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Description
Mastervolt Charge Mate Pro 40 - Electronics Charge RelayCharge Mate Pro 40 Electronics Charge Relay Current limited electronic charge relay with high efficiency and reverse current protection A secondary battery on board requires a dedicated charging solution. The Charge Mate Pro makes it possible to distribute the charger or alternator current effectively between two battery banks such as a starter and a service battery. The Charge Mate Pro connects both batteries during charging and keeps them isolated
Charge Mate Pro 40 - Electronics Charge Relay
Current limited electronic charge relay with high efficiency and reverse current protection
A secondary battery on board requires a dedicated charging solution. The Charge Mate Pro makes it possible to distribute the charger or alternator current effectively between two battery banks such as a starter and a service battery. The Charge Mate Pro connects both batteries during charging and keeps them isolated when discharging. This significantly reduces the risk of a flat starter battery for example.
The Charge Mate Pro offers an additional advantage over mechanical charge relays, by limiting the charge current to the second battery. The primary battery, like a starter battery, is therefore charged with priority. The return current is automatically blocked even when the secondary battery has a higher voltage. An emergency start function is possible by connecting an optional bypass switch to the Charge Master Pro.
A marine application example is the connection of a bow thruster battery to a service battery. The Charge Mate Pro ensures that the service battery is always charged with priority. The blocking of the return current from the bow thruster battery guarantees that the bow battery remains charged while the current limiting also prevents power dips of the onboard electrical network.
The Charge Mate Pro series consist of a 40 Amp and a 90 Amp version, both suitable for charger or alternator applications.
Charge Mate Pro: for controlled charging from a single source.
Applications
- Leisure and professional marine and mobile applications. An effective solution for high power demand on board and/or the need of prioritised or current limited charging.
Features
- Electronic charge coupling with very low voltage drop
- Makes effective dual charging possible
- Suitable for all battery types, including Lithium Ion
- Charge current secondary battery limited to 40 A
- High system reliability by prioritised charging of the main battery
- Unidirectional which blocks return current under all circumstances
- Prevents power dips of the onboard electrical network
- Suitable for all kinds of chargers and alternators
- Monitoring with LED status indication
- IP65 electronics in a corrosion resistant casing with aluminum heat sinks
- Fast and easy installation
General specifications
- Remote switch functions: on, off, auto, start assist
- Monitoring: LED (warnings and status indication)
- Output current: limited to 40 A
- Number of battery outlets: 2
- Input voltage range: 9-32 V
- Parallel configuration: yes
- Battery voltage: automatic 12/24 V detection
- Dimensions, hxwxd: 157 x 140 x 80 mm / 6.2" x 5.5" x 3.1"
- Weight: 0.88 kg / 1.9 lb
- Approvals: CE
Technical specifications
- Connection possibilities: 3 x fast-on connectors (switch, ground and status) o switch: for an optional single pole ON-OFF-ON switch for remote operation o status: for an optional LED indicator
- Power consumption: switch open: < 1 mA at 12/24 V DC
- Battery types: all types (Lithium Ion protection via Multi purpose contact, product code 77030500)
- Switch on voltage: 13.5 V (12 V) / 27 V (24 V)
- Switch on delay: 5 sec.
- Switch off voltage: 12.75 V (12 V) / 25.5 V (24 V)
- Switch off delay: 2.5 sec.
- Relay: electronically (mosfets with low voltage drop of max 0.2 V)
- Temperature range (ambient temp.): -40 °C to 60 °C -40 to 140 °F
- Protection degree: IP65
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
Owner's Manual (pdf)
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 4
Great value, easy to take, and Great quality
Style: 2000IU, Size: 360 Count (Pack of 1)
This is one of those no-fuss supplements you can actually stay consistent with. The softgels are small, easy to take, and don’t leave any weird aftertaste. Love that it’s in olive oil for better absorption.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
A great supplement!
Style: 5000IU, Size: 360 Count (Pack of 1)
Great value and it's working very well. Highly recommend!
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Reviewed in the United States on May 15, 2026
★★★★★ 5
There is a difference in brands
Style: 5000IU, Size: 360 Count (Pack of 1)
Thank you for allowing me to try your NatureWise Vitamin D3.
There are indeed so many reasons why we should supplement Vitamin D. It is necessary for so many crucial processes in our bodies; from helping us absorb enough calcium and helping us have strong bones and teeth. With everything that is literally "going around" these days, it is crucial that we maintain an efficient and effective immune system. We need Vitamin D to do that.
For me personally, as a 25+ years ago back surgery patient who is still very mobile, one of the ways I benefit from this particular supplement is helping to keep inflammation at bay so that I am able to be more comfortable and more active. I noticed a big improvement when I started taking this NatureWise brand. They apparently make it more "user friendly" to the body. What's the point in taking other brands of anything if your body can't use it, or worse, has to figure out how to try to get rid of it?
I have had this same experience with the other NatureWise products I have chosen to use.
Another of the most important reasons we need adequate Vitamin D, is so that our brains will stay healthy so that we will have less likelihood of developing Alzheimers and/or Dementia. Sound supplementation from a company that uses only quality and natural ingredients is not optional but rather crucial to every person. A person can change their destiny by changing what goes "down the hatch".
Whatever your current lifestyle, you can start right now. The right supplements, along with careful and selective nutrition, can literally re-map a person's health.
I trust NatureWise to help me in my journey to overcome and persevere so that I will have quality to go along with my quantity of life. I encourage everyone to use the products NatureWise offers. Selecting their products saves me time and effort of looking up all of the ingredients listed on some other brands only to find out that those ingredients are basically trash to my body.
It is so important to note that all Vitamin D (or any other) supplements are not created equal. NatureWise is a good company that seems to make careful decisions about the sources, ingredients and processes used in all their products. Thank you NatureWise for providing us a Vitamin D3 supplement using certified organic, cold pressed, extra-virgin olive oil for maximum absorption.
According to world-renowned Dr. David Perlmutter, neurologist, "Vitamin D plays a fundamental role in brain health, immune function, and inflammation. According to Dr. Perlmutter, vitamin D influences the expression of more than 913 genes. Sadly, a vast majority of people are dramatically deficient in this critical steroid hormone, in large part because they've been fooled into fearing sun exposure. You've also been deceived into fearing cholesterol, which is another critical component of health.
"Obviously, sunshine makes vitamin D in your body from some precursor. When I ask my patients what is that precursor, nobody seems to know. I tell them it's this horrible thing called cholesterol, and their eyebrows go up," he says. "Cholesterol is so drastically important for health, because (1) it's the precursor for which you make vitamin D and (2) it's a fundamental compound of every cell in your body and made by every cell in your body. It's a brain antioxidant. It's a precursor for all the steroid sex hormones – it's fundamentally important.""
I have recently became acutely aware of the prevalence and cruelty of Brain diseases. My genius-level, go-getter Mother was diagnosed with a rare form of Dementia. As we know, Dementia and Alzheimers is essentially untreatable and incurable. PREVENTION, however, IS possible, no matter what may be in our "genetic tree". In addition to my mission to obtain as much information to help my mom, I am seeking any solid information that will help me to avoid such a horrible end.
More from Dr. Perlmutter:
"It's important to realize that, despite what the media tells you, your brain is not "programmed" to shrink and fail as a matter of course as you age. We now know that every activity in which you engage—be it exercise, the foods you eat, the supplements you take, your personal relationships, your emotional state, your sleep patterns—all of these factors dramatically influence your genetic expression from moment to moment. Any given gene is not in a static "on" or "off" position. Neither are they deterministic. You may be a carrier of a gene that never gets expressed, simply because you never supply the required environment for it to turn on.
"We interact with our genome every moment of our lives, and we can do so very, very positively," Dr. Perlmutter says. "Keeping your blood sugar low is very positive in terms of allowing the genes to express reduced inflammation, which increase the production of life-giving antioxidants. So that's rule number one: You can change your genetic destiny.
Rule number two: you can change your genetic destiny to grow new brain cells, specifically in the hippocampus... Your brain's memory center regenerates. You are constantly growing new brain cells into your 50s, 60s, 80s, and 90s – throughout your lifetime – through a process called neurogenesis.
That said, these two ideas come together because you can turn on your genes through lifestyle choices that enhance neurogenesis and that enhance regrowth of cells and expansion of your brain's memory center. This was proven by researchers recently. They demonstrated that there are factors under our control that can make that happen.""
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Reviewed in the United States on September 5, 2014
★★★★★ 5
Best Vit D on market. Dont change the ingredients
Style: 2000IU, Size: 360 Count (Pack of 1)
Got my vitamin D lab levels from 19 to 36
30 and up is normal
Actually works with blood lab results proof
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Empowered Health With a Trusted Daily Tonic
Size: 2 Fl Oz (Pack of 1), Style: Seed Oil
🌿 Key Highlights
1. Clean, high-quality formulation
This oil is cold-pressed, preserving all the natural thymoquinone and antioxidants, as confirmed on the brand site  . It’s also GMP-certified and hexane-free, and includes a thoughtfully curated blend of vitamins D3 and K2—perfect for bone, joint, and immune support. ()
2. Noticeable health improvements
Customers report energy boosts, improved digestion, reduced stress, and joint relief. One reviewer mentioned “lower blood pressure, better sleep, reduced anxiety, and even 17 lbs lost” . Another said their nails and skin “are in their best shape.” 
3. Versatile and easy to take
The dropper makes dosing simple—1 ml once or twice daily. I mix it in smoothies or take it straight, followed by water. It’s also applied topically for skin hydration and healing. 
⸻
✅ Pros + Cons
👍 Pros:
• Pure, high-potency oil with added nutrients—value-packed
• Tangible benefits: energy, digestion, mood, stress
• Fortified blend supports skin, immune, bone health
• Amazon reviews show high satisfaction (4.8★ from 195 users)  
👎 Cons:
• Strong herbal taste—some users mask it with water or tea ()
• Small bottle (2 oz)—plan for regular use
⸻
💡 Pro Tips for Users
• Start with 1 dropper/day to assess tolerance, then increase.
• Use a permanent marker to jot the start date for easier tracking.
• Store in a cool, dark place—cold pressing makes it sensitive to heat/light.
⸻
🏆 Final Take
GuruNanda Black Seed Oil offers a powerful, multi-benefit approach in a single bottle. Between its purity, nutrient boost, and real-world effects—from energy and immunity to digestion and joint comfort—it’s earned a permanent spot in my daily routine. Whether you’re seeking holistic wellness or functional support, this is a smart, effective addition to your shelf.
Highly recommended!
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Reviewed in the United States on July 14, 2025