The RC-S100 is a new idea in solar charging. Conventional battery charging uses constant current which results in the anticipated wearing out of batteries and the loss of capacity due to sulfation build up. In addition to that, conventional solar and wind energy harvesting charging methods ruin batteries faster than standard conventional battery charging because the battery plates get rapidly stressed back and forth between charging and loading. This causes the battery plates to become damaged in a way similar to metal fatigue. When a battery is being charged it is pushed in one direction away from the center rest position. When it is being loaded it is pushed in the opposite direction. Unlike capacitors, batteries are not made to immediately cycle from the stress of being charged to being loaded without resting between such extremes. They can be charged for a period of time and return to a state of rest. They can be loaded for a period of time and return to rest. But if they are forced from either of these to the opposite states back and forth it tends to damage the plates in a similar way as work hardening in metal. There are other losses in relation to efficiency when this is done. To reduce this rapid damaging of batteries people are usually forced to spend a lot more money for very large battery banks that will not be damaged as much as with smaller battery banks are.
The RC-S100 is a two battery bank system (see bank A and B terminals). The three models can have as much as 100A of solar panels arranged for charging suitable 12, 24 or 48V battery banks (that is 1800W, 3600W and 7200W input). All three of these models can power up to 250A loads (3KW, 6KW and 12KW respectively) when there is sufficient battery capacity and wire. There are two battery banks, where, periodically one battery bank becomes isolated from the load bank while it experiences ideal charge and rest cycles when needed. During the day, or when input power is provided, the batteries are cycled around between charging and loading. At night the two banks are brought together to provide maximum load. The cycling of batteries from being placed into a state of charging or loading is minimized, and sufficient rest periods between these opposite states is given. The charging batteries are also being rested several times every hour. During the rest periods the solar input is not cut off, and is used towards the load. This is the only way to properly charge batteries in solar or wind systems that have changing inputs and outputs.
The split battery bank still gives you essentially the same amp hour capacity that you would have with a single bank. At night the two batteries are paralleled so they become one bank together. The only limitation is that during the day the charging bank will not be powering the load at all.
Instead of paying the high cost in replacing your batteries every few years we recommend using the Renaissance charging technology that has not only rejuvenated most useless batteries over the last 15 years but allows people to have the peace of mind in knowing that a non-destructive method is being used to charge their batteries. Our customers all over the world have been using this technology 24/7 to bring back about 80% of many millions of useless batteries, and they see completely opposite effects from what they experienced with conventional processes upon batteries over time. The unique damage done to batteries used in all conventional solar systems is not reversable as that is not merely a sulfation build up problem as mentioned. Our new RC-S100 controller will not fix that kind of previous damage while it can rejuvenate most batteries that are sulfated from conventional charging or from sitting idle.
We do not worry about cycling our Renaissance charged batteries as we have seen them increase in capacity with cycling. Over time we find our Renaissance charged batteries have higher charged resting voltages which translates to more useable capacity. It is not just on the high side that we see such gains. We also see real capacity gains at the lower voltages where people never expect to load their batteries. Normally a 12 volt battery rapidly drops off when discharged to 10.5 volts. Since there is normally little useable power lower than 10.5 volts, inverters are made to turn off at that voltage, with a warning buzzer coming on at around 11 volts. We have found that after Renaissance charging we have seen real capacity gains all the way down to 1V, and we do not damage our batteries with deep discharges or cycling.
If inverters can be modified and set to a lower voltage cut-off when using our charge controller then you could draw much more out of your battery banks.
This controller has been used and demonstrated with our larger motor energizer systems which have the generator coil output. A suitable bridge rectifier would need to be added to create the necessary DC input into the controller.
This controller is rated for up to 100A of charging and 250A discharging. You must choose the right capacity battery bank for both the solar panels you use and the loads you wish to power. This requires at least a basic understanding of the C rates of charging and discharging of batteries.
A battery that receives a charge current of one ampere (1A) passes one coulomb (1C) of charge every second. In 10 seconds, 10 coulombs pass into the battery, and so on. On discharge, the process reverses. Today, the battery industry uses C-rate to scale the charge and discharge current of a battery. Most portable batteries are rated at 1C, meaning that a 1,000mAh battery that is discharged at 1C rate should under ideal conditions provide a current of 1,000mA for one hour.
You can consult battery specification sheets that show you several different charging and discharging rates for specific batteries. A common example of charging lead acid batteries to consider is where golf carts can use 225AH (amp hours) battery banks at a 30A rate over many hours. 100 Amps of charging would require a minimum of 750AH battery banks. The controller can be used with much less capacity batteries if the charging and loading is also limited to the stated capabilities of the batteries.
As for determining the necessary capacity of batteries for loading, it is important to consider your peak loading and voltage drop under big loads. This is what most people fail to consider. A battery will drop in voltage under load according to the amount of the load. So if you have a relatively small battery bank, and run a big load through your inverter, if it is big enough, the voltage drop will be lower than 10.5V, and the inverter will turn off. In that case the battery is not actually discharged, but the voltage drop is lower than the inverter cut off 10.5V (or 21V for the 24V battery bank systems). This also depends on the wire size (width and length) used with the batteries, as well as the connectors. This becomes more problematic the more discharged the battery is when you attempt to power a big load. A discharged battery will have less capacity than a charged battery, and the voltage drop will reach that cut off faster. The Renaissance charging system can also allow batteries to be significantly loaded with lower voltage applications (such as with DC loads like motors), or if inverters can have lower cut off voltages, which gives you access to a lot more of the charge in your batteries.
The 250A total loading is for either the one battery bank during the day or the two combined batteries during the night.
There is always one battery (or two at night) connected to the load output. It can be whatever you wish it to be. Any inverter or DC application.
The input to the system has a maximum of double the battery voltage, so anything more would require some kind of hybrid step down.
Comes in an 10" steel case with external 5/16" bolt terminals for Solar, inverter/output, and two battery bank connections.
Shipping weight approximately 9 lbs in a 10 x 8 x 6" box.
Limited 1 year warranty.
Ships April 2022