Plug-in home battery electronics for the Netherlands need surge protection that is easy to mis-specify: Walsin Technology (Walsin) lists 17 varistors rated 275 Vac, and their peak current runs from 400 A to 80,000 A, a 200-fold spread. None of the 379 Walsin varistors in our export is on our shelf, so every one is a to-order enquiry.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from the Walsin varistor export (379 rows, 379 distinct part numbers) and our stock list as at 23 September 2026 (1,125 distinct part numbers). It is for a design or sourcing engineer at a Dutch maker, importer or integrator of plug-in batteries and micro-inverters who is crossing a mains varistor. Every part number is real and every count is ours, re-measured on 10 November 2026. The market statements name their sources and the day we fetched them.
What did Sunergy Research report on Dutch plug-in home batteries, and why does a component buyer care?
It reported a market that doubled in a quarter. According to Solar & Storage Magazine on 2 September 2026, citing Sunergy Research, just over 37,600 plug-in batteries were sold in the Netherlands in the second quarter of 2026, nearly twice the first quarter, taking the estimated installed base to about 80,000 from about 22,500 at the end of 2025.
The article names the end of net metering on 1 January 2027 as a major reason for demand, and the Dutch government’s business portal, which we fetched the same day, confirms that date and says suppliers will pay compensation for fed-back solar energy instead. Those are the sources’ figures, not ours. The conclusion we draw is ours: a plug-in battery or micro-inverter connects to a household socket, and anything on that connection sees mains transients. We have no relationship with any Dutch seller or maker, and we say nothing about what any of them buys.
Which Walsin varistors are rated 275 Vac, and how far apart are they?
Seventeen, in four series and eleven body sizes. We parsed the 379-row varistor export and found 17 rows at 275 Vac maximum working voltage, all with a 430 V varistor voltage and plus or minus 10 percent tolerance; peak current runs from 400 A on the 5 mm Standard disc to 80,000 A on the 34 mm square Industrial part.
Only 8 of the 17 are 14 mm or smaller. The rest are 18 mm to 53 mm discs for industrial equipment, not for a socket-sized product. We have not seen this counted anywhere. Walsin lists the same 275 Vac rating on every one, so the rating alone does not choose a part: body size and peak current do. Our post on choosing an MOV varistor covers what each column means.
Does the last letter of a Walsin varistor part number tell you the series?
No, and this is a common mis-read. We checked the suffix on all 379 part numbers: 108 end in E, and they split 48 High Energy E series and 60 Super High Energy V series, so a trailing E does not identify the series.
At 275 Vac, SR431K07E is High Energy at 7 mm with 1,750 A, while SR431K14E is Super High Energy at 14 mm with 8,000 A. The 14 mm Standard part, SR431K14D, carries 4,500 A. A buyer who reads the suffix as the series can pair the wrong peak current with a body size. The size digits in the middle of the part number, not the last letter, carry the disc diameter, and the series comes from the export’s Series column.
Which Walsin parts cross a 275 Vac, 14 mm, 4,000 A brief, and what differs?
Two parts match at 14 mm, and a third matches on current only. For a 275 Vac, 14 mm disc with at least 4,000 A peak, SR431K14D (4,500 A) and SR431K14E (8,000 A) match; SR431K10E also reaches 4,000 A but is a 10 mm disc.
The reader’s incumbent goes in the last column.
| Walsin part | Description | On shelf 23 Sep 2026 | Match / mismatch with the brief | Your incumbent |
|---|---|---|---|---|
SR431K14D |
Standard D series, 14 mm, 275 Vac, 430 V varistor voltage, plus or minus 10%, 4,500 A | No | Match on size, working voltage and current | |
SR431K14E |
Super High Energy V series, 14 mm, 275 Vac, 430 V, plus or minus 10%, 8,000 A | No | Match on the electrical fields; mismatch: higher-energy series | |
SR431K10E |
Super High Energy V series, 10 mm, 275 Vac, 430 V, plus or minus 10%, 4,000 A | No | Match on current; mismatch in disc diameter | |
SR431K10D |
Standard D series, 10 mm, 275 Vac, 430 V, plus or minus 10%, 2,500 A | No | Mismatch: 10 mm and 2,500 A, below the brief | |
SR431K07E |
High Energy E series, 7 mm, 275 Vac, 430 V, plus or minus 10%, 1,750 A | No | Mismatch: 7 mm and 1,750 A |
A match in the table is a match on the export fields, no more. The export does not state the surge waveform behind the peak current, and we hold no varistor datasheet. Confirm against both datasheets and qualify in your own circuit.
What does the Hong Kong shelf hold in varistors?
Nothing. Of the 379 Walsin varistors, our stock list as at 23 September 2026 holds 0, in any series or voltage.
So a varistor is a to-order enquiry from us today. That is a fact about our shelf, not about Walsin’s availability, and we make no lead-time promise. The ready stock list is a dated snapshot, never live-synced, and the varistor range lists the families. If your design is still open, the 275 Vac table above lets you pick a size before you ask.
What will we not tell you about home batteries?
Anything about your inverter, your battery chemistry, your product safety approval or Dutch grid rules. We hold 28 Walsin datasheets, 26 for MLCC and 2 for chip resistors, and none for varistors, so every figure here comes from export columns.
We make no claim that any varistor suits a plug-in battery, a micro-inverter or a 230 V socket, or that 275 Vac is the right rung for your supply tolerance. We hold no ISO 9001 or IATF 16949 certificate. We hold no office, entity or stock in the Netherlands; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We give no legal, customs or conformity advice; confirm with your compliance team. Qualification stays with you.
How can Venatech help a Dutch inverter or battery maker?
How Venatech helps starts with a free paste box. The cross-reference tool, called VenaMatch, decodes 18 manufacturers’ part numbers and covers 800,000+ crossable parts; paste up to 500 part numbers or an Excel or CSV file and every Walsin candidate returns with each field marked match or mismatch. Load a whole BOM for a review. The ready-stock list is a Hong Kong snapshot dated 23 September 2026.
Worked example from our own export: the 275 Vac, 14 mm, 4,000 A brief returned 2 parts that match at the size, none stocked. Venatech Limited is an authorised Walsin Technology distributor in Hong Kong; Stackpole and Viking are lines we supply. We serve from Hong Kong, welcome small lots, and you request a quote through the site.
The short version
For a Dutch plug-in battery maker, a 275 Vac varistor is a shortlist of 17, only 8 of them 14 mm or smaller, with peak current from 400 A to 80,000 A and a suffix letter that does not name the series. Nothing is on our shelf. Name the disc size and the current, not just the voltage.
Send us one varistor line from your BOM, with the working voltage, disc size and peak current you can accept, and we will return the Walsin parts with every difference stated. If your incumbent prints only 275 Vac, do you know which of the 17 you are buying?
Sources
Fetched 10 November 2026.
- Solar & Storage Magazine, “Record sales for plug-in batteries: market doubles and passes 80,000 installations” (Sunergy Research figures), 2 September 2026: https://solarmagazine.nl/nieuws-zonne-energie/i44665/recordverkopen-voor-stekkerbatterijen-markt-verdubbelt-en-grens-80-000-installaties-gepasseerd
- Business.gov.nl (Netherlands Enterprise Agency), “Netting scheme for solar panels ends”, undated page: https://business.gov.nl/amendment/netting-scheme-solar-panels-ends/
- Walsin varistor export and Venatech ready-stock workbook as at 23 September 2026, re-measured 10 November 2026 (internal files).
Related reading
- Choosing an MOV varistor
- MOV varistor series selection: D, E, V and Industrial
- Walsin passive components held in Hong Kong
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
How many plug-in batteries were sold in the Netherlands in the second quarter of 2026?
According to Solar & Storage Magazine on 2 September 2026, citing Sunergy Research, just over 37,600, nearly twice the first quarter, with an estimated installed base of about 80,000. These are the sources’ figures, not ours.
When does net metering end in the Netherlands?
The Dutch government’s business portal says the netting scheme ends on 1 January 2027, with suppliers paying compensation for fed-back solar energy afterwards. The page is undated, so check it directly.
How many Walsin varistors are rated 275 Vac?
17 distinct part numbers, across Standard D, High Energy E, Super High Energy V and Industrial series, with peak current from 400 A to 80,000 A. Confirm each against its datasheet before design-in.
Does a trailing E mean High Energy on a Walsin varistor?
Not reliably. 108 part numbers end in E: 48 are High Energy and 60 are Super High Energy. Read the Series column, not the last letter.
Which Walsin varistors are on the Hong Kong shelf?
None of the 379, as at 23 September 2026. The snapshot is dated, not live, so ask us through the site for current availability.
Do you hold stock or an office in the Netherlands?
No. We hold no office, entity or stock in the Netherlands; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or conformity advice. Confirm with your compliance team.