ThermOil Testimonials from the Solar Industry

The sole objective of test 091794, was to determine if a standard lead acid battery with ThermOil® Battery De-Mister® additive would evolve less water loss in an environment similar to that found in the Solar Voltaic applications, where the batteries are subjected to daylight charging through solar photo voltaic panels, than would identical batteries, without ThermOil® Battery De-Mister®.

batterydemister1The Batteries Under Test, were four identical Golf Car Batteries, of 220 Ampere Hour rating. Two of the batteries were treated with normal dosage of Thermoil. The other two batteries did not have Thermoil® Battery De-Mister®. The four batteries were assembled in a Series configuration to obtain a twelve cell, twenty-four volt battery pack.

Each of the four batteries was assigned a serial number: The non-oil batteries were assigned the numbers 1.1 and 1.2. The oil batteries were assigned the numbers 2.1 and 2.2.

The arrangement (starting at the assigned positive terminal) was 1.2 –2.1 – 1.2 – 2.2. This meant that the oil batteries were staggered as the second and fourth batteries in series.

Four (4) 51 watt solar panels were configured in series/parallel to obtain a maximum potential of six amperes of charge rate from the panels, the output from the array was sent through a “charge controller” (voltage regulator) that could achieve an accuracy of .1 VDC charge regulation. The charge controller was set to limit the charging voltage to 29.0 VDC. This is equivalent to 2.417 VDC per cell in the battery bank.

The batteries were weighed and recorded before the test began. The results of which are on file as reference 091794-A. The scale used is a precision digital scale, 0-150 lbs with .05 lbs resolution. A standard calibration weight of 50.00 was used throughout the test to confirm the stability of the scale definition.

table2The solar controller was enabled. This allowed the array to deliver 29.00 VDC to the battery bank. The array was subjected to day/night operation, cloudy and partly cloudy days. No load or discharge was put to the battery bank. The batteries were not cycled. At no time did the charging rate exceed 29.00 VDC.

A total of 2.93 KWH was transacted over a thirty (30) day period. The array was then disconnected from the battery bank. The batteries were then weighed. The results were recorded in a table in reference 091794-A.

The non-oil batteries had a considerable amount of electrolyte “carryover” on the top of the battery case. Batteries 1.1 and 1.2 were about equal in the amount of acid on the battery lid. The oil batteries had no acid or wetness on their tops. Batteries 2.1 and 2.2 had dry lids on them (see photo).

All electrical values were corroborated with the use of an Analogic DP-100 software drive 5 1/2 digit DMM. The reference weight is a 50.00 lb class K, N.I.S.T. approved measure.

differential3SUMMARY 091794

The test is remarkable in its simplicity. Four identical batteries were configured in a series; two with Thermoil® Battery De-Mister® and the remaining two without Thermoil® Battery De-Mister®. The environment that they were subjected to can be considered as “normal outdoor”. The test was conducted at a location in the Mojave Desert of California. The test started 17 September and terminated 17 October 1994.

The batteries were out of doors, not in direct sunlight. Daytime ambient temperatures, averaged 74ºF and night temperatures averaged 50ºF. The application of voltage regulated solar voltaic panels in a duplication of the environment of many thousands of similar lead acid batteries used in alternate energy format.

The weight loss “differential” is a direct, irrefutable, result of having an oil layer interfere with the natural electrolysis of H2SO4 into hydrogen and oxygen gas, which escapes through the vent caps of the cells. Loss of electrolyte level through evaporation is also suppressed by having the oil interfere with this process.

3dchart4The Thermoil® Battery De-Mister® batteries did not lose weight, while the non-oil batteries did lose weight (see 3D Chart 091794-A). The non-oil batteries were wet with carryover acid that migrated out of the cells and onto the top of the batteries. This carryover was noticeable, and was documented in a set of 35 mm photographs that was furnished to Thermoil Corporation. The Thermoil® Battery De-Mister® batteries had dry tops, which had an absence of any contamination, other than environmental dust.

The primary parameter of this test had all four batteries exposed to EXACTLY SIMILAR electric and environmental conditions. It is a fundamental law of electricity that the amperage shall be the same in any part of a series circuit. This makes it impossible to have different batteries subjected to different values during this test.

It is important to understand that this test does not imply anything other than which is explicitly stated in the text of this test. No other representations may be construe from the findings, other than the findings that the batteries differed in the amount of weight loss by the non-oil batteries.

David R. Eidell M.E.E.
Master Electrical Engineer


solar-peter-nocePositive Resources is a Solar Electric Designer, Dealer and Installer of off-grid solar electric stand alone power systems. I found your product in August of 2002 and decided to give it a try, so we ran a test on my own battery bank, before I endorsed the product for my customer use. I treated a battery bank consisting of 24 L-16 HC (1260 amp/hr @48 volt) that were two and one half year old. These batteries have been perfectly maintained. To Note: This is a 5 KW solar electric system with an average day output of 25KWH; average discharge per day is in the 20-25% of capacity. Here are the results for a one year watering cycle.

Month 1) No watering,

Month 2) No watering,

Month 3) Added 122 oz,

Month 4) No watering,

Month 5) No watering,

Month 6) Added 140 oz,

Month 7) No Watering,

Month 8) Added 108 oz,

Month 9) Added 55 oz,

Month 10) No watering,

Month 11) Added 66 oz,

Month 12) Added 38 oz,

Total 529 oz./ year

Prior to the addition of Battery De-Mister®, I was averaging water cycles of every 30 days of about 180 oz and over 200 in the summer months. Not only did Battery De-Mister® reduce my watering cycles by over 5 times, it also greatly reduced my labor cost. To water this set of battery banks would take 30 – 45 minutes each time. As of writing this the battery bank is approaching 7 years old and watering has slightly increased but no sign of battery storage loss. The other side affect of your product is a significant one. There is no existence of battery surface corrosion. As of writing this the battery bank is approaching 7 years old and watering has slightly increased but no sign of battery storage loss. About 5-6 months after the first battery bank treatment I started offering Battery De-Mister® to my customers, all the banks that have been treated are experiencing similar results. Battery De-Mister® is not offered as an option in my flooded lead acid banks anymore “It is a standard” All new battery banks that I offer are treated with Battery De-Mister®. We have treated all sizes of batteries from deep cycle marine, golf cart, L-16 to large 2 volt 33 plate 3000 amp/hr and continue to use Battery De-Mister®. Thanks for a simple and effective no fuss product that really works! Respectfully,

Pete Noce
Positive Resources
New Mexico

solar-pete-milesHello Terry,

I would like to thank you for providing us with Battery De-Mister and Battery De-Sulfater because the product works amazingly well. We have been selling your products for quite a few years and have experienced excellent results. We are a small company that designs, sells and installs solar power systems for grid-tied and off grid applications. Most of the batteries we sell go to our off-grid customers. “Off-grid” means that the house does not get power from the power company. The most common size battery is the L16 size. The battery banks range in size from 4-32 batteries. Some of these battery banks are well-cared for and some get beat up quite badly. I do most of the off-grid sales and I almost always sell the De-Mister. We frequently install the De-Mister into the batteries before the customer gets them. The list of customers that have called with good reports on their batteries is quite long so I will only share the most recent one with you today.

Last week Becky called us to talk about a problem with her inverter/charger. She and her family live in a house that is off-grid, (no power from a power company). When I asked her “how have your batteries been doing for the last 3 years?” this is what she said; “Well I check the water level every 3 months and sometimes I have to put almost 1 cup of water into each battery, I guess that blue goo you put in there works pretty good.”

For those of you who are not familiar with living off-grid on L16 batteries, this is fantastic proof Battery De-Mister does exactly what Terry says it does.

Thanks Terry,

Pete Miles
Advanced Power Redding
Redding, CA

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