APRS8420 APRS8421 Air Diversion Load Heaters

Diversion Loads - Air Heating
for use with micro hydroelectric and wind generators

These diversion loads are used to dissipate extra electricity from wind and hydroelectric turbines to prevent overcharging batteries. Use the following formulas to compute and convert the electrical parameters.

APRS World's dump load is available as a building block element. The base block is 600 Watts. Mounting base is required and must be purchased separately. Designed for safe, easy and code-compliant wiring. These resistor loads enclosed with a vented stainless steel cover on a powder coated chassis. The enclosure may get hot during operation and should be mounted at least 12" from any flammable material. Available in two versions: 0.375 ohm 12V model which can be reconfigured to 1.5 ohms 24V or 6 ohm 48V model. Reconfiguration easily done at terminal block. Warranty 2 years.

These resistive loads enclosed in vented aluminum boxes can be used in 12, 24 and 48 Volt diversion regulation systems. The aluminum box may get very hot in operation. It should be mounted on a nonflammable surface and should be at least 12" from any flammable material.
Choose a heater from the table below to match the output of your system.

WARNING: These heaters should be checked annually for bad or burnt connections resulting in excessive heat from loose wires or incorrectly set systems. If not correctly set, generator power could be diverted into the heater. Look for burnt, discolored wires or broken resistors.

The HL-100 can be configured as a 4 Ohm, 1 Ohm, 0.5 Ohm or 0.25 Ohm load by changing the connections.

The HL-75 can be configured as a 3 Ohm or 0.75 Ohm load by changing the connections.

Model	Resistance Setting	Diversion load Amps & Watts at these Voltages
Model	Resistance Setting	14V (12V nom)	15V (12V nom)	28V (24V nom)	30V (24V nom)	56V (48V nom)	60V (48V nom)
HL-100	0.25 Ohm	56A/784W	60A/900W	over rating	over rating	over rating	over rating
	0.50 Ohm	28A/392W	30A/450W	over rating	over rating	over rating	over rating
	1 Ohm	14A/196W	15A/225W	28A/784W	30A/900W	over rating	over rating
	4 Ohms	3.5A/49W	3.8A/56W	7A/196W	7.5A/225W	14A/784W	15A/900W
HL-75	0.75 Ohms	19A/261W	20A/300W	38A/1045W	40A/1200W	over rating	over rating
HL-75	3 Ohms	4.7A/65W	5A/75W	9.3A/261W	10A/300W	19A/1045W	20A/1200W

This resistive load is finned and needs no enclosure. Resistance is fixed at approximately 7.58 Ohms and can be operated at up to 120V. Unit is 21" long x 2" wide x 1.37" high over the fins. Sheath temperature can reach 1200F when operated at 120V but will be significantly less at lower operating voltages. Includes high temperature porcelain terminal covers. Terminal studs are #10-32. See below for power dissipated at various voltages.

APRS Enclosed Versions	Finned Versions
12Vdc 0.375 Ohm 40A/24Vdc 1.5 Ohm 20A	24V 76W through 120V 1900W
Item Number: APRS8420 Price: $219 Price last updated 3/24/2023 Shipping Weight: 8 lbs. This item normally ships in approximately 2-3 weeks or less.	Item Number: DLOAD-AIR1900 Price: $110 Shipping Weight: 3 lbs. This item normally ships in approximately 2 weeks or less.

APRS 48Vdc 6.0 Ohm 10A
Item Number: APRS8421 Price: $219 Price last updated 3/24/2023 Shipping Weight: 8 lbs. This item normally ships in approximately 2-3 weeks or less.

APRS Mounting Bases	HL Enclosed Versions
Item Number: APRS8425 Price: $69 Price last updated 3/24/2023 Shipping Weight: 2 lbs. This item normally ships in approximately 2-3 weeks or less.	Item Number: HL-100 Price: $270 Price last updated 8/23/2021 Shipping Weight: 5 lbs. This item normally ships in approximately 2 weeks or less.
Item Number: APRS8426 Price: $219 Price last updated 3/24/2023 Shipping Weight: 3 lbs. This item normally ships in approximately 2-3 weeks or less.	Item Number: HL-75 Price: $270 Price last updated 8/23/2021 Shipping Weight: 5 lbs. This item normally ships in approximately 2 weeks or less.


APRS8420 APRS8421	APRS8425 single base	APRS8426 4 base	HL-100 HL-75	finned heater
click thumbnail image above to enlarge

24V	76 Watts
36V	171 Watts
48V	304 Watts
60V	475 Watts
96V	1216 Watts
120V	1900 Watts