| Consumer | Education | Research |

| Testing & Certification |

The systems listed below were installed during the SWAP program that was conducted throughout Florida from 1994 through 1997. This listing provides information on the condition of these systems during inspections conducted between 2002 and 2004. The primary purpose of the inspection was to determine the operational status and condition of the systems.

Sites are listed below by various SWAP program areas in Central and South Florida.

Systems are identified as follows:

ICS = Integral collector storage system.
Diff = Active direct systems using a flat plate collector and differential controller.
PV = Active direct systems using a flat plate collector and photovoltaic controller.
Timer = Active direct systems using a flat plate collector and timer controller.

The Operational column indicates whether the system is still operating. Note that in some instances, Unknown is listed. In these cases, the complete system was not inspected. Nevertheless, partial inspections or photographs provided noteworthy information therefore the system was included in this listing.

Each listing has a separate information sheet. Select a site from the list. The site page includes an inspection record and thumbnail photographs. Click on a particular thumbnail for a larger image. Once an image is selected, the viewer can then select either the Next image or Previous image or Home to return to that specific systems information site. Or, a viewer can also use the browser's (Internet Explorer or Netscape Navigator) toolbar Forward and Back arrows instead of the Previous, Home, and Next commands that appear when viewing the enlarged images.

In addition, a spreadsheet tabulation of all sites identifying problem items noted during the inspections is provided at the following site:

Tabulation of site and system specific categories (in PDF format)

See General Comments on the inspections below.

CENTRO AREA
Site	System	Operational	Comments
795	Diff	No	Control
800	Diff	Yes	Control set on permanent "on."
801	Diff	No	New tank. Disconnected solar.
802	Diff	Yes
803	Diff	No	Control
804	Diff	Yes
805	Diff	Yes
807	Diff	Yes	Leaks at tank. Poor install.
808	Diff	Unknown	Unoccupied
811	Diff	Yes
812	Diff	Unknown	No access.
814	Diff	Unknown	No resident. 70' pipe run.
815	ICS	Yes
816	ICS	No	New occupant. New roof. No solar.
817	Diff	Yes
821	Diff	Yes
822	Diff	Yes
823	Diff	No	Pump. Leak.
824	Diff	No	Pump
825	Diff	Yes	Suspect extreme scale in collector loop.
827	ICS	No	Diverter valve in wrong position.
828	ICS	Yes
830	Diff	Unknown
837	Diff	No	Control.

CITRUS AREA
Site	System	Operational	Comments
1	ICS	Yes
3	ICS	Yes
4	ICS	Yes
5	ICS	Yes
6	ICS	Yes
7	ICS	No	Collector leak. Owner isolated.
34	ICS	No	Collector leak.
36	ICS	Yes	Absorber repaired.
37	ICS	Yes
38	ICS	Yes
42	Diff	No	Not enough hot water. Isolated.
44	ICS	Yes
46	ICS	Yes
47	ICS	Yes	Replaced freeze valve (JH).
51	ICS	Yes
58	ICS	Yes
773	ICS	Yes

LEE COUNTY AREA
Site	System	Operational	Comments
374	ICS	Unknown	Mounting problem.
375	Diff	Yes	Poor condition.
377	Diff	Yes
381	Diff	No	Tank replaced. System not reconnected.
383	Diff	Yes	Poor installation plumbing scheme.
387	Diff	No	Freeze damage to collector.
389	Diff	Yes
390	Diff	Yes
391	Diff	No	Freeze valve leaking.
392	Diff	No	Tank replaced. System not reconnected.
393	Diff	Yes	Freeze valve leaking.
395	Diff	Yes
396	Diff	Yes
652	ICS	Yes	Collector facing north.
653	ICS	Yes	Major mounting problem.
655	ICS	Unknown	Mounting problem.
656	ICS	Yes
850	ICS	No	Absorber leak.
853	Diff	No	Air vent leak. System isolated.
858	Diff	No	New roof. No collector.
864	ICS	Yes

MID FLORIDA AREA
Site	System	Operational	Comments
16	ICS	Yes
17	ICS	Yes
18	ICS	Yes
19	ICS	Yes
20	ICS	Yes	System was isolated. Corrected.
21	ICS	Yes
401	ICS	Yes
413	ICS	Yes
418	Diff	No	Collector leak.
422	ICS	Yes
428	ICS	No	Client inadvertently isolated the system.
429	Diff	No	Collector leak.
430	ICS	Unknown	Glass broken. No one at house.
432	ICS	Yes
438	ICS	Yes	Freeze valve starting to drip.
440	ICS	Yes
443	Diff	Unknown	No occupants.
446	ICS	Yes
452	Diff	No	Collector leak.
453	Diff	No	Collector leak. Removed system.
454	ICS	Yes
455	ICS	Yes	Freeze valve starting to drip.
458	ICS	Yes
460	ICS	Yes
463	Diff	No	Freeze valve leak.
464	Diff	Yes
468	Diff	No	Collector leak.
474	ICS	No	Collector removed. New roof.
475	Diff	No	Collector leak.
476	ICS	Yes
478	ICS	Yes
479	ICS	Yes	Freeze valve starting to drip.
484	ICS	Yes
486	Diff	Yes
488	ICS	Yes
491	ICS	No	Freeze valve leak. Isolated system.
493	Diff	No	Collector removed.
495	Diff	No	Collector leak. Removed system.
496	ICS	No	Freeze valve failed. Isolated system.
497	ICS	Yes
500	ICS	Yes
501	ICS	Yes
505	Diff	Yes
508	ICS	Yes
516	Diff	No	Collector/pipe leak.
526	ICS	Yes
529	Diff	Yes
530	ICS	Yes
532	ICS	Yes
533	Diff	No	Collector leak.
535	ICS	Yes
538	ICS	Yes
693	ICS	Yes
695	ICS	Yes	Inner glazing loose.
698	ICS	Yes
699	ICS	Yes
703	ICS	Yes
704	ICS	Yes
709	ICS	Yes
784	ICS	Yes
790	ICS	No	Exterior pipe leak.

METRO-DADE AREA
Site	System	Operational	Comments
22	Diff	No	Removed
23	Diff	No	Collector
24	Diff	Yes
25	Diff	No	Removed
26	Timer	No	Timer, check valve
28	Diff	Yes
29	Diff	No	Control, check valve
30	Timer	No	Valve, unoccupied
31	Timer	Yes
32	Diff	Yes
33	Diff	No	Pump, outlet
34	Timer	No	Removed
64	PV	Yes
68	Diff	No	New tank. System not reconnected.
75	Diff	Yes
81	Timer	No	Timer and pump defective.
91	PV	Yes
95	Timer	Unknown
103	Timer	Unknown
118	Diff	Yes
125	Diff	No	Control
131	Timer	No	Timer, check valve
145	Timer	No	Air vent leaking
154	Timer	No	Timer defective.
164	Diff	Yes
170	Timer	No	Timer defective.
195	Diff	No	Control
220	Diff	Yes	Shade problem.
233	PV	Yes
247	Timer	No	Timer
249	Timer	No	Removed
258	PV	Unknown	No contact
265	PV	Yes
269	Diff	Yes
288	PV	Yes
292	PV	No	Pump
293	PV	Yes
300	PV	Unknown	No contact
319	PV	Yes
723	Diff	Yes

CENTRAL AREA
Site	System	Operational	Comments
343	ICS	No	Leak in absorber.
345	ICS	No	Absorber removed.
348	ICS	Unknown	Possible leakage.
351	ICS	No	Leak in absorber.
361	ICS	Unknown
370	ICS	Unknown
658	ICS	Unknown	House unoccupied.
659	ICS	Unknown	House unoccupied.

---

General Comments

1. Systems should be kept as simple as possible. Certain systems that require client interaction are not recommended for this type of program.

2. Solar systems require periodic inspections and maintenance. The more complex the system (complex being more components) the more this applies. A large majority of problems were related to a variety of valves that required service and or replacement. The majority of low-income clients will not (cannot) expend funds to have systems maintained or components replaced even though the maintenance or repair charges are relatively minimal.

3. Agencies promoting and funding low-income solar programs should set aside funds for future maintenance and repairs. Otherwise their investments in these systems will be for naught once a component fails and the client isolates the solar system. Even if they do not fail, certain components have a set lifetime and should be replaced prior to that period.

4. A number of collectors were discovered to have failed, both flat plate and Integral Collector Storage (ICS). Contact with the flat plate manufacturer indicated that the majority of these failures were caused by a poor header/riser connection design which has now been resolved. The ICS manufacturer in turn had received some absorber materials that were not manufactured properly and led to leakage problems. During the standard warranty period, the manufacturers provided coverage for replacement or repair of defective absorbers. Unfortunately, many low-income clients did not contact anyone, but simply shut the system down whenever a problem occurred. Once the standard warranty period expired and the limited warranty took affect, the clients were then responsible for the labor portion of repairs. Because of this burden, once again many clients chose to deactivate the system instead of paying for labor charges. In many cases, the local weatherization agency used other funding sources to cover the labor fee for the clients. In other cases, the local weatherization agency informed the client that the SWAP program had terminated and that there was nothing they could do.

5. Exterior pipe insulation (and insulation coatings) was a major problem. Exterior insulation, due to the harsh external environments, requires periodic maintenance and re coating or replacement. It was discovered that in cases where the installers affixed metal foil tape over the piping insulation, the insulation was still intact. It is recommended that metal foil tape be used in future low-income solar programs – as well as in general installations.

6. A large number of air vents were observed to have either failed by leaking, or having the exhaust port sealed by scaling. Air vents are extremely susceptible to sedimentary scaling – especially in areas where water chemistry are ideal for this condition. Scaling buildup eventually seals the air vent’s exhaust orifice and also appears to affect the internal mechanism, leading to leaking air vents.

7. Problems with freeze valves led many clients to isolate their collector loop and therefore sacrifice the use of a solar system. These valves are used to prevent freeze damage in soar collectors. Their lifetime appears to be in the seven to ten year range and should at least inspected and /or replaced before this period. ICS systems would preclude the use of these valves if the correct piping and pipe insulation were used. This plastic bodied valve also incorporates a section of metal that was observed to have been rusting severely in many instances.

8. Anti-scald valves, while beneficially providing scald protection in the active pumped systems – especially where older and very young persons reside - were very susceptible to scale buildup within the internal parts of the valve. A large number of valves were stuck at a certain setting. This did not affect the performance of the valve – at that setting – but instead precluded any future adjustment. (Note that the clients had been informed to exercise the valve periodically, but in reality, people do not have the inclination to do this.)

9. Other than a few instances, the various controllers used proved to be quite reliably. Differential controllers had a few problems, but overall, the majority of theses controllers and their associated sensors appeared to have functioned quite reliably. The photovoltaic controllers appear to be the most reliable of the control methods used. Unfortunately, this was not the case with the timer controllers. Once again, the timer is a component that needs periodic client attention (periodically checking the set times and replacing the batteries). Inspections revealed that few timer systems were still working. In addition, clients had not periodically checked their timer or the timer’s backup battery.

10. Installation craftsmanship, in many cases, left much to be desired. Although all systems were installed by Florida licensed contractors, the knowledge of system installation methods and trade skills - as well as use of industry standard practices and material - varied widely from installer to installer. This was quite evident in all aspects of the installations - sealing of roof penetrations, securing sensor wiring, use of rust resistance materials, etc. Membership in the solar industry needs to be looked at as a professional trade – with it’s required skills.

11. Water heater failure was observed in numerous installations. These were conventional water heaters that, although part of the overall solar system, are also components that are required for heating water regardless of whether there is a solar system at the residence or not. Therefore, the water heaters cannot be seen as a “solar” component that has failed but instead as part of the overall water heating system. (Although higher solar temperatures may accelerate the eventual failure of the tank.) The majority of failures were due to leaks in the water heater – either from the internal tank of from fitting joints at the top of the tanks. When water heaters failed, the person or company replacing the water heater did not reconnect the solar system. It appears that neither the client nor those replacing the water heater understood the significance of the solar system.

12. Overall, most clients did not have any problems with having a solar system. A few even understood what the function of the system was and that it saved them money. Others were completely ignorant of the system and had to be informed what the "skylight" on the roof was for. A more thorough education program needs to be conducted in future low-income programs. Also, those receiving solar systems should have a commitment to that system. In turn, funding agencies should implement some type of long term maintenance program.

---

Tabulations

The number of instances discrepancies and notable negatives were identified during the inspection process – per system.

Item Instances
Insulation 60
Air vent 30
Collector 28
Freeze prevention valve 26
Sealing 23
Anti-scald valve 22
Wiring (exterior) 16
Tank (water heater) 15
Control 12
Mounting (collector) 12
Pressure relief valve 11
Piping (exterior) 11
Flashing (exterior) 8
Piping (interior) 8
Isolation valve 6
Insulation (interior) 6
Pump 6
Ceiling penetration 6
Wiring (interior) 5
Sensor (exterior) 2
Check valve 2
Drain valve 2
Disconnected (for unknown reasons) 2

---

It should be pointed out that system inspections were conducted at random during visits to respective geographical areas. Investigation was not conducted to try to determine what caused specific problems. What is noted above is what the inspector was able to determine from a visual and brief physical inspection of the system. For instance, once it was determined that a controller was no longer working, this was not followed up with an investigation of what made the controller fail. When air vents were leaking, or their exhaust ports calcified, the cause of the problem, possibly being water with an extremely high mineral content was not investigated. Neither was the effect of high temperatures and the acceleration of calcification. The cause of the freeze valve problems was not determined. Suffice it to say that the valves reached their lifetime expectancy. A survey of numerous solar installation companies does reveal that indeed the valves do last only x number of years - which corresponds with the observed field failures.More than anything, it appears that he vast majority of the low-income clients do not quite understand what they have and instead of maintaining and servicing their systems, they would rather sacrifice the system, and future savings, than expend funds to have the system repaired even when minor problems arise.

Privacy Policy | Terms and Conditions | Legal Notices