    Article says: In freezing climates, solar thermal systems are sometimes subject to freeze damage.
Dave says: OK yes 

    Article says: Solar thermal systems require regular maintenance, including antifreeze replacement.
Dave says:: Um I guess so.

    Article says: Unlike owners of a grid-connected PV system, who can be credited for their excess electricity production during the summer, owners of a solar thermal system can't sell the excess summer production of their hot water systems.
Dave says: I don't care about grid tie.

    Article says: While a pole-mounted PV array can include a tracking mechanism to follow the sun's path across the sky, it's virtually impossible to install solar thermal collectors on a tracker.

Dave says:: LOL ... trackers of any kind are road kill. Dead Dead Dead.
I knew that 7 years ago.  What is dude thinking?

    Article says: On average, PV systems probably last longer than solar thermal systems.
Dave says: Not just yes but YES.

Dave reviews heat pump water heater:... article goes on about heat pump water heaters. ... sorry but with PV below a buck a watt you need an AC inverter to feed mr heat pump thingy.  Instead of buying a reliable 3600 watt inverter for $1700 why not just buy 2000 watts more PV?

Mr heat pump gonna be working in 10? 15? 20? years with no maint? NO.
Wouldn't it be weird if super cheap PV killed heat pump water heaters (AC powered)??? 

Wouldn't it be weird if everyone just bought PV panels and stuck them out on their lawn or some such?
  Im game for a DC powered heat pump water heater if someone builds me a nice garage to stick it in. ... second thought... nah. It will block my view.

So I’ll list a few exceptions to my new rule:

    Article says: Solar thermal systems still make sense for off-grid homes.
Dave says: No ... sorry they still don't.  Not now.

    Article says: If you can get a two-collector solar thermal system installed for $5,000 or less — an attainable price in areas of the country where people don't have to worry about freeze protection — it may make sense to install one.
Dave says: No.  They are still a pain in the ass.

    Article says: In a sunny, warm climate, where a solar hot water system will have a higher solar fraction than 63%, an investment in a solar thermal system makes more sense than it does in Wisconsin or Massachusetts. (On the other hand, a PV system produces more electricity in a sunny climate, too.)
Dave says: Needs to recalculate that with PV at 1/5th the cost now.

    Article says: If you are skeptical about the longevity of heat-pump water heaters, you may prefer to wait a few years before buying one, and to stick with a solar thermal system in the meantime.
Dave says: Actually good advice to wait.  But better to heat water with propane cylinders for 3 years until PV is under a buck   ;-)  hindsight being what it is and all that.

DC solar water heater

DC solar water heater

Connect ordinary electric water directly to solar power.

DC solar water heater wiring options
DC safety switches
DC relays for solar

Basic household wiring
Basic water heater circuit

Figure volts amps watts for electric water heater
Test elements
Replace elements
How to wire tankless electric
How to change water heater temperature using timer
Change water heater from 240Volt to 120Volt
Replace thermostats
How to wire thermostats
How to wire water heater for off peak operation

How to twist wire
How to wire Cooper 277 pilot light switch
How to wire combo switch-outlet
How to replace 3-speed fan switch

How to wire dimmer
How to wire 3-way dimmer
How to wire occupancy switch
How to wire motion detector
How to wire TM811 and TM8111 switches
How to wire wall timers
How to wire box timers
How to wire off-delay timer
Wire off-delay timer
How to wire pin timers

How to wire and troubleshoot photo eyes
Reverse photoeye so it turns on in day
24 Volt photoeye
24 volt programmable timer

How to wire switches
How to add switch
How to add 3-way switch

Timer for 3-way switch
Timer for 4-way switch

How to add outlet 
How to wire 3-way switches
How to wire 4-way switches

Troubleshoot Malibu outdoor lights
Select and install wire connectors
Select wire size

Electrical formulas
Electricians forum

Electrical pages

How to wire arc fault breaker
How to wire GFCI
How to wire GFCI combo

Basic water heater circuit
How to wire water heater for 120Volt
Install old work box

How to drop wire from attic
Wire connector

How to wire 240volt outlets
How to install 3-phase timer
How to wire 3-phase outlets
How to wire 3-phase surge protector
What is 3-phase

How to wire whole house surge protector
How to wire under-counter water heater

See inside main breaker box
Replace breaker
Install subpanel

How to solder wires
Whole house surge protector
3-phase surge protection
Circuit breakers

Difference between 120 volt and 240 Volt
Difference between 50Hz and 60Hz
How to install electric meter on water heater
How to wire water heater thermostat
How to wire water heater with switches and timers

6x6x4 Enclosures
Intermatic timer enclosures

Convert AC water heater to DC
How to wire DC solar water heater
DC relays for solar water heater
How to add another thermostat to water heater

How many Kwh to heat water
Chart for figuring heating time for electric heater

Gas and electric water heaters Industrial electric at Amazon

Industrial supplies at Amazon

Industrial and scientific Amazon
Shop Amazon - DEWALT
Shop Amazon - Black and Decker
Shop Amazon - Stanley Tools
Shop Amazon - SKIL Tools
Shop Amazon - Porter-Cable Tools
Shop Amazon - Bosch Tools
Shop Amazon saws and saw blades
box timers Compare box timers

Control water heater w/ Z-wave
Intermatic control centers Control centers:
+ manuals and parts

All control centers and parts

Including Z-wave
programmable timer Compare programmable timers

Control water heater with programmable wall timer
Countdown timers Compare countdown timers

Control water heater with countdown timer
Low voltage power packs Low voltage transformers

My response might end up in spam folder, check email folders
Site map
Follow newest idea on twitter
Privacy policy
Back to top