How to use these guides
These articles are written for installers, distributors and specifiers who already know their way around a DC circuit. Each guide takes one decision - sizing, protection, certification, transport or field failure - and works it through to the numbers you would actually put in a quotation. Where a claim depends on a standard, the article links to the body that publishes it rather than restating it second-hand.
New guides publish three times a week, on Tuesday, Thursday and Saturday. If a question keeps coming up in distributor onboarding, it is usually the next thing we write about - so read the FAQ below before sending a support ticket, and use the contact form if your case is not covered.
Frequently asked questions
Who writes these guides?
The Ruihan technical team writes them from installation experience and from the published standards, and each article lists the standards it references at the bottom. Product-specific figures come from our own test reports, not from third-party datasheets.
How often is new content published?
Three times a week - Tuesday, Thursday and Saturday. Older articles are revised when a standard changes or when field feedback contradicts something we wrote, and the revision date is shown on the article itself.
Who are these guides written for?
Installers, distributors and procurement staff. They assume basic familiarity with AC and DC systems, so they skip the introductory material and go straight to sizing methods, protection coordination and the paperwork a shipment needs.
Do the articles reference official standards?
Where a claim depends on one, yes - typically UL 9540A and UL 1973 for North American stationary storage, IEC 62619 for industrial lithium cells, UN38.3 for transport, and CE / RoHS for the EU. The link goes to the standards body, so you can check the current edition yourself.
Can I ask for a topic to be covered?
Yes. Send it through the contact form and describe the market and the application. Questions that recur across several distributors get prioritised, because they usually point at a gap in the public documentation rather than a one-off.
Where do I find specifications for a specific model?
Model-level datasheets live on the product pages under Energy Storage Systems and Power Inverter. If a document is missing, request it with the quote - test reports and certificate copies are released per model, some under NDA.
References: UL Solutions - UL 9540A and UL 1973 · IEC - IEC 62619:2022 · IEA - Batteries and Secure Energy Transitions (2024)
