Blog Archives

Solar Power – eCharger UPGRADE

Project Re-cap

Last year’s project, detailed here, built a charger that collected and stored solar energy for use by an eBike, also for charging additional Li-ion or Ni-Cad batteries for other equipment as well as powering LED lights for illumination of the work space.

These 4 main elements were put together to create the solar charging ‘system’: Solar Panel, Charge Controller, Battery, Inverter. The resultant assembly captures energy from the sun via the solar panel, ‘conditioned’ by the controller and stored in the battery. This therefore provides an ‘off-grid’ 12V DC power source, or via the inverter as 240V AC ‘mains’ subsitute.

Experience from use

What wasn’t certain at the time of the project construction was how much energy would be available to be captured (estimates indicated sun 2-3 hours per day, weather and time-of-year dependant), how much could be efficiently stored and what would be needed to charge the eBike (understood to require around 3-4 hours for a full charge) and/or for the other uses. 

It had been assumed that there would be sufficient sunlight during summer days to adequately charge the storage battery, but at other times of the year the energy might be lacking, requiring additional solar panels for more energy generation.

The experience gained from use indicated that more solar panels were not needed, as enough energy was being captured, resulting in a fully charged battery (indicated by the charging stopping, despite it being sunny) when not being used for eBike charging. What was noticed however was that if the eBike had been used for a medium to long ride, requiring moderate to high charging afterwards, that insufficient energy was available from the storage battery to power the inverter (indicated by an audio alarm) long enough to fully charge the eBike.

The resulting conclusion was that the storage capacity was needed to be increased, to capture more sunlight energy to be available for charging purposes.  

Storage Upgrade

It was decided to purchase a second 12V 110AH 800CCA AGM-type battery, of identical make and specification as the original, thereby doubling the storage capacity (although since its advisable to allow for discharge of only 50% of the stated rating, the total energy available is taken to be 110AH). This compares with the capacity of the eBike battery, which is 36V 11AH (400WH).

Twin AGM batteries

It is important to note how additional batteries are added to a solar energy system. The choice is between series or parallel connection. 

Series would result in a doubling of the operating voltage to 24V. This would bring some advantages in terms of lower current rating for wiring gauge with the same power, and a simpler daisy-chaining method of connection. However, this is only possible if the other system components are rated for 24V operation.

For this upgrade, it was chosen to add the additional battery in parallel, thereby keeping the operating voltage at 12V (suiting the controller and the inverter) whilst providing more current. The parallel connection requires the battery terminal connections to be separately wired to the inverter and controller connection points, and for safety an additional fuse was added so that each battery is separately fused to protect against a short-circuit.

Twin batteries and inverter in use

Conclusions

Limited experience to date of the upgraded 2-battery-storage Solar power system finds that there is now sufficient energy available to completely charge the eBike even after a long ride, without incurring a low-energy warning from the inverter.

Charge controller with 2A input

The conclusion is reached that due to the usage pattern of occasional eBike charging compared with the daily solar energy collection, that more battery storage is a more appropriate choice over more solar panel energy generation. This is re-enforced by the fact that on poor-weather days, although there is a lack of available solar energy, the eBike is unlikely to be used, so the energy usage requirements are also low!

eBike fully charged

If will be interesting to monitor the performance of the upgraded system through the seasons of another year.

@YellowsBestLtd we are always looking to expand our portfolio services for #business development and #enterprise support, and increase the mix of solutions for #sustainable systems and maintenance of new and legacy #technologies and products for our customers. Please get in touch to discuss your requirements; we look forward to hearing from you.

Posted in Uncategorised Tagged with: , , , , ,
Blog Archives

Merry Christmas

@YellowsBestLtd we would like to thank our Customers for your enquiries and orders throughout this year, as well as our Suppliers for your support.

We’re pleased to have been of assistance providing services and solutions. Now into our fourth year of trading, we appreciate your continued interest and support, and look forward to continuing our business relationship in the New Year ahead.

Wishing a Merry Christmas to you and your family.  

Posted in Uncategorised Tagged with:
Blog Archives

Consultancy Services

A flexible approach to Consultancy provision

It has been a pleasure providing consultancy services to a client who was looking to develop their product sales business. YellowsBest’s approach is to tailor what we provide to meet the Customer’s exact needs. Several stages of activities were therefore established, reviewed and amended before these ‘workpackages’ were acted upon.

Strategy Workshop to identify the requirements

To thoroughly establish and document the ‘needs’,  a relatively informal but comprehensive ‘workshop’ was held.

This included the following key topics:

  • Strategic Requirements
    • Mission Statement
    • Objectives
  • Capture of Market Provision
    • Markets Classification
    • Customers
    • Vendors
    • Competitors
    • SWOT
    • PESTLE
  • Strategy Development
    • Portfolio Development
    • Action Summary

This produced the ‘framework’ for the consultancy provision and provided an invaluable tool for measurement of progress toward the goals which were documented as part of this process.

Undertaking key tasks to assist Strategy implementation

A number of tasks were undertaken on behalf of our client in order to assist with the putting into action of the documented strategic aims:

  • Identification of desired Product Portfolio
    • Suitable Technologies
    • Appropriate Vendors
  • Liaison with chosen Vendors
    • Initial approach
    • Arrangement of introduction meetings
  • Creation of Marketing Material
    • Content for Website
    • Production of Brochures
  • Business Development
    • Sales Prospects and Customer enquires
    • Technical Solutions and Quotations

Naturally, the implementation and development of a sales Strategy is a long-term undertaking, and YellowsBest is able to provide ongoing support to its clients with the assistance they need, as and when required, in order to ensure long-term success.

Summary of assistance YellowsBest can provide

YellowsBest is able to assist companies by providing consultation advice for a wide range of initiatives, such as:

  • Creation of Business Plans for identifying markets, customers and strategic propositions
  • Sales Strategy formulation for the generation of prospects and reaching customers via direct and channel approach
  • Assistance with key sales and business development tasks, including customer enquiries and presentations, liaison with vendors, attendance at industry events and content creation for websites and marketing initiatives
  • Performance Measurement analysis to understand success ratios and identify corrective actions to improve utilisation of resources and optimise business efficiency

YellowsBest is able to provide its consultancy services on an ad-hoc day-rate basis, or as a more structured project-delivery, over a number weeks or months as appropriate.

YellowsBest can also provide a range of other related Management Services, including Account Management, Bid Management, Business Development, Channel / Vendor Management, Commercial / Contract Negotiations, Sales and Marketing, Solutions Engineering and Training.

Please contact us to discuss how we may be of assistance to your organisation.

Posted in Uncategorised
Blog Archives

Vero Trivolt PSU – ‘product of the month’

TRIVOLT AC/DC-converter Power Supply Unit

Manufacturer: Vero

Model Number: PK60A

Product Code: 116.010018J

Description

60 to 120 Watt switched mode AC/DC plug-in power supply with three outputs in 3 U Eurocassettes for use in 19” subracks to IEC 60297-3.

  • 3 high stability outputs, all adjustable
  • √  Safety approvals to UL, cUL and EN 60950
  • CE marked for compliance to EMC and Low Voltage Directives
  • SENSE-operation (5V output)
  • Overvoltage protection (OVP)
  • Powerfail signal optional
  • No-load and short circuit proof
  • Coded H15 connector
  • VERO standardised pinning

Specifications

  • nom. height: 3U
  • nom. width: 8H
  • nom. depth : 160mm
  • output power: 60W
  • voltage outputs:
    • V1: 5V/6A
    • V2: -12-15V/1A
    • V3: -12-15V/1A

To purchase, contact us.

Posted in Uncategorised
View My Stats