Any experiences with the Bosch AE 125 (Electric) Tankless?

[kraemerr]

Electric tankless compare to propane at about $1.00 to $1.25 per gallon depending on your region of the country. Current propane costs run about $2.30 a gallon delivered.

Check out the 32KW SEISCO, its made in Houston Texas and has the most advanced digital power management of any of the electric tankless. Better temperature control and no flickering lights. It also detects flow by temperature, not flow so you can use with preheated water like solar, geothermal or a good old electric tank on a timer to take advantage of time of day rates. It should give you 5 GPM at a 40 degree rise. It also works in HARD WATER without a softener, try that with a gas tankless!

They have an optional "load shed" relay that allows you to control any thermostat controlled load so it doesn't run at the same time as the water heater. This allows the SEISCO to fit on existing electric panels where other electric tankless may not. Its got a 20sec delay and 3 minute cycle time so you can use with cheap A/C units with confidence.

Their service is in Houston, not India or Germany so you can get an English or Spanish speaking rep and parts ship in a day

[Dana]

Electric tankless compare to propane at about $1.00 to $1.25 per gallon depending on your region of the country. Current propane costs run about $2.30 a gallon delivered.

Check out the 32KW SEISCO, its made in Houston Texas and has the most advanced digital power management of any of the electric tankless. Better temperature control and no flickering lights. It also detects flow by temperature, not flow so you can use with preheated water like solar, geothermal or a good old electric tank on a timer to take advantage of time of day rates. It should give you 5 GPM at a 40 degree rise. It also works in HARD WATER without a softener, try that with a gas tankless!

They have an optional "load shed" relay that allows you to control any thermostat controlled load so it doesn't run at the same time as the water heater. This allows the SEISCO to fit on existing electric panels where other electric tankless may not. Its got a 20sec delay and 3 minute cycle time so you can use with cheap A/C units with confidence.

Their service is in Houston, not India or Germany so you can get an English or Spanish speaking rep and parts ship in a day

Got math? Tengo matemáticas?

1kwh =3412 BTUs assuming 100% efficiency on the electric tankless

1 gallon of propane= 91600 BTUs burned in a 0.60EF HW tank, call it 55000BTUs delivered to the water, which mean's you're getting 55000/3412= ~16kwh-worth out of a gallon of propane.

Burned in a 0.80EF tankless call it 73000BTUs delivered to the water, or 73000/3412=~21kwh-worth per gallon of propane.

In my neighborhood electricty costs a bit north of 15cents/kwh, so running the electric tankless is equivalent to $2.40-3.15/gallon propane, depending on what type of propane HW heater you're burning it in.

The average rates in your home state of TX are 12cent/kwh, so there you're talkin' $1.90-$2.50/gallon equivalency, about 2x the numbers you're presenting.

See:http://www.eia.doe.gov/cneaf/electri...able5_6_a.html

Methinks you've got the math rong.

[Runs with bison]

Yep, without the relative rates the comparison is meaningless. And Dana was actually using pretty low values for incremental EF for propane. More likely is something in the mid 70's. Storage losses get tacked on as a fixed quantity.

Texas electric rates have been high because they did a bunch of conversion to nat. gas assuming it would be cheap long term. Electric hit 15 cents/kwh back in about 2005 while I was there, but I suppose it has dropped since then. It's one of millions of examples of the standard investment cycle stupidity by big business and utilities. It's funny how everyone acknowledges the cycles exist then do their economics and investment planning with no respect for those same cycles.